Senior Penetration Tester

4 days ago

London, Greater London, United Kingdom G-Research Full time £60,000 - £100,000 per year

Do you want to tackle the biggest questions in finance with near infinite compute power at your fingertips?

G-Research is a leading quantitative research and technology firm, with offices in London and Dallas.

We are proud to employ some of the best people in their field and to nurture their talent in a dynamic, flexible and highly stimulating culture where world-beating ideas are cultivated and rewarded.

This is a role based in our new Soho Place office – opened in in the heart of Central London and home to our Research Lab.

The role

We're looking for a Security Assessment Specialist to join our growing Cyber Security team, reporting into the Security Assessment Manager.

In this role, you'll lead and conduct penetration tests and vulnerability assessments across a wide range of internal systems and security controls. Your work will directly strengthen our overall security posture through continuous testing, actionable insights and collaboration on remediation strategies. 

Key responsibilities of the role include:

  • Performing in-depth penetration testing across a variety of technologies, including Kubernetes, Jenkins, and Windows Domain Services
  • Delivering practical, impactful remediation advice to Control Owners based on identified vulnerabilities
  • Supporting Business and Application Owners in assessing and improving the effectiveness of their security controls
  • Providing technical consulting and assurance to Risk, Compliance, and Detection Engineering teams — including control assessments and configuration reviews
  • Maintaining and enhancing the team's operational tooling, automation, and system integrations
  • Mentoring and supporting less experienced team members, fostering knowledge sharing and growth

Who are we looking for?

The ideal candidate will have the following skills and experience:

  • Proven expertise across the full penetration testing lifecycle, from scoping and execution to reporting and stakeholder debriefs
  • Deep understanding of vulnerability assessment practices, including effective remediation strategies for both infrastructure and application-level security
  • Strong background in technical security roles across diverse environments; familiarity with DevOps technologies is a plus
  • Experience validating the effectiveness of security controls through both manual and automated approaches
  • Engineering experience, particularly in building automation and tooling to streamline team output
  • Proficiency in development and scripting tools commonly used in DevSecOps, including Python, Jenkins and Ansible
  • Relevant security certifications such as OSCP (required), CRT or OSEP
  • Strong communication and interpersonal skills, with an emphasis on clear and concise written output

Why should you apply?

  • Highly competitive compensation plus annual discretionary bonus
  • Lunch provided (via Just Eat for Business) and dedicated barista bar
  • 30 days' annual leave
  • 9% company pension contributions
  • Informal dress code and excellent work/life balance
  • Comprehensive healthcare and life assurance
  • Cycle-to-work scheme
  • Monthly company events

G-Research is committed to cultivating and preserving an inclusive work environment. We are an ideas-driven business and we place great value on diversity of experience and opinions.

We want to ensure that applicants receive a recruitment experience that enables them to perform at their best. If you have a disability or special need that requires accommodation please let us know in the relevant section

  • Penetration Tester

    4 days ago

    London, Greater London, United Kingdom 2-sec consulting Full time £45,000 - £75,000 per year

    Job Advert2-sec is growing fast – and we're looking for top-tier penetration testers to join our dynamic team. If you're passionate about cybersecurity and want to be part of a company that values expertise, innovation, and career growth, this is your opportunity.We're not just offering a job - we're offering a future. The right candidate will have the...

  • Lead Penetration Tester

    2 weeks ago

    London, Greater London, United Kingdom 0ebd341e-b214-428f-b278-d55548574c2d Full time £55,000 - £70,000 per year

    We are looking to hire two Lead Penetration Testers with CTL Certification.This is a chance to join a well-established cybersecurity team that supports organisations across both public and private sectors. You'll play a key role in delivering high-quality penetration testing that helps clients stay secure in a fast-moving threat landscape.Role...

  • Senior Penetration Tester

    5 days ago

    London, Greater London, United Kingdom JPMorganChase Full time £80,000 - £120,000 per year

    DescriptionAs an Assessments & Exercises Vice President (Senior Penetration Tester) in the Penetration Testing team, you will contribute significantly to enhancing the firm's cybersecurity or resiliency posture by using industry-standard assessment methodologies and techniques to proactively identify risks and vulnerabilities in people, processes, and...

  • Senior Penetration Tester

    2 days ago

    London, Greater London, United Kingdom JPMorgan Chase Full time £60,000 - £120,000 per year

    As an Assessments & Exercises Vice President (Senior Penetration Tester) in the Penetration Testing team, you will contribute significantly to enhancing the firm's cybersecurity or resiliency posture by using industry-standard assessment methodologies and techniques to proactively identify risks and vulnerabilities in people, processes, and technology. As...

  • Penetration Tester

    15 hours ago

    London, Greater London, United Kingdom Spait Infotech Private Limited Full time £38,000 - £100,000 per year

    Job Description: Penetration Tester (Remote – UK)Experience: 0–12 YearsJob Type: Full-Time, PermanentLocation: Remote (UK Only)Right to Work: Must have eligibility to work in the UK. No sponsorship provided.Key ResponsibilitiesPerform penetration tests on web applications, networks, and systems to identify security vulnerabilities.Conduct security...

  • SC or NATO Cleared Penetration Tester

    2 weeks ago

    London, Greater London, United Kingdom iO Associates Full time £24,000 - £96,000 per year

    SC or NATO Cleared Pen Testers needed 100% Remote - OUTSIDE IR35 ContractiO Associates are currently looking forx3 SC or NATO Cleared Penetration Testersto join a12 month contract(OUTSIDE IR35)with alikely 12 month extensionstarting in January.The client is offeringup to £400 a day (Outside IR35).This role is 100% remote, you can work from the UK or a NATO...

  • Consultant Penetration Tester

    6 days ago

    London, Greater London, United Kingdom NTT DATA UK Full time £60,000 - £120,000 per year

    The team you'll be working with: Penetration Tester Consultant  - CRT registeredRole Overview:We are seeking a highly skilled and experienced Penetration Tester Consultant - CREST registered with a strong focus understanding on threat intelligence and attack methods.  The ideal candidate will be responsible for managing and conducting advanced penetration...

  • Penetration Tester

    2 weeks ago

    London, Greater London, United Kingdom Starling Full time £100,000 - £120,000 per year

    Starling is the UK's first and leading digital bank on a mission to fix banking We built a new kind of bank because we knew technology had the power to help people save, spend and manage their money in a new and transformative way. Read more about Our Story here.We're a fully licensed UK bank with the culture and spirit of a fast-moving, disruptive tech...

  • Senior Offensive Security Tester

    4 days ago

    London, Greater London, United Kingdom CovertSwarm Full time £60,000 - £120,000 per year

    The MissionAt CovertSwarm, we're redefining offensive security through constant, relentless attack. As a Senior Hive Member, you'll lead sophisticated operations that push beyond traditional boundaries, mentoring fellow operators while discovering new attack vectors that others miss.The OpportunityThis isn't just another testing role. You're an experienced...

  • Pen Tester Expert

    1 week ago

    London, Greater London, United Kingdom Smartedge Solutions Full time £60,000 - £90,000 per year

    Must : (Active Security Clearance)Pen Testing experience more than 3 years.security management consultancy including IT Health Checks (ITHC), risk assessmentspenetration testing tools including (Burpsuite, Metasploit, Nmap) etcconfigure network devices, firewalls, IDS/IPS devices and wireless technologiesregulatory compliance such as GDPR, ISO27001 and PCI...