Senior Application Support Engineer

UKSV SC to start | DV pipeline required

I’m currently recruiting for an experienced Senior Application Support Engineer to join a specialist Defence project in London.

This is a great opportunity for someone with a strong technical support background who enjoys working with complex systems, solving difficult problems and taking ownership of live environments.

You’ll be joining a small technical team supporting a critical application, with plenty of scope to get involved across infrastructure, application support, troubleshooting and technical improvements.

What’s on offer?

• Contract initially running until 31/03/2027, with potential to extend
• Work within a secure and technically complex Defence environment
• Broad exposure across infrastructure, applications, networking and security technologies
• A role with genuine technical ownership and autonomy
• Opportunity to mentor and support other engineers
• Regular involvement with clients and technical stakeholders

What will you be doing?

As a Senior Application Support Engineer, you’ll be responsible for keeping a complex application environment running effectively while helping to improve its reliability and performance.

You’ll be involved in:

• Investigating and resolving technical issues across the application and supporting infrastructure
• Providing hands‑on support across Linux and infrastructure technologies
• Troubleshooting networking, connectivity and system‑related problems
• Supporting deployments, upgrades, changes and technical improvements
• Monitoring system performance and identifying potential issues before they impact service
• Working with development teams and third parties when issues require deeper investigation
• Helping maintain a reliable and secure production environment
• Providing technical guidance to other engineers
• Working directly with clients and stakeholders to understand and resolve issues

What technical experience are we looking for?

You aren't expected to have every piece of technology but the ones below are what we are looking for:

• Docker
• VMware
• Active Directory
• DNS
• Networking and routing
• IPSEC / cryptography
• PKI and certificate management
• Cisco

The right person

We're looking for someone who is technically curious, comfortable working independently and able to take ownership when problems arise.

You should be confident dealing with complex technical issues, communicating with clients and working across different technologies rather than being restricted to a single area.

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