Hiring: Senior Information Technology Developer in Peterborough

Job Description SENIOR INFORMATION ASSURANCE ENGINEER
LOCATION - HUNTINGDON, UK
CLEARANCE - HIGH - DV
UNLEASH YOUR POTENTIAL

At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers success.
We empower our teams in the UK to address some of the most complex problems in defence, government, safety and security, and transportation. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community.
We are seeking an experienced Senior Information Assurance Engineer to join our growing Cyber Security team, supporting customer programmes across the Defence, Intelligence, Logistics, and National Security sectors within the UK.
This is an opportunity to lead practical, proportionate security assurance across complex UK programmes, helping customers manage risk while enabling successful delivery.
As a Senior Information Assurance Engineer, you will shape assurance strategy, support risk-based decision making, and work closely with customers, suppliers, and multidisciplinary delivery teams to embed security throughout the project lifecycle.
You will also drive the continued maturity of our security assurance capability, including NIST-aligned risk assessment methods, assurance processes, tooling, and reporting that improve consistency and visibility across programmes.
You will be part of a wider UK cyber community, working alongside Information Assurance, Security Architecture, Security Engineering, and Security Monitoring specialists to deliver security by design and continually raise cyber security standards.

Huntingdon, Cambridgeshire - minimum 4 days per week onsite (alternative arrangements by exception and subject to agreement with the Cyber Security Lead).

Willingness to undertake occasional travel across the UK, including London and customer sites, as required.

Essential Skills and Experience

Proven experience delivering Information Assurance, risk management, and security assurance within Defence, Government, Intelligence, or other highly regulated environments.

Strong understanding of NIST RMF/CSF, ISO 27001, and Government security frameworks, with experience developing assurance artefacts such as SyOPs, RMADs, Security Impact Assessments, risk assessments, and accreditation evidence.

Conduct risk assessments and assurance activities using recognised frameworks including NIST RMF, NIST CSF, and ISO 27001.

Develop, review, and maintain assurance artefacts including SyOPs, RMADs, Security Impact Assessments, Security Management Plans, risk assessments, and governance documentation.

Lead incident response capability development, including response plans, playbooks, testing, exercising, and Tabletop Exercises (TTXs).

Manage vulnerability, risk, audit, control assessment, and compliance activities, ensuring findings are prioritised and driven through to resolution.

Engage customers, suppliers, and senior stakeholders with clear risk advice, assurance reporting, and evidence-based recommendations.

Provide leadership, mentoring, and guidance to assurance practitioners and wider project teams.

Favourable If You Have

Experience working within MOD, Home Office, National Security, or other Government environments.

Experience leading the implementation of security, assurance, or risk management changes across complex operational or project environments.

Technology Skills

Strong understanding of enterprise security architectures and controls, including network security, secure boundaries, endpoint protection, IDS/IPS, SIEM, identity and access management, PKI, LDAP, Active Directory, SAML, encryption, and key management.

Experience interpreting outputs from vulnerability assessments, penetration testing, IT Health Checks (ITHCs), and se