Circle Group

Circle Group

Milton Keynes, East of England

OT / ICS Cyber Assurance Lead - UK Remote

Full-Time£100,000 - 100,000 per yearhierUnited Kingdom
IT

Job Description

Salary: £100,000 - 100,000 per year

Requirements:
  • 10+ years experience in cyber security, with substantial specialist experience in OT/ICS.
  • Extensive hands-on OT/ICS security assessment experience in operational environments.
  • Strong understanding of OT/ICS architectures, industrial networks and protocols.
  • Working knowledge of IEC 62443 and relevant OT security standards.
  • Experience leading technical teams and developing senior consultants.
  • Proven involvement in sales, bids, proposals and commercial engagements.
  • Experience developing cyber security propositions, services or practice areas.
  • Ability to engage confidently with engineers, security professionals, CISOs and executive stakeholders.
  • Commercial understanding covering pricing, utilisation, profitability, pipeline and delivery.
  • Recognised certification such as GICSP, GRID, IEC 62443 or equivalent.
  • Ability to obtain and maintain SC clearance.
  • Full UK right to work and unrestricted ability to work across private, enterprise and government clients.
  • Desirable: engineering, process control or industrial automation background.
  • Desirable: OT SOC, detection and monitoring experience.
  • Desirable: sector experience across energy, utilities, maritime, manufacturing or CNI.
  • Desirable: experience building a new OT/ICS service line from an early stage.
  • Desirable: experience driving cross-sell from wider cyber services, including ISO 27001, cyber assurance or assessment services.
  • Desirable: experience with SCADA, DCS, PLC and industrial protocols such as Modbus, DNP3, OPC, PROFINET or EtherNet/IP.
Responsibilities:
  • Own and develop the OT/ICS Cyber Assurance proposition, methodology and safety-first testing standards.
  • Build and grow a team of consultants and pod leads, setting technical direction, career pathways and certification plans.
  • Develop new OT/ICS products and services, identifying opportunities for growth and cross-sell.
  • Lead major OT/ICS security programmes across manufacturing, CNI, energy, utilities, maritime and other operational environments.
  • Support and lead bids, proposals, pricing and commercial strategy.
  • Develop the labs, tooling and reference environments required for safe OT/ICS testing.
  • Maintain hands-on involvement in client engagements and retain strong technical credibility.
Technologies:
  • Ethernet
  • Support
  • PLC
  • Profinet
  • Security
  • Hardware
  • Network

More:

We are an established cyber security organisation with a strong, high-performing capability, significant customer reach and the resources to scale quickly. This UK remote opportunity offers genuine ownership of an OT/ICS Cyber Assurance practice, with the chance to shape its strategy, technical direction and commercial growth across manufacturing, CNI, enterprise and government customers. This is a senior role for someone who enjoys building businesses, combining consulting leadership with commercial responsibility and the autonomy to develop a substantial OT/ICS proposition.

last updated 39 week of 2026

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About Circle Group

Circle Group

Circle Group

Milton Keynes

IT

Skills & Technologies

GoRESTAIUI

Inferred from job description

Salary Insight

£100,000

This role

£85,000

UK median

This salary is 18% above the UK median for Lead roles (£85,000/yr).

Based on 2024–2025 UK technology sector benchmarks

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