Senior Network Security Engineer

Salary: £43,000 - 83,000 per year

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: hybrid connectivity spanning on-premise and cloud services.
• Desirable: virtual networking and hypervisor-level security controls.
• Desirable: familiarity with remote browser isolation technologies.
• Desirable: experience in environments requiring formal security accreditation.
• Applicants must be eligible and willing to undergo UK Security Vetting at DV level.

Responsibilities:

• 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.

Technologies:

• Cloud
• DevOps
• Firewall
• Support
• Network
• Security

More:

We are Jacobs, challenging today to reinvent tomorrow by solving some of the worlds most critical problems across thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery, and cutting-edge manufacturing. This is a full-time, permanent, hybrid role based in Bristol, with occasional business travel across the UK and a 40-hour working week. We support work-life balance with flexi-time and a wide range of employee benefits including comprehensive health cover, life assurance, income protection, holiday buy/sell scheme, wellbeing support, family, parental and fertility support, and an enhanced pension contribution scheme. We value safety, integrity, inclusion and belonging, and we offer flexible working arrangements, global volunteering and giving opportunities, and a culture that supports positive mental health and connection.

last updated 36 week of 2026