Junior Penetration Tester

Junior Penetration Tester

Location:

Reading, United Kingdom, England - South East

Employment Type:

Full Time

CGI Cyber Security Team in the UK is one of the largest cyber consultancies in the UK with around 1,700 members. The team works across a variety of domains including Government, Defence, Critical Infrastructure, Healthcare, Utilities, Banking and Financial Services, and many more.

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, inspiring everyone to pursue careers in our sector—including our Armed Forces—and are proud to hold a Gold Award for supporting the Armed Forces Corporate Covenant.

An opportunity for a CHECK Team Member or Infrastructure CHECK Team Leader is available within the Cyber Security business unit, one of the largest groups of security specialists in the UK. Because of the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to obtain it.

• You will join an established team of penetration testers with the possibility of progressing to team leader or principal tester positions.
• You will be able to work flexibly, undertaking work at home and at client sites across the UK.

We offer full 360‑degree services to clients, from initial consulting on Risk Assessments and Vulnerability Management to Accreditations (ISO
27001, GDPR), GRC, Security Architecture Design and Build (both technical and non‑technical), Incident Response, Protective Monitoring Services, Penetration Testing, and more.

We guide clients through a journey to improve their overall security posture and maturity, ensuring they feel reassured by the controls, measures and systems we put in place to meet their requirements.

At CGI, training and development are vital. We provide up‑to‑date training on the latest trends, while aligning it with your career ambitions to support you in advancing wherever you wish.

• OSCP / OSCP+ certification
• Willingness to learn

• Previous penetration testing experience is highly desirable but not essential, as training will be provided.

• Cyber
• Security Monitoring AI
• Security Operations Center

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

Life at CGI is rooted in ownership, teamwork, respect and belonging. From day one you will be an owner, not just an employee, shaping the company’s strategy and direction while benefiting from global capabilities.

Your work creates value: you will develop innovative solutions, build relationships with teammates and clients, and access industry expertise across technology and business.

We support career growth with guidance and opportunities to deepen skills and broaden horizons, while leaders care about your health and well‑being.

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