Principal Cyber Security Consultant

Ref: ZR_9420_JOB  ·  Posted on 15 May 2026

Introduction

Company cultures & job summary

 

Our client is looking for a Principal Cyber Security Consultant to work across Aerospace, Defence and CNI/OT environments.

 

You'll need a solid background in information assurance, risk assessments and security governance, ideally with experience in either the UK Defence sector or OT/ICS environments.

 

This is a great opportunity to take your cyber career to the next level, working on projects that genuinely matter to national security.

 

 

Working Patterns and location – Hybrid – 2-3 days per week on site in London, Bristol or Manchester (Other offices are available so please ask if your location isn’t listed)

Key responsibilities

·        Provide expert cyber security advice and guidance across a range of client environments.

·        Lead risk assessments, security governance activities and deployment of tailored security controls.

·        Develop, review and maintain security policies, procedures and artefacts to ensure compliance.

·        Manage multiple concurrent projects, balancing client and business priorities effectively.

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

·        Contribute to business development by identifying opportunities and supporting proposals.

·        Build and maintain strong relationships with clients, stakeholders and team members.

·        Champion continuous improvement within the security team and support junior colleagues.

Skills & experience

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

·        Strong background in information assurance, including developing ISMS and conducting risk assessments.

·        Experience deploying and managing security controls aligned to business risk appetite.

·        Solid understanding of Secure by Design methodology and its practical application.

·        Excellent written and verbal communication skills with experience engaging stakeholders at all levels.

·        Strong organisational skills with a track record of managing multiple projects simultaneously.

·        Experience in the UK Defence sector with knowledge of MoD security policies such as JSP440 and JSP604.

·        Ability to deliver quality security outcomes under pressure and to tight deadlines.

 

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

·        Relevant professional certifications such as CISSP, CISM, CISMP or ISO27001.

·        Experience conducting security assurance and accreditation activities for Defence capabilities.

·        Experience segmenting and securing OT/ICS networks in CNI environments such as energy or utilities.

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

·        OT cyber security qualifications such as GICSP or IEC/ISA 62443.

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

 

Additional benefits

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.

 

·        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.

 

 

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.

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