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Regulatory Compliance (IEC 62443, NIS2)

We translate IEC 62443 and NIS2 requirements into measures you can apply on your installations, with no interruption to production, no operational downtime.

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When to use this service

You've just been identified as an essential or important entity

You've been notified of your NIS2 scope and management is asking where the site stands. No one has yet measured the gap between the requirements and the actual state of the control systems.

A client requires an IEC 62443 level in their specifications

A client, an insurer, or a network operator is making a contract conditional on a target security level. You need to know what that level actually means for your existing installations, and what's missing.

An extension or retrofit project is starting

A new line, a new substation, or a supervision replacement is underway. Security requirements need to enter the specifications before the order is placed, not be added after commissioning.

An internal audit or an incident left findings unaddressed

Gaps were identified a year or two ago, without prioritization or a designated owner. The subject comes back up at every review and nothing moves forward for lack of a plan that works for operations.

[ Why compliance for an industrial system isn't handled like compliance for an information system ]

A compliance standard is written to be generic. An industrial installation, on the other hand, is unique: PLCs installed fifteen years ago, a flat network inherited from several successive extensions, remote access left open by integrators for maintenance, a supervision system that can't be restarted mid-production run. Between the text and the field, there's a translation job to do. That job is what's difficult, not reading the standard.

IEC 62443 can't simply be declared at the level of an entire site. It first requires defining a system under consideration, then breaking it down into zones and conduits, then assigning each zone a target security level consistent with the actual risk. Many organizations skip this step and end up comparing their installation to a list of requirements with no defined scope. The results are then impossible to interpret: you can no longer tell a real gap from a requirement that doesn't apply.

The NIS2 Directive adds a constraint of a different order: it covers governance, risk management, the supply chain, and incident reporting, with accountability reaching up to executive management. A plant can have competent technical teams and still be non-compliant because no one has formalized who decides, who reports, and within what timeframe. Conversely, flawless documentation is worthless if the field survey shows a supervision station reachable from the office network. Useful compliance is compliance that can be verified on the installation, not compliance declared on a spreadsheet.

Our approach

<p>The assignment runs in five steps, from scoping to the compliance plan. The standard is always brought back to your actual installation: we start from what's running, not from what should be running. The operations teams are involved at every step.</p>

[ Step 01 ]
Scoping

We define the system under consideration: which sites, which processes, which control systems. We identify the applicable regulatory regime, essential or important entity under NIS2, and the target security level expected under IEC 62443. Operating constraints, production runs, shutdown windows, and access restrictions, are established before any intervention.

[ Step 02 ]
Document review

Review of architecture diagrams, addressing plans, existing policies, maintenance contracts, and on-call procedures. We note what's documented, what's up to date, and what isn't. Integrator and remote maintenance contracts are examined as part of the supply chain.

[ Step 03 ]
Data collection under real operating conditions

OT asset inventory: PLCs, HMIs, supervision stations, network equipment, remote access. Data is collected through passive monitoring, with no queries sent to the PLCs, supplemented by interviews with the operations and maintenance teams. We compare what's documented against what's observed.

[ Step 04 ]
Gap analysis and zone segmentation

Zone and conduit segmentation under IEC 62443, then a requirement-by-requirement comparison between the target level and the level achieved. For NIS2, we cover governance, risk analysis, incident management, continuity, and supply chain security. For each point: criticality, remediation effort, and action owner.

[ Step 05 ]
Compliance plan and presentation

Remediation plan prioritized across three horizons: immediate, 6 months, 18 months, with compensating measures for equipment that can't be modified. Two presentations: one technical, with operations, the other for management, who carries the regulatory accountability.

What you receive

Gap report by requirement

The full survey, requirement by requirement, for IEC 62443 and for NIS2. Each gap is described, located on the installation, and tied to a risk level, a remediation effort, and an owner. Compliant points are documented too: they serve as evidence in the event of an audit.

Zones and conduits map

The zone and conduit segmentation diagram under IEC 62443, with the target security level per zone, authorized flows, and crossing points to control. The document is delivered in an editable format, ready to use afterward for your purchasing specifications.

