Security Architect – Defence

We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive and diverse team who always strive to do the right thing for our people, clients and communities.
People are our greatest asset, and we offer a competitive package to retain and attract the best talent.
In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships. We also give back to our communities through our Collectively program which incorporates matched-funding, paid volunteering time and charitable donations.
 
About the Opportunity

We are looking for an individual to join our team supporting ICT system design activities for a UK defence project. You will play an integral role in safeguarding the integrity and confidentiality of our client’s data and systems, responsible for designing, implementing, and maintaining security architectures that protect against a wide range of cyber threats.

Key responsibilities:

Designing Security Architecture. This is the core responsibility, involving the creation and oversight of robust security architectures for the ICT capabilities we are designing for our client. This includes planning, designing, building, and maintaining the overall security framework in line with SbD.

Strategic Alignment. Ensuring that security architectures align with the client's overall business strategy and technology goals. Translate business needs into security requirements.

Threat and Vulnerability Management. Identifying, assessing, and communicating current and emerging security threats and vulnerabilities. This involves performing or supervising risk analyses and security assessments (including ITHC).

Security Solution Design and Evaluation. Researching, evaluating, and recommending security technologies, tools (, firewalls, VPNs, IDS/IPS, EDR, SIEM, SOAR), and solutions to mitigate identified threats and address security needs.

Policy and Procedure Development: Defining, implementing, and maintaining corporate security policies, standards, and procedures to ensure compliance with industry regulations, legal requirements (, GDPR, HIPAA), and best practices.

Incident Response and Management: Playing a key role in developing incident response plans and coordinating efforts to detect, analyse, and respond to security incidents and breaches.

Stakeholder Communication and Collaboration: Effectively communicating complex security concepts, risks, and recommendations to diverse technical and non-technical stakeholders, including senior management.

Here’s What You’ll Need

Deep understanding of computer systems, networking, and cybersecurity principles. They should possess strong analytical and problem-solving skills, as well as the ability to think critically and creatively to identify and address potential security vulnerabilities.

Hands-on experience with security technologies, such as firewalls, intrusion detection systems, and encryption

Knowledge of cybersecurity standards and best practices

Ability to design and implement security architectures

Communication and collaboration skills to work with cross-functional teams

Ability to stay up-to-date with the latest cybersecurity threats and trends

Customers/sectors: Experience working within the UK MOD

Multiple year experience working on Defence systems

Qualifications: CISSP [desirable]

Our Culture:

Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business, and we genuinely believe that we all succeed by supporting one another through our culture of caring. We value positive mental health and a sense of belonging for all employees.

We aim to embed inclusion and diversity in everything we do. We know that if we are inclusive, we’re more connected, and if we are diverse, we’re more creative. We accept people for who they are, regardless of age, disability, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave. This is reflected in our wide range of Global Employee Networks centered on inclusion and diversity.

We partner with VERCIDA to help us attract and retain diverse talent. For greater online accessibility, please visit to view and access our roles. As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.

If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the

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Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at .