Introduction



Our client is looking for a Senior Security Consultant to deliver across Critical National Infrastructure (CNI) and Operational Technology (OT) environments.



The ideal candidate will come from industry or a similar consultancy environment, having lead risk assessments, security governance, and client delivery across projects within an OT environment, ideally CNI or Defence.




Working Patterns and location - Hybrid - 2 days on site per week




Key responsibilities



• Lead and deliver risk assessments, security governance, and tailored security controls for clients across Defence, CNI, and OT environments.



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



• Manage multiple concurrent projects, balancing client and business priorities to tight deadlines.



• Mentor and support junior consultants, driving continuous improvement across the security team.



• Contribute to business development, proposals, and building strong client relationships.



• Communicate cyber security risks and recommendations clearly to technical and non-technical stakeholders.



• Apply creative, innovative thinking to solve complex and non-routine security challenges.




Skills & experience



• Experience delivering technical cyber security consultancy in complex, multi-disciplined environments.



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



• Experience delivering cyber security consultancy in OT or ICS environments, such as energy or utilities.



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



• Strong understanding of Secure by Design principles and methodology.



• Experience working with MoD security policies such as JSP440 and JSP604 would be of benefit.



• Excellent communication skills with the ability to engage stakeholders at all levels.



• Relevant professional certifications such as CISSP, CISM, CCSP, CISMP, or Chartered Cyber Security




Our clients Offer a range of benefits for permanent workers. As well as an excellent salary you will receive the following:



• 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!



(c) Copyright Datasource Computer Employment Limited 2026.