Prioritized compliance plan

Actions sorted across three horizons, immediate, 6 months, and 18 months, each with the expected measure, estimated effort, department involved, and operating window required. Compensating measures are indicated for assets that can't be modified.

Evidence file and management summary

The OT asset inventory, survey records, and governance documents reviewed or drafted, brought together into a file that can be presented to an auditor or a client. A separate summary presents management with the residual risks and decisions to be made.

[ our case studies ]

Our case studies in
Regulatory Compliance (IEC 62443, NIS2)

Every industrial facility is different. Here are concrete examples of missions we have carried out, anonymized to respect our clients' confidentiality

Energy
Electricity Transmission

Cybersecurity Audit of a High-Voltage Substation Network

Full audit of 14 substations at 63 and 225 kV and their remote control network, conducted during normal operation, with no shutdown window.

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Water
Drinking Water Production and Distribution

OT Penetration Test on a Drinking Water Network's Supervision System

Penetration test conducted on the SCADA and remote management systems of a 12-site drinking water utility, on a pre-production test bench and during approved night windows, with no write commands sent to production equipment.

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test-intrusion-ot-supervision-reseau-eau-potable
Industry
Production

PLC and Network Audit for a Manufacturing Plant

Industrial cybersecurity audit on a manufacturing production site: 3 lines, around sixty PLCs, a flat OT network. Asset inventory, flow mapping, and prioritized remediation plan, with no operational downtime.

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audit-automates-reseaux-usine-production
Renewable Energy
Wind Power

Security Audit of a Grid-Connected Wind Farm

NIS2 gap analysis and zone and conduit segmentation on a 22-turbine wind farm, with a written breakdown of responsibilities between the operator, the manufacturer, and the maintenance provider.

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View all case studies

[ Help & support ]

Frequently asked questions

Can't find your answer here? We're available to talk about it. Tell us about your environment, constraints, and security challenges.

Nous contacter
Can a reinforcement consultant work without risk to production?

The consultant works under your operating rules, not their own. No action on production equipment is undertaken without the operator's approval and without going through your internal lockout and change management procedures.

For anything involving data collection on sensitive networks, the method stays the same as on our audits: traffic analysis from a mirror port, with no action on the process. Active testing is reserved for test environments, spare equipment, or planned shutdown windows.

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Does achieving compliance require stopping production?

No. The survey phase is done through data collection with no solicitation of field equipment, supplemented by interviews and configuration reviews. We work under real operating conditions, with no interruption to production.

Some actions in the remediation plan, however, will require a shutdown window: changing a network architecture or updating a PLC's firmware can't be done while running. That's precisely why the plan is split into three horizons: actions that require a shutdown are scheduled around your planned shutdowns, never imposed outside of them.

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Can the audit disrupt production?

No. The survey relies on traffic capture in listen-only mode, with nothing sent to the equipment: traffic is captured via a mirror port or a TAP, with nothing sent to the PLCs. No active scan, no query to a piece of field equipment is launched without your written approval and outside production hours.

Physical work in cabinets and racks is scheduled with operations, and someone from your side is present. If an action carries the slightest risk to the process, it's postponed or dropped.

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Can your presence on our installations disrupt production?

No. No action touches a live system without your approval and an agreed intervention window. Surveys are conducted through passive monitoring, with no queries sent to the PLCs.

Fixes that touch a PLC, a network, or a supervision system are scheduled around your shutdowns and carried out by your teams or your integrators. We prepare, we verify, we don't cut anything.

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Can the test cause a production shutdown?

The risk is never zero on an industrial network, and no one serious will tell you otherwise. That's exactly why the method is built around this constraint: during normal operation, with no shutdown window.

In practice, the discovery phase is done by analyzing traffic from a mirror port, with no action on the process. Active actions are planned with operations, governed by written stop conditions, and a member of your team stays reachable throughout the engagement. Anything that can't be run without risk is run on a test bench, on a spare PLC, or during a scheduled shutdown. Anything that remains too risky isn't run at all: the scenario is documented and its impact described, without being executed.

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We don't yet know whether our site is affected by NIS2. Is the training still useful?

