Introduction

Our client are a large Defence and critical national infrastructure consultancy looking for a Senior Cyber Security Consultant with a strong background in Defence or CNI/OT environments to join their growing security consultancy team.

You'll need hands-on experience delivering technical cyber security work across complex, regulated environments. They have positions available across GRC, Security Architecture, Threat and Vulnerability, and OT teams.

Working Patterns and location - Hybrid - 2 days on site per week in Bristol or London

Key responsibilities

• Lead and deliver risk assessments, security governance, and tailored security controls for clients.

• Provide expert cyber security advice across Aerospace, Defence, and CNI/OT environments.

• Develop, review, and maintain security policies, procedures, and compliance artefacts.

• Manage multiple client projects concurrently, balancing priorities and meeting tight deadlines.

• Mentor and support junior consultants, sharing knowledge and driving continuous improvement.

• Communicate cyber security concepts clearly to both technical and non-technical stakeholders.

• Contribute to business development activities including proposals and client engagement.

• Apply innovative thinking to solve complex, non-routine security challenges across people, process, and technology.

Skills & experience

• Proven experience delivering technical cyber security consultancy in multi-disciplined environments.

• Strong background in information assurance, including ISMS development and risk assessments.

• Experience in UK Defence, including knowledge of JSP440, JSP604, JSP453, and the Security Policy Framework.

• Experience delivering security assurance and accreditation for Defence capabilities or OT/ICS environments.

• Solid understanding of Secure by Design methodology and relevant security frameworks.

• Strong written and verbal communication skills with the ability to engage stakeholders at all levels.

• Ability to manage multiple projects independently within a matrix organisation.

• Willingness to travel across the UK and occasionally overseas as project needs demand.

The client would also like to see some of the below, but this is not essential:

• Professional certifications such as CISSP, CISM, CCSP, CISMP, or Chartered Cyber Security Professional.

• Experience with SCADA, PLC, and RTU systems and their integration with corporate IT networks.

• Familiarity with OT cyber security standards including IEC 62443, NIST CSF, NIS Regulations, or HSE OG-0086.

• OT-specific qualifications such as GICSP or IEC/ISA 62443 certification.

• Membership of a recognised security professional body such as CIISEC, IISP, BCS, or ISC2.

• Experience selecting and deploying appropriate security technology in live CNI or OT environments.

Additional benefits

• Pension up to 10% client contribution.

• Life assurance, income protection insurance and critical illness cover.

• Option to buy & sell holiday.

• Dental, health, medical, travel and gadget insurance.

• 24/7 Digital GP.

Our client is committed to providing a diverse and inclusive workplace and welcomes applications from all backgrounds.

Part-time opportunities/flexible working is available to suit individual needs.

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You will be required to hold a minimum of DV Clearance. If you do not hold an active DV Clearance, please familiarise yourself with the vetting process before applying.

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