Site Reliability Engineer
Confirmed on the employer's own hiring board on Sep 24, 2026. First seen by Alion on Sep 9, 2026.
About Us
In 2019, the founders were working as engineers solving complex cross-domain problems within government organisations.
TwinStream was formed to bring together their collective expertise and experience into a single business, focused on delivering technical excellence and high-quality service to clients.
Since then, the company has grown to over 100 team members across the UK, with colleagues working both on-site with clients, hybrid and remotely from home.
The Details
Salary: £75,000 - £95,000 DOE
Location: The role is fully remote initially, but we may put you through DV clearance and, once cleared, ask you to work onsite in Cheltenham 2-3 days a week at some point in the future.
Security Clearance: Eligible for SC and/or DV Clearance
The Role
As a Site Reliability Engineer, you’ll play a key role in designing, building, and maintaining resilient systems that support critical operations. You’ll work closely with cross-functional teams to ensure our platforms are scalable, secure, and reliable.
This is a hands-on role where you’ll have the opportunity to influence technical direction, improve system performance, and contribute to meaningful projects.
What You’ll Be Doing
- Designing and maintaining reliable, scalable physical and virtual infrastructure
- Monitoring system performance and proactively resolving issues
- Automating processes using tools such as Ansible to improve efficiency and consistency
- Collaborating with engineers and stakeholders across the business
- Supporting continuous improvement of systems, tools, and practices
- Operating across the full infrastructure stack, from bare metal systems through to virtualised deployments and the applications running within them.
What We’re Looking For
We recognise that no one ticks every box. If your experience aligns with most of the below, we’d love to hear from you:
- Experience in Site Reliability Engineering, DevOps, or similar roles
- Strong knowledge of cloud platforms (e.g. AWS, Azure, or GCP)
- Experience with infrastructure as code and configuration management tools (e.g. Terraform, Ansible)
- Familiarity with CI/CD pipelines and automation practices
- Understanding of monitoring, logging, and alerting systems
- A collaborative mindset and a passion for problem-solving
What You’ll Get
- Competitive salary and benefits package
- 28 days’ holiday plus bank holidays, with the option to buy or sell an additional week
- Annual bonus
- 8% non-contributory pension
- Private healthcare and life insurance
- Enhanced parental leave
- Flexible working
- Opportunities for learning, development, and career progression
- Supportive and inclusive team environment
- The chance to work on meaningful projects
Diversity & Inclusion
We’re committed to building a diverse and inclusive workplace. We welcome applications from people of all backgrounds, experiences, and identities.
If you need any adjustments during the recruitment process, please let us know. We’re here to support you
Further Information:
Due to the nature of the work and the sectors we support, any offer of employment will be subject to the successful completion of the relevant security screening and clearance process.
This role requires eligibility for [BPSS / SC / DV]clearance. As part of the vetting process, candidates must meet the UK Government's residency and right-to-work requirements associated with the required level of clearance.