Network Engineer

Work on Technology That Protects What Matters

At SiXworks, we build secure digital solutions that support Defence and National Security missions. Our teams work on complex problems where reliability, security, and speed of innovation matter.

We're looking for a Network Engineer who enjoys solving difficult technical challenges and wants their work to have real operational impact.

What You'll Do

As a Network Engineer, you'll help design, build, and deliver secure digital solutions in highly secure environments. You'll work alongside engineers, architects, and delivery specialists to develop technology that enables faster, safer decision making for critical operations.

• Do you feel as comfortable building and supporting production LANs as you do global WANs?
• Can you implement firewall rules from an application's bespoke requirements?
• Are you a tinkerer able to lab and POC new technologies while also able to be a CLI-jockey?
• Do you want to work in an organisation working on latest technologies and incorporating solutions in an innovative way?
• Are you ready to learn about Secure by Design methodologies from a company working in National Security & Defence?

What We're Looking For

We value people who take ownership, think critically, and enjoy working as part of a collaborative team tackling complex challenges. You don't need to tick every box, but we're particularly interested in people with skills/experience in:

Implementation and Support of

• Wide Area Network Architecture
• Software Defined Wide Area Network
• Network Routing Protocols - OSPF, BGP
• Virtual Private Networks (VPNs) and Network Security Infrastructure - e.g. IKEv2, NGFWs
• Creating configuration guides and implementing from High Level and Low Level Designs

Desirable

• Solid networking foundation and principles
• Multi Vendor Switching
• Firewalling techniques & Hardware - Multi vendor preferred
• WAN Technologies
• Understanding of working in protectively marked environments.
• Ability to work with our customers in an efficient and professional manner
• Able to work on the fly with limited support / access to problem solving materials.

Implementation and Support of

• Data Centre Network Architecture - Spine/Leaf Fabric, EVPN, BGP, Geneve
• High Assurance IP Encryptors (HAIPE)
• Infrastructure Automation and Orchestration technologies (e.g. Ansible, Terraform etc.)
• Whitebox Network Infrastructure (e.g. Mellanox, Cumulus Linux, Nvidia Networking)
• Support and Troubleshooting of NSX
• Cisco CCNP or equivalent experience

Just as important are curiosity, strong problem solving ability, and the motivation to continuously improve how technology is designed and delivered.

Benefits

We offer competitive salaries and a package that supports your wellbeing and development, including 25 days annual leave + bank holidays, free Private Medical cover and Life Assurance, Generous pension (10% employer, 5% employee contribution), Bonus and Professional development and training support. In addition to secure parking, gym, café & restaurant on site and lots of open break out spaces.

A word on UK Security Clearance

Due to the secure nature of the position and working environment, you must have or be eligible to obtain Security Clearance. More details relating to UK Security Clearance can be found here: United Kingdom Security Vetting: clearance levels - GOV.UK ()