Security Engineer

Matchtech; United Kingdom; Hybrid; GBP 45,000 - 70,000; Full time

Job summary

A leading company in defense and technology is seeking a Security Engineer to enhance the security architecture of critical systems. The role demands expertise in NIST standards and Defence Standards, focusing on risk assessments, threat modelling, and secure engineering practices. Candidates must be detail-oriented and capable of navigating complex security challenges while working collaboratively within an agile environment. This position offers a hybrid work setting in Bristol with a full-time commitment.

Qualifications

• Proven experience with NIST 800-30, 800-37, 800-53 (Essential).
• Knowledge of Defence Standards, especially DefStan 05-138 and 05-139.
• Solid understanding of ISO 27001/2, ISO 31000, and JSPs.

Responsibilities

• Leading product risk assessments and driving security improvements.
• Conducting threat modelling and collaborating with engineers.
• Performing code reviews and penetration testing.

Skills

Threat modelling

Risk assessment

Secure-by-design engineering

Communication

Problem solving

Tools

Threat modelling tools

Job description

Security Engineer

3 days ago Be among the first 25 applicants

Direct message the job poster from Matchtech

Recruitment Business Partner at Matchtech | Recruiting across Engineering Technology Skillsets in the UK Defence market

Security Engineer – Bristol (Hybrid)

Security Clearance: SC (Eligible)

Are you passionate about securing the future of critical technology? Do you have deep working knowledge of NIST standards and Defence Standards like DefStan 05-138 Issue 3 and DefStan 05-139 Issue 1?

We’re hiring a Product Security Engineer to help shape the security architecture of next-generation defence and technology systems. This is a high-impact role where your expertise in threat modelling, risk assessment, and secure-by-design engineering will drive innovation and resilience from day one.

What You’ll Be Doing:

• Leading product risk assessments and driving security improvements across the full development lifecycle.
• Conducting threat modelling and collaborating closely with engineers to embed security at every layer.
• Applying your hands-on knowledge of DefStan 05-138 and 05-139 to ensure products meet UK defence requirements.
• Leveraging the NIST 800 series (an absolute must) to establish best-in-class security frameworks.
• Performing code reviews, penetration testing, and guiding remediation efforts.
• Producing clear, robust documentation such as RMADS and Security Assurance artefacts.

What You Bring:

• Proven experience with NIST 800-30, 800-37, 800-53 and related frameworks. (Essential)
• Practical, working knowledge of Defence Standards, especially DefStan 05-138 and DefStan 05-139.
• Familiarity with threat modelling tools and methodologies.
• Solid understanding of ISO 27001/2, ISO 31000, and JSPs.
• Strong communication skills with the ability to simplify complex risks for non-technical stakeholders.
• A passion for secure design, ethical problem solving, and delivering high-assurance solutions.

You’ll Thrive In This Role If You:

• Enjoy working at the intersection of engineering, cyber, and defence.
• Are detail-oriented and solutions-driven with a calm, analytical approach to security challenges.
• Can manage multiple projects and priorities in a dynamic, agile environment.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Industries

  Defense and Space Manufacturing, Computer and Network Security, and Information Services

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