Senior Penetration Tester - CTL

UBDS Group
London

3B Data Security (part of UBDS Group) are looking for a skilled and experienced Senior Penetration Tester who can provide exceptional service delivery and contribute to the continued expansion of the organisation.

You will have a CHECK Team Leader (CTL) qualification in infrastructure and must also hold a Chartered or Principal Cyber Security Professional title in Security Testing.

You will be an integral member of the team, working with senior management to achieve and maintain CHECK Green status. You will take the lead on CHECK engagements, directing the team as necessary to provide a high-quality service to our clients.

In addition to CHECK work, you will also work on our commercial engagements which range from infrastructure and application testing (web and mobile) to social engineering and Red Team engagements. There are opportunities to develop future complementary testing services around different industries and technology areas, and help to grow the team, business unit and service offerings where necessary.

 

Key Responsibilities Include:

  • Being the Lead Penetration Tester on a wide portfolio of penetration testing engagements including complex CHECK engagements and ITHCs as well as and large projects for our key clients.
  • Working with senior management to maintain CHECK Green Status.
  • Creating high quality reports, ensuring complex technical data is conveyed in a way that is meaningful for customers.
  • Mentor and coach more junior members of the team to help them to grow and develop their career.
  • Build meaningful relationships with customers, ensuring they are kept up to date on the progress of the engagement and any pertinent findings in a timely manner.
  • Acting as a subject matter expert, supporting customers to better understand their situation and the value that 3B Data Security can bring to their organisation.
  • Provide technical presales support where necessary, to assist in the scoping of new engagements.
  • Identify business development opportunities, assisting in the development and implementation of such opportunities.

 

Requirements

  • A CTL qualification in applications is essential and a required prerequisite.
  • A second CTL qualification in applications would be bonus.
  • Chartered or Principal CSP.
  • A solid background in penetration testing with demonstrable experience of working at a senior level.
  • An ability to achieve and hold UK security clearance is essential.
  • Demonstrable experience of leading a team to achieve high quality outcomes.
  • You must be passionate and enthusiastic for penetration testing and be proactive to increase your knowledge and skills in this area.
  • You must have excellent communication skills and be customer focused.
  • You will be self-motivated and be able to work autonomously.
  • Due to the nature of the role, ideally you would have your own transport and be able to react at short notice when needed.

Benefits

Why people choose to grow their careers at UBDS Group

 

Professionals choose to grow their careers at UBDS Group for its reputation as a dynamic and forward-thinking organisation that is deeply committed to both innovation and employee development. At UBDS Group, employees are given unique opportunities to work on cutting-edge projects across a diverse range of industries, exposing them to new challenges and learning opportunities that are pivotal for professional growth. The Group’s culture emphasises continuous improvement, offering ample training programs, mentorship, and the chance to gain certifications that enhance their skills and marketability.

 

UBDS Group fosters a collaborative environment where creativity and innovation are encouraged, allowing employees to contribute ideas and solutions that have a tangible impact on the company and its clients. This combination of professional development, a culture of innovation, and the opportunity to make meaningful contributions makes UBDS Group an attractive place for those looking to advance their careers and be at the forefront of technological and operational excellence.

 

Employee Benefits

  • Training – All team members are offered a number of options in terms of personal development, whether it is technical led, business acumen or methodologies. We want you to grow with us and to help us achieve more
  • Private medical cover for you and your spouse/partner, offered via Vitality
  • Discretionary bonus based on a blend of personal and company performance
  • Holiday – You will receive 25 Days holiday, plus 1 day for Birthday and 1 day for your work anniversary in addition to UK bank holidays
  • Electric Vehicle leasing with salary sacrifice
  • Contributed Pension Scheme
  • Death in service cover

About UBDS Group

At UBDS Group our mission is to support entrepreneurs who are setting new standards with technology solutions across cloud services, cybersecurity, data and AI, ensuring that every investment advances our commitment to innovation, making a difference, and creating impactful solutions for organisations and society.

Equal Opportunities

We are an equal opportunities employer and do not discriminate on the grounds of gender, sexual orientation, marital or civil partner status, pregnancy or maternity, gender reassignment, race, colour, nationality, ethnic or national origin, religion or belief, disability or age.

Posted 2026-06-03

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