OT / ICS Cyber Assurance Lead - UK Remote

Circle Group; Milton Keynes; Remote; GBP 90,000 - 110,000; Full time

Job summary

Circle Group in the United Kingdom seeks a senior OT/ICS cyber security leader to own the proposition, methodology and testing standards across manufacturing, energy, utilities and government clients. You will build a team of consultants, set technical direction, career pathways and certification plans, while retaining hands-on involvement in client engagements.

This remote UK role offers ownership, strategic impact, and opportunities to shape the OT/ICS practice and cross-sell wider cyber

Qualifications

• 10+ years in cybersecurity with OT/ICS focus.
• Hands-on OT/ICS security assessments in operational environments.
• Experience selling and delivering cyber propositions.
• Ability to obtain UK SC clearance.

Responsibilities

• Own and develop OT/ICS Cyber Assurance proposition and testing standards.
• Build and grow a team of consultants and pod leads.
• Develop new OT/ICS products and services and cross-sell opportunities.
• Lead major OT/ICS security programmes across industries.

Skills

OT/ICS security

team leadership

sales & bids

stakeholder engagement

commercial growth

Education

GICSP

GRID

IEC 62443

Tools

SCADA

DCS

PLC

Modbus

DNP3

OPC

Profinet

EtherNet/IP

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 40 week of 2026