That's actually the most common case. The first module is built to settle this point: Annex I and II sectors, size criteria, the case of subsidiaries and foreign groups. You leave with a written, justified qualification. We provide a technical and operational reading of the text, not a legal opinion: if your situation presents genuine ambiguity, it will need to be confirmed by your legal department or counsel.

Does production need to stop to train the teams?

No. The session is held in a classroom, with production maintained throughout, and no exercise is run on the production network. The setup adapts to shift changes: two identical sessions on the same day to cover two shift teams, or two spaced-out half-days. Control room positions stay staffed during the training.

Our PLCs are different brands depending on the workshop. Is the training still useful?

Yes. The content covers mechanisms common to all ranges: lack of authentication in industrial protocols, protecting the project and programming mode, account management on the HMI, filtering between zones. The training rig uses specific hardware to make the demonstrations concrete, then each measure is transposed onto the equipment present at your site. If your fleet is homogeneous, we align the training rig and configuration sheets with your main vendor.

Do you need to know automation to attend this day?

No. The day starts from the sensor and rebuilds the entire chain, with no assumed prior experience in PLC programming. The only useful prerequisite is general IT literacy: IP addressing and basic local network concepts. Your site's control engineers get value from it too, since the networks and protocols section covers points rarely addressed in vendor training.

Our teams have never opened the standard. Is the day still accessible to them?

Yes. No prior reading is required. The first module starts from the structure of the standard and the split of roles between operator, integrator, and vendor. What matters is knowledge of the installation: being able to read a schematic, and knowing the PLCs, links, and access points in service.

What's the difference with a standard IT staffing firm?

We don't place a generalist profile on an industrial need. The consultant we propose has already worked on control systems, knows the protocols involved, and understands what an availability constraint means on a live installation.

Another difference: the consultant isn't alone. They draw on the rest of the team for topics outside their scope, an architecture review or protocol analysis for instance, without changing your point of contact.

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How do we know whether NIS2 really applies to our company?

It depends on your sector of activity, your size, and the role you play in a critical chain. The national transposition specifies the categories of essential and important entities, and the obligations aren't identical for the two. Some of the operators concerned haven't yet been formally notified.

The first scoping step is used to settle this point, based on the evidence. If the applicable regime remains uncertain, we say so and tell you which obligations are worth putting in place regardless of classification.

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How much of our teams' time does the audit take up?

Concretely: a few hours to gather existing documentation, 45-minute to 2-hour interviews per contact (operations, maintenance, automation, IT), and someone accompanying us on site during the survey phases, mainly for access and safety.

The workload is concentrated in the survey week. The rest of the work happens off-site, and the presentation needs two slots: one technical, one for management.

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How often do you get involved?

The pace is set during scoping, based on the size of your fleet, the number of sites, and ongoing projects. The typical pattern combines a periodic review meeting, scheduled on-site days, and availability for one-off questions between meetings.

There's no single format: a site running in a stable regime and a multi-site group in the middle of a supervision migration don't have the same needs.

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What's the difference with an industrial cybersecurity audit?

An audit answers the question “where do we stand”: it covers the entire scope, architecture, configurations, and operating practices, and produces a complete assessment. A penetration test answers a different question: “how far can you go,” on a limited number of paths, with evidence.

The two complement each other, and the usual order is the audit first, then the test. A test launched with no prior knowledge of the installation costs time in discovery and needlessly increases operational risk.

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Who should we send? Our production managers aren't IT people.

There are no technical prerequisites. The day is designed for a mixed group: site management, production, maintenance, IT, compliance. It's actually the most useful setup, because the NIS2 scope gets decided at the intersection of these functions. A maintenance manager brings knowledge of the PLCs and integrator interventions that IT generally doesn't have.

Our operators have no IT background. Will the day be accessible to them?

Yes, that's exactly the intended audience. The day's thread starts from the process and the equipment participants handle: PLC, HMI, supervision station, network rack. Security concepts are introduced progressively, based on what they change in operations. An operator who knows their installation has more to contribute in modules 2 and 3 than an IT person who has never seen it.

Will we handle anything on our live installations?

