Senior Network Security Engineer in Gloucester

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.

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.

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.

Joining Jacobs not only connects you locally but globally. Our values stand on a foundation of safety, integrity, inclusion and belonging. We put people at the heart of our business, and we truly believe that by supporting one another through our culture of caring, we all succeed. We value positive mental health and a sense of belonging for all employees.

With safety and flexibility always top of mind, we've gone beyond traditional ways of working so you have the support, means and space to maximize your potential. You'll uncover flexible working arrangements, benefits, and opportunities, from well-being benefits to our global giving and volunteering program, to exploring new and inventive ways to help our clients make the world a better place.

We aim to embed inclusion and belonging in everything we do. We know that if we are inclusive, we're more connected and creative. We accept people for who they are, and we champion the richness of different perspectives, lived experiences and backgrounds in the workplace, as a source of learning and innovation.

Jacobs partners with VERCIDA to help us attract and retain talent from a wide range of backgrounds. 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.

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.