10 of 10 CHECK Team Leader Jobs in London

technical quality assurance to join a high-impact project within the UK cyber security space. This role is ideal for someone who's not only delivered high-end red team engagements but has also overseen the work of others and provided expert-level guidance. You may have worked as a CHECK Team Leader, led adversary simulation … day a week on-site in either Cheltenham or London. Main Responsibilities: Reviewing and sampling technical reports to ensure they meet internal and external quality standards. Coaching and mentoring team leads, particularly those working independently without peer support. Advising the wider project team on best practices in red teaming and adversary simulation. Skills Required: Solid hands-on experience More ❯

technical quality assurance to join a high-impact project within the UK cyber security space. This role is ideal for someone who's not only delivered high-end red team engagements but has also overseen the work of others and provided expert-level guidance. You may have worked as a CHECK Team Leader, led adversary simulation … day a week on-site in either Cheltenham or London. Main Responsibilities: Reviewing and sampling technical reports to ensure they meet internal and external quality standards. Coaching and mentoring team leads, particularly those working independently without peer support. Advising the wider project team on best practices in red teaming and adversary simulation. Skills Required: Solid hands-on experience More ❯

A premier UK consultancy is seeking a skilled and passionate Penetration Tester to join its growing team of cybersecurity experts. This is a dynamic opportunity for individuals with strong technical skills and a proactive mindset, eager to make a tangible impact across a wide range of client environments. Working on mission critical projects across National Security, Critical National Infrastructure … stakeholders Work directly with clients as a trusted advisor – this is a consulting-facing role Operate in sensitive, high-risk environments where mistakes have real consequences Contribute to improving team tooling, processes, and client methodology Be comfortable working autonomously without extensive documentation or runbooks Key Qualifications and Skills: Candidates who meet the following criteria are strongly … encouraged to apply – and even if every box isn’t ticked, applications are welcome, as related opportunities may also be available: Possesses industry-recognised certifications such as CTM, CSTM, CTL, CSTL, OSCP, or CREST/Cyber Scheme qualifications. Brings specialist knowledge in one or more areas of penetration testing – this could include mobile app security, cloud environments, operational technology (OT More ❯

A premier UK consultancy is seeking a skilled and passionate Penetration Tester to join its growing team of cybersecurity experts. This is a dynamic opportunity for individuals with strong technical skills and a proactive mindset, eager to make a tangible impact across a wide range of client environments. Working on mission critical projects across National Security, Critical National Infrastructure … stakeholders Work directly with clients as a trusted advisor – this is a consulting-facing role Operate in sensitive, high-risk environments where mistakes have real consequences Contribute to improving team tooling, processes, and client methodology Be comfortable working autonomously without extensive documentation or runbooks Key Qualifications and Skills: Candidates who meet the following criteria are strongly … encouraged to apply – and even if every box isn’t ticked, applications are welcome, as related opportunities may also be available: Possesses industry-recognised certifications such as CTM, CSTM, CTL, CSTL, OSCP, or CREST/Cyber Scheme qualifications. Brings specialist knowledge in one or more areas of penetration testing – this could include mobile app security, cloud environments, operational technology (OT More ❯

technical quality assurance to join a high-impact project within the UK cyber security space. This role is ideal for someone who’s not only delivered high-end red team engagements but has also overseen the work of others and provided expert-level guidance. You may have worked as a CHECK Team Leader, led adversary simulation … day a week on-site in either Cheltenham or London. Main Responsibilities: Reviewing and sampling technical reports to ensure they meet internal and external quality standards. Coaching and mentoring team leads, particularly those working independently without peer support. Advising the wider project team on best practices in red teaming and adversary simulation. Skills Required: Solid hands-on experience More ❯

its inception, the company has grown to employ elite technical experts who have contributed to some of the world's largest technology and digital security projects. The NCSC-approved CHECK company specializes in penetration testing and security assessment services under the government-accredited CHECK scheme. They are currently seeking for a skilled Penetration Tester to join the growing … to identify issues within customer infrastructure and web applications. Perform various types of security testing, including network penetration, web application, mobile security assessments, and social engineering. Participate in red team engagements, employing creative strategies to outsmart defenders. Explore various approaches to gain unauthorized access to customer networks during red team exercises. Perform security assessments in accordance with the … in penetration testing and/or security surveillance. Exhibits eagerness to absorb new knowledge and technologies. Programming Exposure A relevant Cyber Security certification is advantageous, e.g. (OSCP, CRT, CTM, CTL) Showcases stellar communication skills. Benefits: Paid Certifications Health Insurance Pension Paid Certifications Salary More ❯

London (2 days per week on-site) Note: To be eligible for this role, you must be eligible for UK Security Clearance (SC). A high-performing digital security team is looking for an experienced Infrastructure Penetration Tester to join them in delivering critical assessments across complex and sensitive client environments. This is a hands-on internal testing role … environments Produce clear, concise reports tailored to both technical and non-technical audiences Build trusted relationships with clients in a consultancy-facing capacity Work within a small, high-trust team on sensitive engagements Contribute to the evolution of internal tooling and testing methodologies Operate effectively in environments with limited documentation or predefined processes Essential Experience and Skills At least … with technical debt Desirable Skills Python scripting or automation experience Understanding of Operational Technology (OT) networks Familiarity with internal infrastructure exploitation tools Certifications (preferred but not essential): CREST CTM, CTL, CSTM or Cyber Scheme Practitioner OSCP (current or lapsed) If you’re an experienced infrastructure penetration tester looking for meaningful work, we want to hear from you. More ❯

London (2 days per week on-site) Note: To be eligible for this role, you must be eligible for UK Security Clearance (SC). A high-performing digital security team is looking for an experienced Infrastructure Penetration Tester to join them in delivering critical assessments across complex and sensitive client environments. This is a hands-on internal testing role … environments Produce clear, concise reports tailored to both technical and non-technical audiences Build trusted relationships with clients in a consultancy-facing capacity Work within a small, high-trust team on sensitive engagements Contribute to the evolution of internal tooling and testing methodologies Operate effectively in environments with limited documentation or predefined processes Essential Experience and Skills At least … with technical debt Desirable Skills Python scripting or automation experience Understanding of Operational Technology (OT) networks Familiarity with internal infrastructure exploitation tools Certifications (preferred but not essential): CREST CTM, CTL, CSTM or Cyber Scheme Practitioner OSCP (current or lapsed) If you’re an experienced infrastructure penetration tester looking for meaningful work, we want to hear from you. More ❯

scope, figure it out, and adapt when things inevitably go sideways. Coding skills - Not essential, but if you can sling some Python around, it’ll help. Certs - OSCE, OSCE, CTL, CTM would be nice. But if you don’t have it and you know your stuff, that’s fine too. Consultancy experience - Again, preferred. If you’ve worked client-side … before, you’ll get the vibe. Location: The team’s largely remote as it stands. Occasionally, you’ll need to rock up to a client site - so don’t apply if you plan on never leaving the house. Level: They’re open to solid testers up to Principal level. But don’t expect a slow ramp-up - they need More ❯

scope, figure it out, and adapt when things inevitably go sideways. Coding skills - Not essential, but if you can sling some Python around, it’ll help. Certs - OSCE, OSCE, CTL, CTM would be nice. But if you don’t have it and you know your stuff, that’s fine too. Consultancy experience - Again, preferred. If you’ve worked client-side … before, you’ll get the vibe. Location: The team’s largely remote as it stands. Occasionally, you’ll need to rock up to a client site - so don’t apply if you plan on never leaving the house. Level: They’re open to solid testers up to Principal level. But don’t expect a slow ramp-up - they need More ❯