OnSecurity LLP
City, London
AI-Augmented Pentesting: Human Expertise Where It Matters Most. At OnSecurity, we're redefining cybersecurity through AI-augmented penetration testing - the perfect blend of AI efficiency and human ingenuity. We deliver comprehensive, CREST-approved testing that saves time and money without compromising quality. Our all-in-one platform combines AI-driven automation with expert human insight to provide faster, more accurate results. The outcome? Streamlined testing, actionable intelligence, and security at scale. We're revolutionising how organisations protect their digital assets helping businesses stay secure, resilient, and one step ahead of threats. Working Hours and Location We are based in the UK with employees working remotely. Some roles may have hybrid preference depending on the team. You can ask us about the best working hours and work setup in the recruitment process if there's something that's important to you. We try to be as flexible as possible. All we ask is that everyone is online between our core hours of 10:00-16:00 (UK time) so that everyone overlaps for the majority of the day. It's up to you and your manager to find the right schedule that works for you and your team. Role Purpose As a Penetration Tester , you'll play a central role in delivering high-quality, manual security testing to OnSecurity clients across a variety of sectors. You'll take ownership of full test cycles; scoping, delivery, reporting, and client communication while helping to mentor junior testers and enhance OnSecurity's technical capabilities. This role blends autonomy, technical depth, and real impact. Role Importance, Responsibilities and Impact What you will be doing: Delivering web, API, mobile, and infrastructure penetration tests remotely. Identifying, analysing, and exploiting vulnerabilities beyond automated tools. Producing detailed, high-quality reports for developers and security teams. Collaborating with internal testers to refine methodologies and tooling. Contributing to TestNet and methodology development. Mentoring Junior testers. What you won't be doing: Following rigid scripts, you'll be encouraged to think critically and creatively. