At a Glance
- Tasks: Lead advanced penetration tests and provide actionable security advice.
- Company: Join a global leader in financial systems and high-performance computing.
- Benefits: Enjoy a £240,000+ package, 30 days leave, flexible work, and more perks.
- Other info: Opportunity for hands-on work with cutting-edge technologies in central London.
- Why this job: Work in a collaborative, agile environment with top-tier talent and impactful projects.
- Qualifications: Strong penetration testing experience and OSCP certification required.
Entasis Partners are proud to be exclusively supporting a global organisation at the forefront of innovation in financial systems and high-performance computing. This is not your average security role. Our partner operates in a deeply technical, high-trust environment where the scale of data, the pace of experimentation, and the calibre of internal talent make for an exceptionally challenging and rewarding opportunity.
With a newly developed central London site focused on next-generation research, this firm is seeking a Senior Penetration Tester to strengthen its already world-class internal security capability.
The Opportunity
This is a hands-on, highly autonomous role embedded within a specialist cyber function. You’ll be trusted to scope, execute, and deliver sophisticated penetration tests and control assessments across a range of technologies including Kubernetes, Jenkins, and Windows-based infrastructure. More than just finding issues, you’ll work in partnership with teams across the business to advise, remediate, and embed meaningful improvements. The environment is agile, collaborative, and engineered for depth not red tape.
What You’ll Be Doing
- Leading advanced penetration tests across infrastructure, applications, and DevOps pipelines
- Providing clear, actionable advice to technical and business stakeholders
- Assessing the effectiveness of existing security controls through hands-on testing
- Working closely with Detection, Risk and Compliance teams to provide assurance and technical insight
- Enhancing internal tools and frameworks to drive automation and assessment efficiency
- Coaching and supporting junior colleagues through knowledge sharing and collaboration
What We’re Looking For
You’ll bring deep technical experience, natural curiosity, and the confidence to challenge assumptions. You may have worked in financial services, or equally in fast-paced engineering environments but what matters is your capability and judgement.
Must-haves include:
- Strong penetration testing experience from planning to execution and reporting
- Understanding of vulnerability management and secure systems design
- Familiarity with DevSecOps tooling and scripting (e.g., Python, Jenkins, Ansible)
- Strong grasp of how to assess and break technical controls — and explain fixes
- OSCP certification (required); CRT, OSEP or similar a strong bonus
- Clear, professional communication skills with both technical and non-technical teams
Why Apply?
- Exceptional total compensation ~£240,000+ package (base + discretionary bonus)
- 30 days’ annual leave + flexible working environment
- 9% employer pension contribution
- Daily lunch allowance and on-site barista coffee
- Private healthcare and life assurance
- Monthly socials, company events, and modern informal culture
- Cycle-to-work scheme and premium office facilities
This is an opportunity to test your skills at the very highest level with the tools, talent, and environment to match.
To learn more or arrange a confidential conversation, please contact Entasis Partners directly.
Senior Penetration Tester -£240,000+ Package employer: Entasis Partners
Join a pioneering global organisation in central London that champions innovation in financial systems and high-performance computing. As a Senior Penetration Tester, you'll thrive in a collaborative and agile environment that prioritises depth over bureaucracy, offering exceptional benefits such as a competitive £240,000+ package, 30 days of annual leave, and opportunities for professional growth through coaching and knowledge sharing. With a focus on meaningful improvements and a culture that values autonomy and expertise, this role is perfect for those looking to make a significant impact in the cybersecurity landscape.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Penetration Tester -£240,000+ Package
✨Tip Number 1
Network with professionals in the cybersecurity field, especially those who have experience in penetration testing. Attend industry conferences or local meetups to connect with potential colleagues and learn about the latest trends and challenges in the sector.
✨Tip Number 2
Showcase your hands-on experience by participating in Capture The Flag (CTF) competitions or contributing to open-source security projects. This not only sharpens your skills but also demonstrates your commitment to continuous learning and improvement.
✨Tip Number 3
Prepare for technical interviews by practising common penetration testing scenarios and case studies. Be ready to discuss your approach to scoping, executing, and reporting on tests, as well as how you would communicate findings to both technical and non-technical stakeholders.
✨Tip Number 4
Research the company’s culture and values, particularly their focus on innovation and collaboration. Tailor your conversations during interviews to reflect how your personal values align with theirs, and be prepared to share examples of how you've worked effectively in similar environments.
We think you need these skills to ace Senior Penetration Tester -£240,000+ Package
Some tips for your application 🫡
Tailor Your CV:Make sure your CV highlights your penetration testing experience, especially in planning, execution, and reporting. Include specific examples of your work with technologies like Kubernetes, Jenkins, and Windows-based infrastructure.
Craft a Compelling Cover Letter:In your cover letter, express your passion for cybersecurity and innovation in financial systems. Mention your OSCP certification and any other relevant qualifications, and explain how your skills align with the role's requirements.
Showcase Technical Skills:Clearly outline your familiarity with DevSecOps tooling and scripting languages such as Python and Ansible. Provide examples of how you've used these tools to enhance security measures or automate processes in previous roles.
Prepare for Communication:Since clear communication is key, prepare to discuss how you can convey complex technical concepts to both technical and non-technical stakeholders. Think of examples where you've successfully done this in the past.
How to prepare for a job interview at Entasis Partners
✨Showcase Your Technical Expertise
Be prepared to discuss your hands-on experience with penetration testing, especially in relation to the technologies mentioned in the job description, such as Kubernetes and Jenkins. Highlight specific projects where you successfully identified vulnerabilities and implemented solutions.
✨Communicate Clearly and Effectively
Since the role involves advising both technical and non-technical stakeholders, practice explaining complex concepts in simple terms. This will demonstrate your ability to bridge the gap between technical details and business needs.
✨Demonstrate Your Curiosity and Problem-Solving Skills
Prepare examples that showcase your natural curiosity and how you've challenged assumptions in previous roles. Discuss situations where you went beyond standard procedures to find innovative solutions to security challenges.
✨Emphasise Collaboration and Mentorship
The role requires working closely with various teams and coaching junior colleagues. Share experiences where you collaborated effectively with others or mentored team members, highlighting your ability to foster a supportive and productive work environment.
