At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good.

Are you ready to shape the future of secure connectivity? At Jacobs, we are seeking a Senior Network Security Engineer to deliver high-assurance, security-critical solutions within regulated and sovereign UK contexts.

This is your opportunity to work on impactful programmes that blend traditional networking with modern secure access and hybrid cloud connectivity. Collaborate with multidisciplinary teams to solve unique connectivity challenges in restricted and isolated environments, enabling secure, resilient operations across public and private infrastructures.

What you’ll do:

• Design and deliver secure network architectures for controlled environments.
• Engineer secure browsing and remote access solutions.
• Define and implement firewall policies, DNS design, and traffic control.
• Apply Zero Trust principles to network access and service exposure.
• Support secure data flows and one-way transfer mechanisms.
• Collaborate with DevOps and platform teams to integrate networking and security controls.
• Act as a technical authority on secure connectivity and network risk.

Core requirements:

• Proven experience in network security engineering within high-assurance or regulated environments.
• Strong understanding of network architecture, segmentation, firewall policies, and traffic inspection.
• Experience with Zero Trust networking and designing for restricted or air-gapped environments.
• Security-first mindset with knowledge of operational risk and compliance constraints.

Desirable experience:

• Hybrid connectivity spanning on-premise and cloud services.
• Virtual networking and hypervisor-level security controls.
• Familiarity with remote browser isolation technologies.
• Experience in environments requiring formal security accreditation.

At Jacobs, we deliver solutions that matter. You’ll be trusted to make technical decisions, encouraged to challenge respectfully, and supported to deliver pragmatic, high-quality solutions. If you’re ready to shape the future of secure connectivity and network security, we’d love to hear from you.

This role is subject to UK Security Vetting at DV (developed vetting) level. Applicants must be eligible and willing to undergo the appropriate security clearance process if not already cleared. If you’re successful in your application, we’ll ask you to undergo the relevant vetting process to achieve DV clearance. You can find out more about vetting here.

Any offer of employment will be conditional upon satisfactory completion of the relevant clearance process.

This is a full time, permanent, hybrid (2-3 days/week) role based in Bristol, with occasional business travel across the UK.

Full‑time employment at Jacobs is based on a 40‑hour working week. We place a strong emphasis on work‑life balance and flexibility, and flexi-time is available.

We offer an excellent and wide range of employee benefits including comprehensive Health Cover, Life Assurance, Income Protection, holiday buy/sell scheme, and a variety of wellbeing, family, parental and fertility support offerings, along with an enhanced contribution pension scheme.

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More company details and info below:

We value collaboration and believe that in-person interactions are crucial for both our culture and client delivery. We empower employees with our hybrid working policy, allowing them to split their work week between Jacobs offices/projects and remote locations enabling them to deliver their best work.

Your application experience is important to us, and we’re keen to adapt to make every interaction even better. 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 team via Careers Support.