Application Security Design Engineer

CBSbutler Holdings Limited trading as CBSbutler
Bracknell, United Kingdom
Last month
Applications closed

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Posted
26 Feb 2026 (Last month)
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Security Application Design Engineer

Onsite in Bracknell

Eligible for DV clearance

£50-55K per annum + benefits package

Join a high-impact engineering team delivering a secure Gateway solution for a major UK defence customer. This is a hands-on Security Application Architect role where you'll design, implement and troubleshoot mission-critical infrastructure in a live, security-sensitive environment. Working alongside senior architects and engineering leads, you'll play a key role in maintaining availability, supporting operational teams, and driving technical change across complex systems.

What You'll Be Doing

Identify and implement infrastructure and application changes to support Gateway functionality and availability

Produce detailed technical designs for change alongside the customer and Programme Manager

Work daily with the Solution Owner and Engineering Lead to deliver engineering outcomes

Provide technical support to SOC and 3rd Line teams, troubleshooting complex incidents

Configure and support Gateway appliances and associated software

Maintain high availability, resilience and security posture

Your Technical Background

You'll bring strong hands-on experience across:

Infrastructure

VMware / vSphere

RHEL & Windows Server

Trellix

SIEM platforms

Linux & Scripting

Shell scripting

REGEX

Firewall configuration

Microsoft Stack

Active Directory

DNS

RDS

Applications & Protocols

LDAP

Email, Chat & File standards

Web & Chat protocols

XML & JSON schema

LDIF

TLS server/client certificates

File type digital formats

Gateways

Deployment, configuration and support of Gateway appliances and their software

What We're Looking For

A self-starter comfortable working independently and collaboratively

Strong troubleshooting mindset

Clear written and verbal communication skills

Comfortable interacting with stakeholders at all levels

Willing and able to travel weekly within the South / Southwest at short notice

If you are interested in discussing this Application Security Design Engineer role further, please reply back with a copy of your updated CV

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