Security Penetration Tester

  • Sivara GmbH
  • Normanton-on-trent, Nottinghamshire
  • 21/06/2026
Full time Information Technology Telecommunications

Job Description

Salary: £78,000 - 78,000 per year

Requirements
  • Strong knowledge of manual penetration testing techniques
  • Confident with operating systems and tools such as Tenable, Burp Suite, Kali Linux
  • Exposure to remediating vulnerabilities and patch management in a complex business environment
  • Experience in remediating cyber risks in the digital estate
  • Experience in a penetration testing enterprise environment
  • Ability to prepare detailed reports and present findings to key stakeholders
  • Cyber security industry certification(s) such as CSTM/CRT/OSCP/CTL
  • Understanding of different patching management techniques and approaches for various technology stacks (e.g., SaaS, IaaS, End-User Computing, Server Estate)
  • Knowledge of TVM concepts, technologies, and best practices, including OSINT tools, vulnerability assessment, and threat modelling
Responsibilities
  • Support and develop an internal penetration testing function
  • Conduct network and application penetration testing, code, and security reviews
  • Identify and exploit vulnerabilities through proof-of-concept testing
  • Support vulnerability management across the enterprise with a framework for identification, categorisation, and mitigation
  • Create and support the operating model for vulnerability management across the business
  • Develop and maintain penetration testing documentation, policies, and procedures
  • Integrate cyber security solutions, including vulnerability scanning tools, with existing systems
  • Evaluate and recommend technologies, tools, and vendors to meet business needs
  • Investigate newly identified cyber security vulnerabilities and provide appropriate mitigation actions
  • Liaise with technology and business stakeholders regarding cyber security patching and vulnerability management
  • Maintain a cyber threat assessment methodology aligning with industry standards
  • Support proactive threat hunting for new and emerging cyber threats
  • Develop and maintain dashboards with cyber security threat and vulnerability metrics
  • Ensure compliance with relevant industry standards, regulations, and best practices, such as GDPR, NIS, and ISO 27001
Technologies
  • IaaS
  • Support
  • Linux
  • Network
  • Security
More

We are Thames Water, the UKs largest water and wastewater company, serving over 16 million customers daily. Our mission is to build a better future for all, helping our customers, communities, people, and the planet thrive. As a Security Penetration Tester, you will join our hybrid team based in Clearwater Court, Reading, and enjoy a competitive salary of up to £78,000 per annum, along with 26 days of annual leave increasing to 30 with service, a generous pension scheme, and various health and well being benefits. We are committed to creating a diverse and inclusive workplace, and we welcome applications from everyone. Together, we can make a daily difference for millions while protecting the world of water for future generations.