No. All hands-on work happens on an isolated training rig brought by the instructor: PLC, HMI, supervision station, and network equipment. No action is taken on your production network, neither read nor write. The exercises that involve your actual installations are done on paper and on your diagrams.

What's the difference with the Industrial Cybersecurity Awareness training?

Awareness training is aimed at all site personnel and covers behavior: USB drives, fraudulent messages, reporting, physical access. It requires no technical background. This day is aimed at people who work on the systems or make decisions about them, and it goes into the actual workings of the equipment, networks, and protocols. The two are complementary and can be taken in that order.

Does the training lead to an IEC 62443 certification?

No. It's a hands-on practical training, not a certifying program. Participants receive a certificate of attendance and all the deliverables produced during the day. A personal certification comes from an accredited body, a product or process certification comes from a certification body.

Over what duration and at what pace is reinforcement available?

Assignments range from a few days a month on a specific topic to continuous presence over several months to hold a position. The pace is set during scoping and can be revised if your workload changes.

We prefer to state real availability rather than theoretical availability: if the requested profile isn't available for the period you want, we say so at the scoping stage.

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Is IEC 62443 a legal obligation?

No, IEC 62443 is a standard, not a regulation. It becomes binding when a client, an insurer, or a contract requires it, which is increasingly common in the energy sector and among large industrial operators.

Its value lies elsewhere: it provides the vocabulary and method that NIS2 lacks on the technical side. NIS2 requires appropriate risk management measures, IEC 62443 says how to structure them on a control system. The two work well together, which is what we do within a single assignment.

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Our documentation is out of date. Is that a blocker?

No, and it's actually the most common case. On an installation that's been running for fifteen or twenty years, the gap between the original diagrams and reality is one of the expected findings, not an obstacle.

Reconstructing the actual architecture is part of the assignment: it's often even the deliverable teams reuse the longest after the audit.

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Do you take control of our systems?

No. We don't operate your installations and we don't have permanent access to your industrial network. Our role is analysis, trade-offs, and preparing decisions, not running the plant.

When access is needed for a survey, it's named, time-limited, and logged, following your internal rules. The operations teams are involved at every step.

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Do we need to give you the schematics and access, or do you test blind?

On an industrial environment, a fully blind test yields little and carries a lot of risk. Without knowing the equipment present, a tester probes PLCs they shouldn't be touching.

We favor an informed approach: you provide the schematics, addressing plans, and inventory you have, and we check the gap against what's found on the ground. The “blind” part is kept where it makes sense, meaning at the starting point of the scenario, for instance from a standard office workstation with no special privileges.

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Is one day enough to make us compliant?

No, and we don't present it that way. One day lets you define the scope, measure the gaps, and write a prioritized plan. Implementation is a project measured in months: network segmentation, remote access management, PLC program backups, vendor clauses. The training gives you the framework and the order of the work. Depending on the gaps found, the next step is an industrial cybersecurity audit or long-term support.

Can we mix operators, maintenance, and supervisors in the same group?

Yes, and it's preferable as long as the group doesn't exceed 12 people. The three trades don't see the same signals: operations sees a setpoint drift, maintenance sees a piece of equipment restarting, supervisors see an unplanned contractor intervention. It's by comparing these observations that the reporting chain gets built. For a large headcount, it's better to split by shift team than by trade.

Our control engineers have no cybersecurity background. Will the day be too technical for them?

It's built for them. The prerequisite is knowing your installation, not knowing IT security. The necessary networking concepts are introduced over the course of the day, starting from the control system chain that participants have drawn themselves. Feedback shows the difficulty tends to run the other way: a participant coming from IT discovers the process's availability constraints.

Can we put the IT team and the control engineers in the same group?

It's actually the most useful setup. A good part of the difficulties we observe during audits comes from a shared vocabulary that covers different realities, and from operating constraints that IT isn't aware of. The exercises in modules 4 and 5 are designed to bring together profiles that rarely cross paths day to day. A mixed group of 10 to 12 people works well.

Can we work on our own schematics and addressing plans?

