Information Assurance Security Engineer

Leidos is seeking a Cyber Security and Information Assurance Engineer to support a key national security programme. The role is responsible for implementing, monitoring, and maintaining security measures across complex systems, providing subject matter expertise within the Information Security Management (ISM) function, and ensuring risks to Confidentiality, Integrity, and Availability are effectively managed.

The engineer will contribute to security strategy, policy, and procedural development, act as a point of contact for client security assurance activity, and work closely with the ISM lead, programme suppliers, and technical teams.

Success requires strong technical proficiency, independent delivery capability, and a clear understanding of evolving cyber threats and security assurance practices.

What will I be doing?

• Deliver day to day IT security objectives and lead assigned projects or assurance activities.
• Integrate cyber assurance into multiple delivery methodologies (Agile, Waterfall, SAFe, Incremental, DevOps).
• Act as a point of contact for client security teams on assurance matters.
• Conduct vulnerability assessments, ITHCs, incident response activities, and evaluate responses to system security requirements.
• Support accreditation and continuous assurance using recognised risk frameworks (ISO, NIST) and structured analysis methods.
• Maintain and develop ISMS documentation and security artefacts (SyOPS, RMADS, Security Management Plans).
• Contribute to the analysis of system security weaknesses and communicate findings to programme leads and engineering teams.
• Understand security monitoring tools, logs, alerts, and protective monitoring systems (e.g., SIEM/SOC).
• Maintain the Information Security Risk Register and coordinate monthly vulnerability management activities, ensuring remediation is tracked, reported, and aligned with the Security POAP.
• Support delivery of contracted service levels and participate in security governance forums such as Security Working Groups.
• Assist with security policy development, cryptographic assurance, audit support, and compliance with regulatory and client standards.

• Proven cybersecurity or information assurance experience.
• Proficiency with common security tools (firewalls, IDS/IPS, antivirus, SIEM).
• Familiarity with frameworks such as NIST, CIS, OWASP, ISO 27001.
• Strong understanding of cybersecurity principles, CIA, risk management, and incident response.
• Experience across the systems engineering lifecycle and its supporting processes.
• Hands on experience with ITHC management, vulnerability assessment, and security assurance.
• Familiarity with accreditation processes for secure/sensitive systems.
• Experience maintaining security documentation sets (SyOPS, RMADS, ISMS elements).

Practical understanding of:

• Network and boundary protection technologies (firewalls, gateways, IDS/IPS, diodes).
• Protective monitoring systems (SIEM/SOC).
• Authentication and authorisation (PKI, LDAP, SAML).
• Encryption principles and secure communications.

Communication and Professional Skills

• Strong written and verbal communication skills, able to work with both technical and nontechnical stakeholders.
• Ability to produce clear assurance reports and documentation for varied audiences.
• Good commercial awareness and adherence to project and service disciplines.
• Effective collaboration across engineering, delivery, and client teams.

At Leidos we are PASSIONATE about customer success, UNITED as a team and INSPIRED to make a difference. We offer meaningful and engaging careers, a collaborative culture, and support for your career goals, all while nurturing a healthy work-life balance. We provide an employment package that attracts, develops and retains only the best in talent. Our reward scheme includes:

• Contributory Pension Scheme

• Private Medical Insurance

• 33 days Annual Leave (including public and privilege holidays)

• Access to Flexible benefits (including life assurance, health schemes, gym memberships, annual buy and sell holidays and a cycle to work scheme)

• Flexi-Time Working, Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Leidos UK & EUROPE - we work to make the world safer, healthier, and more efficient through technology, engineering and science. Leidos is a growing company delivering innovative technology and solutions focused on safeguarding critical capabilities and transformation in frontline services, our work in the United Kingdom includes addressing some of the most complex problems in defence, healthcare, government, safety and security, and transportation. What Makes Us Different: Purpose: you can use your passion and abilities at Leidos to keep the people you care about safe. We are at the forefront of machine learning, AI, cyber security and solutions. Using your skills in the technology frontline by helping to build a safer world. You can inspire change. Collaboration: having flexibility to do your job is one of our core benefits, enabling you to become part of our extraordinary team. We have been empowering our people to work flexibly for years. Whether you work from home, the office or on customer sites, we will give you the digital tools and the flexibility to work smarter and align your needs and ours. People: Leidos empowers people from every background to be themselves and gives you the tools to learn new skills by enabling growth whilst developing. We believe that extraordinary people need opportunities to grow, to be inspired and to inspire others. At Leidos, we invest in technical academies, career rotations and a career development plans that enhance your future. If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares., Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.