Senior Cyber Security Consultant

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. RECOMMEND A FRIEND: If you have professional friends/colleagues who would be interested in one of our roles and our excellent levels of service too, we’d like to recognise your recommendations with a ‘thank you’ of our own. For every friend you refer who then starts a role through Datasource either Contract or Permanent, we will send you £200 of Love to Shop Gift Vouchers & gift your friend £100 in Love to Shop Gift Vouchers as well! 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. (c) Copyright Datasource Computer Employment Limited 2026.