It's the format we prefer, because the workshops become directly useful. The documents are shared beforehand under a confidentiality agreement, used during the session, then returned or destroyed as you instruct. If they can't leave the site, the session is held at your premises, on your own workstations. A sample installation is available as a fallback.

Can the consultant work remotely?

Part of the work is done remotely: configuration analysis, documentation drafting, compliance file preparation, diagram review. Anything that requires seeing the installation, understanding an operating mode, or interacting with the field teams is done on site.

The split between on-site presence and remote work is set during scoping, and it takes your remote access rules for OT networks into account.

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Our PLCs are old and support neither authentication nor encryption. Can we be compliant anyway?

Yes. A significant part of the industrial fleet is built on equipment designed before security entered the specifications. No one expects it to be replaced immediately, and the standard accounts for this case.

The answer lies in compensating measures: isolating the PLC in a dedicated zone, strict filtering of the conduits leading to it, controlling maintenance access, monitoring traffic. The requirement shifts to the perimeter, not the equipment. These measures are documented as such in the report, along with the residual risk they leave.

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Our PLCs are old and can't be updated. Is the audit still worthwhile?

Yes, because the fix is almost never the patch. On a PLC that can't be patched or that's under a vendor contract, you act on what surrounds it: segmentation, flow filtering, removing unnecessary remote access, hardening engineering workstations, controlling USB drives and maintenance computers.

The audit tells you precisely which equipment can't be fixed, and which compensating measures reduce its exposure until it's replaced.

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Do you work with our integrators and manufacturers?

Yes, it's a significant part of the work. A good part of OT security issues plays out in specifications, installation acceptance tests, and remote maintenance conditions.

We review specifications, take part in technical meetings, and draft requirements verifiable on acceptance. We remain independent: we don't sell equipment or licenses and aren't tied to any vendor.

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Our PLCs aren't connected to the Internet. Is a test still worthwhile?

In practice, full isolation rarely holds up under scrutiny. The paths we find most often are remote maintenance access left open by an integrator, external contractors' laptops plugged directly into the industrial network, firmware update USB drives, 4G routers installed by an equipment vendor for its own monitoring, and production data servers that talk to both sides.

The test exists precisely to verify this assumption rather than take it for granted. For a substation operator, the assumed isolation was real on paper; a single engineering workstation shared between two zones was enough to bypass it.

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Can the training be held at our site, during full operation?

Yes. The day is held in a classroom at your site, without touching process availability. The exercises are based on your plans, your inventories, and your organization, not on handling equipment. If you'd like, a short visit to the control room or a technical area can be included in the early afternoon, respecting your access rules and prevention plan. We keep the group at 8 to 12 participants: beyond that, the small-group exercises lose their value.

Is this generic content, or is it adapted to our installation?

Modules 1, 4, and 5 follow a common thread, illustrated with anonymized cases from audits on comparable installations. Modules 2 and 3 are built around your site, based on a preliminary discussion with the operations manager: architecture diagram, type of PLCs and supervision, list of remote access and contractors. It's your architecture that gets drawn on the board, not an example.

Can we work on our own architecture during the training?

It's the format we recommend. We ask beforehand for your schematics, your addressing plan, and the list of your remote access, under a confidentiality agreement. The zone segmentation and hardening exercises then work on your own installation, and the remediation plan produced at the end of the day is directly usable. Failing that, we work on a sample case close to your sector.

Does the training touch our production equipment?

No. All hands-on work happens on the training rig brought by the instructor, isolated from your network. The traffic captures and diagrams used in the exercises come from real assignments and are anonymized. If the day is held on your site, an installation visit can be arranged at the end of the program, for observation only, with the agreement of operations and under their supervision.

Should control engineers and IT staff be mixed in the same group?

Yes, it's the most useful format. Zone segmentation is decided between those who run the process and those who run the network, and the day is also meant for that confrontation. We limit the group to 12 people so the workshops stay manageable. Beyond that, we split the session in two.

What happens at the end of the assignment? Will we become dependent on you?

No, and the setup is built to avoid it. The operations teams are involved at every step, documentation is produced as the assignment progresses rather than at the end, and a handover is organized with the people taking over the topics.

