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Salary
$49k – $61k per year
Location
Hybrid (United Kingdom)
Employment
Full-Time

Confirmed on the employer's own hiring board on Sep 28, 2026. First seen by Alion on Sep 25, 2026. Leidos scores A on the Alion truth index.

Overview
Company
Impact
Profile match
Leidos is an American technology and engineering services company created in 2013 when Science Applications International Corporation split in two, with Leidos taking the technical services and solutions business. It is one of the largest suppliers to the United States government, working across defence programmes, intelligence systems, civil agencies including the Federal Aviation Administration, and healthcare services for the Department of Veterans Affairs. Headquartered in Reston, Virginia, the company also builds security detection products for airports and borders, and has concentrated recent investment on trusted artificial intelligence and autonomy for mission environments.

Regression Test Engineer

Location: This is a Hybrid role. Whiteley, Hampshire

Clearance Required: This role will require attainment and maintenance of SC clearance

We're looking for a Senior Integration Test Engineer to join our team and support the delivery of a large-scale systems integration programme.

Working as part of a collaborative, multidisciplinary team, you'll help plan, design, and execute testing activities across a range of applications, interfaces, and infrastructure components. You'll work closely with colleagues, suppliers, and customer stakeholders to ensure solutions are thoroughly tested and meet quality expectations.

This role is ideal for someone who enjoys problem-solving, analysing data, investigating issues, and working with a variety of technologies and teams.

What You'll Be Doing

  • Creating and reviewing test plans, test cases, and test reports.
  • Designing and executing integration and regression testing activities.
  • Working with technical experts and stakeholders to understand requirements and ensure effective test coverage.
  • Recording and reporting test results, defects, risks, and issues.
  • Investigating defects and supporting root cause analysis and resolution.
  • Analysing test evidence and large datasets to demonstrate compliance with requirements.
  • Validating data flows and interfaces between existing and new systems.
  • Identifying opportunities to improve testing processes and ways of working.
  • Supporting the development and maintenance of automated regression test packs.

What We're Looking For

We're interested in people who can demonstrate experience in many of the following areas:

  • Software, systems, integration, or test engineering.
  • Functional, non-functional, integration, and regression testing.
  • Creating and executing test cases from requirements or design documentation.
  • Working on projects involving multiple systems, applications, or third-party integrations.
  • Investigating issues and supporting defect resolution.
  • Analysing data and interpreting test results.
  • Communicating effectively with both technical and non-technical audiences.
  • Managing priorities and working independently as well as part of a team.
  • A proactive approach and willingness to learn new technologies and tools.
  • Ability to attend our Whiteley office as required.

An ISTQB Foundation Certificate (or equivalent) is beneficial but not essential.

Nice to Have

Experience in any of the following would be an advantage, but isn't required:

  • Test automation and automated regression testing.
  • API, interface, or message-based testing.
  • Network or infrastructure testing.
  • SQL, data analysis, or log analysis tools.
  • Agile, DevOps, or Continuous Integration environments.
  • Working within secure or highly regulated environments.
  • Large-scale systems integration programmes.

What we do for you:

At Leidos we are PASSIONATE about customer success, UNITED as a team and INSPIRED to make a difference. We offer meaningful and engaging careers, a collaborative culture, and support for your career goals, all while nurturing a healthy work-life balance.

We provide an employment package that attracts, develops and retains only the best in talent. Our reward scheme includes:

  • Contributory Pension Scheme
  • Private Medical Insurance
  • 33 days Annual Leave (including public and privilege holidays)
  • Access to Flexible benefits
  • Flexi Working

Commitment to Diversity:

We welcome applications from every part of the community and are committed to a truly diverse and inclusive culture. We foster a sense of belonging, welcoming all perspectives and contributions, and providing equal access to opportunities and resources for everyone. If you have a disability or need any reasonable adjustments during the application and selection stages, please let us know, and we will respond in a way that best fits your needs.

Who We Are:

Leidos UK & EUROPE - we work to make the world safer, healthier, and more efficient through technology, engineering and science.

Leidos is a growing company delivering innovative technology and solutions focused on safeguarding critical capabilities and transformation in frontline services, our work in the United Kingdom includes addressing some of the most complex problems in defence, healthcare, government, safety and security, and transportation.

Working together as Team Leidos we are helping to transform the UK's defence supply chain by providing an integration of a complex mixture of services, at low risk, using a modern suite of systems that will deliver one version of the truth. For the first time, the MOD will see the whole picture, as it is happening.

What Makes Us Different:

Purpose: you can use your passion and abilities at Leidos to keep the people you care about safe. We are at the forefront of machine learning, AI, cyber security and solutions. Using your skills in the technology frontline by helping to build a safer world. You can inspire change.

Collaboration: having flexibility to do your job is one of our core benefits, enabling you to become part of our extraordinary team. We have been empowering our people to work flexibly for years. Whether you work from home, the office or on customer sites, we will give you the digital tools and the flexibility to work smarter and align your needs and ours.

People: Leidos empowers people from every background to be themselves and gives you the tools to learn new skills by enabling growth whilst developing. We believe that extraordinary people need opportunities to grow, to be inspired and to inspire others. At Leidos, we invest in technical academies, career rotations and a career development plans that that enhance your future.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

£36,900.00-£46,100.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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