Junior Penetration Tester

Position Description:

CGI Cyber Security Team in the UK is one of the largest Cyber consultancies in the UK with around 1700 members. The UK Cyber team works across a variety of domains including: Government Defence Critical Infrastructure Healthcare Utilities Banking and Financial Services and many more. At CGI you will get the opportunity to work across a number of domains and work in all areas of Cyber Security allowing you to grow and develop your career.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named one of the Worlds 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 youll be part of an open friendly community of experts. Well train and support you in taking your career wherever you want it to go.

This is a good opportunity for a junior penetration tester to work alongside and learn from experienced penetration testers (CHECK Team Members and CHECK Team Leaders) at CGI joining the Cyber Security business unit one of the largest groups of cyber security specialists in the UK. CGI has a long-established reputation in this area undertaking rigorous testing for a variety of commercial and public sector clients for over 30 years. Due to the secure nature of the programme you will need to hold UK Security Clearance or be eligible to go through this clearance.

Your future duties and responsibilities:

Deliver end to end penetration testing engagements across web applications and infrastructure domains from initial client engagement and scoping through to reporting and client aftercare.
Participate in client interactions including scoping discussions requirements gathering and contribution to proposals and statements of work.
Conduct penetration tests using structured methodologies and industry recognised approaches.
Deliver engagements as part of a collaborative team rather than individually leveraging shared expertise to enhance assessment quality and support continuous learning.
Produce high quality technical documents (including reports and technical proposals) covering detailed technical content and executive level summaries in line with internal standards.
Engage with the internal QA process to support report quality and ongoing development.
Maintain strong communication throughout engagements including client calls progress updates and formal debrief sessions.

Required qualifications to be successful in this role:

Essential:
Hack the Box Certified Penetration Testing Specialist (CPTS) or OffSec Certified Professional (OSCP)
Commitment to working towards NCSC CHECK Team Member (CTM) status

Desirable:
CREST Practitioner Security Analyst (CPSA)
CREST Registered Penetration Tester (CRT)
Cyber Scheme Team Member (CSTM)
Certified Red Team Operator (CRTO)
Practitioner Cyber Security Professional (PraCSP)
Previous penetration testing experience is advantageous but not mandatory. Structured training and mentoring will be provided.




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Skills:

• Security Monitoring AI
• Security Operations Center

What you can expect from us:

Together as owners lets turn meaningful insights into action.

Life at CGI is rooted in ownership teamwork respect and belonging. Here youll 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. Thats why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our companys strategy and direction.

Your work creates value. Youll 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.

Youll shape your career by joining a company built to grow and last. Youll 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 teamone of the largest IT and business consulting services firms in the world.