NSL- Site Reliability Engineer
Confirmed on the employer's own hiring board on Oct 20, 2026. First seen by Alion on Oct 19, 2026. BAE Systems scores B on the Alion truth index.
Location(s): UK, Europe & Africa : UK : Leeds
BAE Systems Digital Intelligence is home to 4,500 digital, cyber and intelligence experts. We work collaboratively across 10 countries to collect, connect and understand complex data, so that governments, nation states, armed forces and commercial businesses can unlock digital advantage in the most demanding environments.
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Job Title: Site Reliability Engineer
Location: Leeds
Grade: GG08 - GG10
Referral Bonus: £5,000
About the role
The National Security business in Leeds is growing and there are an increasing number of opportunities to work with a range of National Security clients to provide solutions that have a real impact.
Be part of a growing team that not only delivers for its clients but also gives back to the community with plenty of opportunities to get involved with local community engagement and outreach activities to help build tech and cyber skills in the region.
What you could be doing for us:
As an SRE, fundamentally you will be doing work that has historically been done by an operations team, but using software and systems engineering expertise to use automation to reduce human labour, limiting traditional manual operations work (incident tickets, on-call etc.) to no more than half of the SRE team's time.
Core role accountabilities include:
- Supporting and maintaining essential service that support core mission applications, proactively enhancing their availability, performance and stability;
- Finding innovative solutions to problems rather than undertaking repetitive work, automating everything you can. You will work alongside product teams, advising them of good practice in how to design and build systems, learning from what you know works well. And you will never be asked to spend more than 50% of your time on support (otherwise the product team supports the excess work until the support work returns to 50% or less);
- You will instrument applications where they don’t have sufficient monitoring in place, and use the output of it to demonstrate the improvements your team are making on a daily basis. You will be well versed in the relationship between software and infrastructure, understanding the characteristics of systems that enable them to be scalable and resilient to failure, and how to get the best out of the infrastructure they are deployed to;
- Participating in the wider DevOps/SRE community within the organisation;
What background are we looking for?
- Typically have experience in the following:
- Software development in Java and web technologies, e.g. JavaScript and HTML
- Familiarisation with database technologies such as Elastic, Mongo
- Know your way around Linux and Windows command lines, e.g. Bash and PowerShell
- Hands on experience with cloud infrastructure such as AWS, Azure or OpenStack
- Use of deployment tools such as chef and puppet
- Expertise in monitoring large systems using technologies such as ELK
- Experience of working in an Agile scrum team, and the tooling that supports it, e.g. Jira
- Diagnosing and troubleshooting application issues resulting in service outages
- Troubleshooting skills across different levels of the stack
- Understanding of ITIL terminology
- Experience with container management and micro-services architectures such as Docker
- Experience extending and improving Open Source Software
- Familiarisation with automation test frameworks such as Selenium
- Awareness and insight into technology trends to adopt new cutting edge tools
Why BAE Systems?
This is a place where you’ll be able to make a real difference. You’ll be part of an inclusive culture that values diversity, rewards integrity and
merit, and where you’ll be empowered to fulfil your potential. We welcome candidates from all backgrounds and particularly from sections of
the community who are currently under represented within our industry, including women, ethnic minorities, people with disabilities and LGBTQ+individuals.
We also want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example
dyslexia, autism, an anxiety disorder etc.) that may affect your performance in certain assessment types, please speak to your recruiter about
potential reasonable adjustments.
Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors
such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform
within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels ofNational Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting levelrequired for the role, to allow for meaningful security vetting checks
Life at BAE Systems Digital Intelligence
We are embracing Hybrid Working. This means you and your colleagues may be working in different locations, such as from home, another BAE Systems office or client site, some or all of the time, and work might be going on at different times of the day.
By embracing technology, we can interact, collaborate and create together, even when we’re working remotely from one another. Hybrid Working allows for increased flexibility in when and where we work, helping us to balance our work and personal life more effectively, and enhance well-being.
Diversity and inclusion are integral to the success of BAE Systems Digital Intelligence. We are proud to have an organisational culture where employees with varying perspectives, skills, life experiences and backgrounds - the best and brightest minds - can work together to achieve excellence and realise individual and organisational potential.