If you'd like to keep a connection after the consultant leaves, that falls under our long-term support and expertise offer, not an automatic extension of the reinforcement.

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Once the plan is delivered, is compliance achieved for good?

No, and it needs to be said clearly: compliance isn't a permanent state. A line extension, a new integrator, a supervision change, or an update to the standard call part of the file back into question. NIS2, in fact, requires an ongoing approach, with incident management and risk review over time.

What the assignment leaves you with is a reusable foundation. You stay in control: the report, flow diagrams, and configuration files remain usable in-house after the assignment. Your teams can update the zone segmentation and the evidence file without starting from scratch. If you'd prefer long-term support, that's the purpose of our long-term support and expertise offer.

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What happens after the report? Do we have to go through you for the fixes?

No. You stay in control: the report, flow diagrams, and configuration files remain usable in-house after the assignment. Your teams or your regular integrator can handle the remediation plan without us.

If you'd like support to drive the actions, follow up with vendors, or prepare a compliance program, that falls under our long-term support engagements, and it's decided after the report, not before.

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What happens if we stop the engagement?

You carry on without us. You stay in control: the report, flow diagrams, and configuration files remain usable in-house after the engagement. Nothing is locked into a tool you can't access.

The goal, in fact, is to build your teams' autonomy on the subject, not to create a dependency.

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Is a penetration test enough to address NIS2 or IEC 62443?

No, and it needs to be said clearly. NIS2 requires risk management, technical and organizational measures, governance, and incident notification capability. IEC 62443 requires zone and conduit segmentation, target security levels, and component-level requirements. No penetration test covers all of that on its own.

That said, the test feeds into these efforts: it provides evidence of the effectiveness of measures in place, it documents the attack scenarios used in the risk analysis, and it gives the compliance file a factual element rather than a declarative one. It's part of a compliance program, not a replacement for one.

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Do the documents produced during the day stay usable afterward? What if the regulation changes?

All the working materials are delivered in editable format: qualification grid, OT asset inventory template, Article 21 gap matrix, early-warning template, three-horizon plan table. They're designed to be picked up and updated by your teams. The day's content is revised with every update to the national transposition and implementing texts, and we flag during the session the points still likely to change, so you don't build your plan on an unstable reading.

Is this training enough to address NIS2?

No, and it needs to be said clearly. Staff awareness is one of the expected measures, but not the only one: governance, incident management, supply chain control, and technical measures require separate work. The session provides the elements to add to your file: detailed program, list of participants, attendance certificate, rules sheet drafted on site. The rest relies on an audit and a three-stage roadmap, from the immediate fix to the investment plan.

What's the difference with your OT Systems Technical Fundamentals and IEC 62443 in Practice trainings?

Technical Fundamentals lays out the OT landscape as a whole and is aimed at a broader audience, including non-technical staff. IEC 62443 in Practice covers the standards-based approach and its application at the scale of a site or an organization. This one focuses on a single subject, the control system, and on the configuration steps that protect it. The three follow in that order, but each can be taken independently.

What does the team come away with after the day, and what should come next?

Each participant leaves with the full course materials, the asset inventory template, the intervention checklist built during the session, and the captures used in the exercises. A certificate of completion is given to each participant, and a session summary is sent to the training manager. The logical next step depends on your needs: IEC 62443 in Practice for architecture and compliance, NIS2 for the regulatory side, or an audit if the goal is to establish the actual state of an installation.

What should we do once the day is over?

The segmentation produced in the workshop is a starting point, not a compliance file. The usual next step is a survey of the installation to compare that segmentation against the actual flows, under real operating conditions, through data collection with no solicitation of field equipment. Your teams can also carry on alone: the files and templates remain usable in-house.

[ our other services ]

Our other industrial cybersecurity expertise

Industrial Cybersecurity Audit

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OT Penetration Testing

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Regulatory Compliance (IEC 62443, NIS2)

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Long-Term Support and Expertise

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OT Cybersecurity Consultant Reinforcement

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From the initial audit to long-term support, we cover the full cycle of securing your industrial systems. Every engagement is tailored to your environment and operating constraints

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