Senior Software Tester (Security Clearance)

Senior Software Tester (Security Clearance)

Position Description
The Space, Defence and Intelligence business unit in CGI is a true IT Systems Integrator. We work, build, and operate bespoke, technically complex, mission-critical systems which help our clients keep us all safe and secure. We bring innovation to our clients using proven and emerging technologies, agile delivery processes and our deep expertise across the breadth of space, defence, intelligence, aerospace and maritime, all underpinned by our end-to-end cyber capability. We work collaboratively with global technology companies, cutting edge SMEs and academia to deliver the optimal solution for each client.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named one of the ‘World’s Best Employers’ by Forbes magazine. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you’ll be part of an open, friendly community of experts. We’ll train and support you in taking your career wherever you want it to go.

Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This position ill be working out of our site in Chippenham.

Your future duties and responsibilities
Are you a meticulous Software Tester with a passion for delivering robust, high-performing systems in complex environments?
We are seeking a skilled and motivated Automation Tester to join our dynamic team. This role is ideal for someone with a strong background in software testing—particularly within the Defence sector—who can bring both hands-on testing expertise and strategic thinking to new, high-impact projects.
If you thrive in fast-paced environments and have a deep understanding of testing Defence systems and setting up test strategies from the ground up, we’d love to hear from you.

Key Responsibilities:

• Design, develop, and implement comprehensive test strategies for new Defence-related software projects.

• Evaluate software applications to identify bugs, security issues, and performance bottlenecks.

• Execute manual and automated test cases, ensuring compliance with Defence standards and project-specific requirements.

• Collaborate closely with developers, analysts, and stakeholders to define acceptance criteria and resolve issues efficiently.

• Develop and maintain test plans, test scripts, and test documentation aligned with MOD standards and policies.

• Ensure delivered systems meet functional, non-functional, and security requirements, with a strong emphasis on traceability and auditability.

Required qualifications to be successful in this role
• Strong background in software testing within the Defence or secure government sectors.

• Experience creating and executing test strategies from inception, especially for new or greenfield projects.

• Familiarity with MOD systems, policies, and secure environments.

• Solid understanding of automation frameworks, tools (e.g. Selenium, JUnit, etc.), and continuous integration pipelines.

Desired Skills:

• Interest in the latest testing methodologies, tools, and industry trends.

• Knowledge of programming languages.

• Experience in test report and script writing.

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Together, as owners, let’s turn meaningful insights into action.

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team—one of the largest IT and business consulting services firms in the world.