Senior Security Principal, Identity Security

KBR Careers; Leatherhead; On-site; GBP 110,000 - 140,000; Full time

Job summary

KBR, a world-leading engineering and technology company, seeks a Senior Security Principal, Identity Security to shape identity security strategy, governance and engineering across large, regulated environments. You will lead IAM design, implement secure identity solutions and drive cross-functional security initiatives with stakeholders.

Responsibilities include overseeing Entra ID, Active Directory and modern authentication, and guiding transformation programmes while ensuring compliance and

Qualifications

• Extensive experience in identity and access management and security architecture.
• Leader of IAM initiatives and architecture reviews in large organisations.
• Proven ability to influence security outcomes across complex environments.

Responsibilities

• Define and drive identity security strategy and governance.
• Design, implement and support enterprise IAM solutions.
• Guide security architecture across hybrid, on-prem and cloud environments.
• Collaborate with stakeholders across cybersecurity, infrastructure and applications.

Skills

Microsoft Entra ID

Active Directory

Identity & Access Management

Hybrid Identity

Privileged Access Management

Authentication Technologies

Education

Bachelor's degree in Cybersecurity/IT/CS

Tools

Microsoft Entra ID

Active Directory

Microsoft Sentinel

Microsoft Defender XDR

SAML/OIDC

PKI/Certificate Services

Job description

Title: Senior Security Principal, Identity Security

A career at KBR can change the world — and change your life. If you're ready, let's get started. The KBR team of teams delivers future-forward science, technology and engineering solutions and mission-critical services that help governments and companies around the world accomplish their most important objectives, while also helping achieve their sustainability goals.

KBR is seeking a Senior Security Principal, Identity Security to serve as a senior technical authority within our global cybersecurity organisation. In this principal-level role, you will help define and drive identity security strategy, architecture, governance, and engineering excellence across complex, highly regulated enterprise environments. You will lead initiatives spanning Microsoft Entra ID, Active Directory, hybrid identity, privileged access management, identity governance, authentication technologies, workload identities, and certificate services.

Working closely with cybersecurity, infrastructure, cloud, application, and business stakeholders, you will design and implement secure identity solutions that reduce risk, strengthen access controls, and support enterprise transformation programmes.

Education & Experience

Bachelor's degree in Cybersecurity, Information Technology, Computer Science, Information Systems, Engineering, or a related discipline, or equivalent relevant experience and qualifications. Extensive experience in identity and access management, identity security, cybersecurity engineering, security architecture, or a related field. Proven experience designing, implementing, and supporting complex enterprise IAM environments. Experience leading identity security initiatives, architecture reviews, and transformation programmes within large-scale organisations. Strong track record of influencing security outcomes across complex enterprise environments.

Technical Skills

Deep expertise in Microsoft Entra ID, Active Directory, and hybrid identity environments. Strong knowledge of identity governance, privileged access management, Conditional Access, and modern authentication technologies. Experience with federation, single sign-on, application identity, and identity lifecycle management. Strong understanding of MFA, FIDO2, Windows Hello for Business, certificate-based authentication, SAML, OAuth, and OpenID Connect. Knowledge of PKI, certificate services, trust models, and certificate lifecycle management. Experience investigating identity security incidents and leveraging Microsoft Sentinel, Microsoft Defender XDR, Microsoft Defender for Identity, or equivalent platforms.

Strong stakeholder engagement, communication, problem-solving, and technical leadership capabilities. Ability to lead strategic initiatives and influence cross-functional teams.

Due to the nature of the work and customer requirements, applicants must be eligible to obtain and maintain the appropriate UK security clearance.

In September 2025, KBR announced the planned separation of its Mission Technology Solutions business into an independent public company. This role will ultimately become part of the new organisation, which partners with government, defence, intelligence, space, aviation, and critical infrastructure customers to deliver advanced engineering, technology, and mission support solutions.

KBR is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, colour, religion, disability, sex, sexual orientation, gender identity or expression, age, national origin, veteran status, genetic information, union status and/or beliefs, or any other characteristic protected by federal, state, or local law.

KBR — Delivering Solutions, Changing the World.

KBR brings together the best and brightest to deliver science, technology and engineering solutions that help governments and companies around the world accomplish their most critical missions and objectives.

KBR Values

• We Value Our People – We create diverse, inclusive environments in which each person can feel safe, respected and valued, and where everyone has opportunities to grow and reach their full potential.
• We Deliver – We are uncompromising in our commitment to deliver innovative, high-quality, technology-led solutions for our customers and exceptional, sustainable value for all our stakeholders.
• We Are People of Integrity – We value honesty, trust, courage, fairness, prudence and tenacity. We believe doing what's right for the planet, the communities where we work, and our people is good for business.
• We Empower – We empower our people with a shared purpose, the right tools and the supportive culture they need to be proactive decision-makers, to be adaptive to change, and to succeed.
• We Are a Team of Teams – We have a will to succeed, but we value the achievements of our team of teams over individual accomplishments. Our collective focus makes us a better, stronger, more effective company.

We have also embedded environmental, social and governance (ESG) principles in every business operation and corporate function. Not only are we committed to operating safely, sustainably and equitably, but we are also committed to using our capabilities and expertise to help our customers accomplish their sustainability goals.

Worldwide, KBR employs a diverse workforce approximately 29,000 people strong, with customers in more than 80 countries and operations in 40 countries. At KBR, We Deliver.