Company: CBSbutler Ltd.
Location: Bracknell
Posted: April 17th, 2026
Application Design Engineer
Onsite in Bracknell
Eligible for DV clearance
£50-55K per annum + benefits package
Step into architecture while staying hands-on. We're seeking an Application Design Engineer to support delivery of a secure Gateway solution for a major UK defence customer. This is an opportunity for a strong infrastructure/design engineer to broaden into architecture while working on mission-critical systems in a high-security environment. You'll help implement change, maintain availability, and support operational teams within a live, complex infrastructure landscape.
Identify and implement technical changes to support Gateway capability and maintain availability
Produce designs for change in collaboration with the customer and Programme Manager
Work daily with the Solution Owner and Engineering Lead on technical delivery tasks
Support SOC and 3rd Line teams in troubleshooting incidents and resolving complex issues
Assist with configuration and ongoing support of Gateway appliances and associated platforms
You'll bring solid hands-on experience across infrastructure and gateway environments, including:
Infrastructure
VMware / vSphere
RHEL & Windows Server
Trellix
SIEM platforms
Microsoft Stack
Active Directory
DNS
RDS
Networking
Citrix NetScaler
Wireshark
Storage
NetApp SAN
NAS
Backup technologies
Security & Gateway
Gateway appliances and software
PKI management applications
Web applications and protocols
A proactive self-starter who can work independently and within a team
Strong troubleshooting and analytical skills
Clear communication skills across technical and non-technical audiences
A desire to move from engineering into architectural responsibilities
Willingness to travel weekly within the South / Southwest at short notice
If you are interested in discussing this Application Design Engineer role further, please reply back with a copy of your updated CV.
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