Penetration Tester

As a penetration tester in our CTAS team you’ll play a vital role in helping our clients detect, understand and manage their security risks. You’ll be responsible for undertaking rigorous tests that identify vulnerabilities which are present in the IT infrastructure, applications and networks on which our client’s businesses rely. You’ll employ both manual and automated techniques to simulate real world attacks which help our clients assess their security posture against any potential threats to their business. You’ll also be expected to keep your knowledge of the ever-evolving threat landscape up-to-date and adhere to ethical guidelines, especially when handling sensitive data.

As well as having proven technical skills, you’ll also need to demonstrate the strong communication skills needed to describe complex findings to a range of different, often non-technical, stakeholders.

Hybrid working: The places that you work from day to day will vary according to your role, your needs, and those of the business; it will be a blend of Company offices, client sites, and your home; noting that you will be unable to work at home 100% of the time.

Your role

Being certified as a CHECK Team Member (CTM) is a prerequisite to joining our CTAS team as a penetration tester. As a member of this team, you’ll deliver highquality penetration testing and consultancy services as well as a full range of security assessments (including specialist areas and IT Health Checks) in line with Capgemini’s policies, core values, methodologies, and commercial expectations. This includes:

• Producing accurate, concise documentation including technical reports, executive summaries, scopes, and proposals.
• Engaging a variety of different stakeholders, some technically minded and others not, to ensure they understand work you have delivered.
• Ensuring relevance, maintaining confidentiality, aligning with the QA manual, meeting client expectations, and upholding Capgemini’s own standards.
• Maintaining your strong technical expertise and contributing to service development by staying up-to-date with emerging threats, technologies, vulnerabilities and methodologies.
• Sharing your knowledge across the team, participating in research and involving yourself in initiatives which enhance capability.

You can bring your whole self to work. At Capgemini building an inclusive future is part of everyday life and will be part of your working reality. We have built a representative and welcoming environment, for everyone.

• Proven experience working in a Penetration Testing role as a certified Check Team Member (CTM) is essential.
• Strong knowledge of penetration testing tools including (Burpsuite, Metasploit, Nmap, etc).
• Good knowledge of multiple Operating Systems (OS) including Windows & *NIX.
• Ability to configure network devices, firewalls, IDS/IPS devices and wireless technologies.
• Good understanding of common security standards and regulatory compliance such as GDPR, ISO27001 and PCI DSS.
• Experience of testing AI / LLMs is desirable but not essential.
• Excellent written and verbal communication skills (includes writing detailed reports and providing clear recommendations for remediation).
• Proven organisation skills which include working under pressure and dealing with ambiguity to meet deadlines.
• Ability and willingness to work effectively and positively within a team e.g. collaborating by sharing knowledge and skills
• Willingness to travel to client locations across the UK.

If you’re passionate about penetration testing and eager to grow in a supportive and inclusive environment, we’d love to hear from you.

We are a Disability Confident Employer

Capgemini is proud to be a Disability Confident Employer (Level 2) under the UK Government’s Disability Confident scheme. As part of our commitment to inclusive recruitment, we will offer an interview to all candidates who:

-Declare they have a disability, and

Capgemini’s Global Cybersecurity Practice is home to over 4,000 professionals delivering secure, innovative solutions across IT and OT environments - from networks to cloud services and everything in between. Capgemini’s Technical Assurance Services (CTAS) team in the UK is a dynamic part of our Global Cybersecurity Practice., If you are successfully offered this position, you will go through a series of pre-employment checks, including: identity, nationality (single or dual) or immigration status, employment history going back 3 continuous years, and unspent criminal record check (known as Disclosure and Barring Service)

To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance.

To obtain SC clearance, the successful applicant must have resided continuously within the United Kingdom for the last 5 years, along with other criteria and requirements.

Throughout the recruitment process, you will be asked questions about your security clearance eligibility such as, but not limited to, country of residence and nationality.

Some posts are restricted to sole UK Nationals for security reasons; therefore, you may be asked about your citizenship in the application process.

Make it real - what does it mean for you?

• You’d be joining an accredited Great Place to work for Wellbeing in 2024. Employee wellbeing is vitally important to us as an organisation. We see a healthy and happy workforce a critical component for us to achieve our organisational ambitions. To help support wellbeing we have trained ‘Mental Health Champions’ across each of our business areas, and we have invested in wellbeing apps such as Thrive and Peppy.

• You’ll be bringing your unique skills and perspectives to the team, inspiring and taking inspiration from your teammates as you unlock value in everything you do. You’ll be joining a professional community of experts, who have got your back and will support you, every step of the way.
• You will reimagine what’s possible: creating value for the world’s leading organisations through technology to build a sustainable, more inclusive future. You will work with a range of clients all with a unique set of business, technological and societal ambitions, which will make a real impact across the UK.

Capgemini. Make it real.

Why you should consider Capgemini

Growing clients’ businesses while building a more sustainable, more inclusive future is a tough ask. When you join Capgemini, you’ll join a thriving company and become part of a collective of free-thinkers, entrepreneurs and industry experts. We find new ways technology can help us reimagine what’s possible. It’s why, together, we seek out opportunities that will transform the world’s leading businesses, and it’s how you’ll gain the experiences and connections you need to shape your future. By learning from each other every day, sharing knowledge, and always pushing yourself to do better, you’ll build the skills you want. You’ll use your skills to help our clients leverage technology to innovate and grow their business. So, it might not always be easy, but making the world a better place rarely is.

About Capgemini

Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organisations and make it real with AI, technology and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of over 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations. The Group reported 2025 global revenues of €22.5 billion.