OT Security Compliance Consultant – IEC 62443

Contract / Interim

📍 UK-based | Remote

⏳ Initial duration: 6–8 weeks (extension highly likely)

🔐 Active SC clearance required

Context & Objective

We are supporting a critical public-sector programme requiring immediate reinforcement of OT cybersecurity compliance. This interim consultancy role focuses on the review, restructuring and alignment of a Cyber Security Management System (CSMS) for Industrial Automation and Control Systems (IACS), in line with IEC 62443.

The engagement is driven by a regulatory action and operates against non-negotiable deadlines, making this a hands-on, delivery-focused role for an experienced OT security professional who can operate autonomously and with confidence.

Your Role

As an OT Security Compliance Consultant, you will take ownership of reviewing and reworking an existing CSMS framework to ensure alignment with IEC 62443 requirements. You will operate at a mid-to-senior delivery level, with direct stakeholder access and minimal oversight.

Key Responsibilities

• Review and restructure the existing Cyber Security Management System (CSMS) for IACS environments
• Ensure full alignment with IEC 62443 principles and controls
• Assess existing OT security policies and documentation, identifying gaps and remediation actions
• Support the completion of CSMS documentation within a fixed regulatory deadline
• Define and structure a pragmatic audit schedule aligned to IEC 62443 expectations
• Provide clear, actionable input to support compliance readiness
• Work independently, reporting progress and risks directly to the engagement lead

Required Experience & Skills

• Strong background in OT / IACS cybersecurity
• Practical, hands-on experience with IEC 62443 (not theoretical only)
• Experience working with CSMS frameworks in operational environments

Either:

• an OT/IACS security specialist, or
• a senior IT security professional with proven, hands-on OT exposure
• Comfortable working autonomously under time pressure
• Able to deliver structured, regulator-ready outputs

Logistics & Contract Details

• Contract / interim engagement
• UK-based candidates only
• Remote working
• Active SC clearance is mandatory
• Target start date: week commencing 12 January
• Initial duration: ~6–8 weeks (to early March), with strong likelihood of extension

Why This Role Is Attractive

• Direct involvement in a nationally critical OT security programme
• Hands-on application of IEC 62443 in a real operational context
• High-impact, short-term engagement with clear outcomes
• Strong potential for follow-on work across OT risk, audit and resilience programmes
• Opportunity to position yourself as a trusted OT compliance specialist for future engagements