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SIGAM Operational Technology Security Services
Practical support for the systems behind your production, facilities and supply commitments. Start with your requirement, understand the risks and agree the right specialist skills through a UK-managed SIGAM engagement.
A clear starting point
What is driving your OT security review?
Perhaps a customer has asked for evidence that your production systems are protected. You may be reviewing remote maintenance access, running unsupported controllers or trying to understand where responsibility sits between IT, engineering and an equipment supplier.
SIGAM offers an initial consultation to clarify the problem, the operational constraints and the outcome you need. We can then scope a risk review, an improvement roadmap or a defined implementation project around your environment.
You work with SIGAM
SIGAM is your contracting and delivery organisation, with UK management and a clear point of accountability. We assemble and manage the specialist skills appropriate to the agreed work.
Technical suitability, resource availability, site arrangements, timescales and fees are confirmed before an engagement is committed.
Support shaped around your environment
From visibility to practical risk reduction
Define the requirement
Discuss critical processes, business concerns, affected locations and the reason for the review. Identify the people and equipment suppliers who need to contribute.
Potential output: a clear scope, objectives and evidence request.
Understand your OT estate
Review inventories, diagrams, device support status, ownership and known connections. Identify gaps in visibility using methods agreed with operations and engineering.
Potential output: an asset and connectivity baseline, with unknowns clearly recorded.
Review security posture
Examine IT/OT boundaries, remote and vendor access, account management, configuration practices, monitoring and recovery arrangements against your operational risks.
Potential output: prioritised findings, business implications and evidence limitations.
Discuss compliance gaps
Work through a customer questionnaire, contractual security requirement or agreed framework. Separate missing controls from missing evidence, and identify where legal scope needs confirmation.
Potential output: a gap summary and practical evidence plan.
Prioritise the next steps
Build a proportionate improvement plan around criticality, cost, equipment constraints and maintenance windows. Include interim controls where replacement or patching must wait.
Potential output: agreed priorities, dependencies, owners and indicative sequencing.
Deliver an agreed scope
Where the requirement and skills are confirmed, scope practical changes such as access controls, segmentation, boundary hardening, documentation or recovery preparation.
Potential output: approved changes, validation evidence and handover documentation.
These are examples of work we can discuss and scope. Deliverables, exclusions and acceptance criteria are agreed for each engagement; an initial conversation does not commit you to a full implementation programme.
A controlled route forward
Agree the work before touching the process
- Discover & scopeYour concern → critical processes → evidence → suitable specialist skills
- Review & prioritiseFindings → practical options → operational constraints → an agreed roadmap
- Implement & verifyApproved changes → planned testing → documented handover → review
Protect safety and uptime
Reviews begin with information gathering and operational discussion. Any active discovery, testing, configuration change or installation must be specifically agreed, with appropriate engineering input, equipment compatibility checks and a safe change window.
We agree access permissions, site rules, escalation contacts and rollback arrangements before technical work starts. An IT security tool is not assumed to be suitable for a production controller.
Keep decisions practical
A useful review should help you decide what to do next. That might be closing an unused remote connection, improving access records or planning a network boundary—not replacing every machine.
Where a device cannot be changed safely, the discussion can focus on protection around it, the residual risk and when the decision should be reviewed. Read our OT risks, security and compliance guide for the wider context.
Supplier assurance and compliance
Turn broad requests into a defined piece of work
“We need to be NIS2 compliant” may describe several different needs: direct legal obligations, a customer’s supplier standard or a general concern about resilience. The first task is to establish which applies, what evidence is expected and who will accept it.
Bring the actual requirement
Share the relevant questionnaire or contractual wording through an agreed secure route. Tell us the deadline, responsible customer or regulator, affected sites and what has already been assessed.
We can scope a technical gap discussion and evidence review against the agreed requirements, with legal interpretation confirmed by your adviser where needed.
Keep the outcome precise
A risk review or improvement roadmap is not a certification, legal opinion or guarantee of compliance. SIGAM does not issue ISO 27001, Cyber Essentials or NIS2 certifications.
NIS2 is EU legislation and does not automatically apply to every UK business. UK duties and contractual obligations must be assessed separately. Read the legal and supply-chain distinctions.
Before we speak
A few details will help us make the conversation useful
- The process or equipment you are concerned about, and the sites involved.
- The trigger: customer assurance, an audit, legacy equipment, remote access or a planned change.
- Any known operational constraints and who owns engineering and IT decisions.
- Your deadline and whether you want advice, a review or help delivering changes.
Start with a brief overview
Use our existing contact form to describe the requirement. Please do not include passwords, detailed network diagrams or sensitive system information in the initial enquiry. We can agree an appropriate route for supporting material.
Can we start with a consultation rather than a large project?
Yes. We can begin by clarifying your concerns and deciding whether a focused review is useful. Scope and fees for any subsequent work are agreed before it starts.
Can SIGAM help with on-site work?
Tell us the location, equipment and site requirements. We will confirm the suitable skills, access arrangements and availability as part of scoping, rather than assuming every engagement can be delivered remotely.
Do we need to replace all our legacy equipment?
That depends on the risk and the available controls. A review can consider segmentation, restricted access and other compensating controls alongside supported upgrades or replacement. Engineering and equipment-supplier input remains essential.
Tell us what your operation needs to protect
Talk to SIGAM about an OT risk review, customer assurance request or practical improvement project. We will discuss the requirement and agree the right next step.
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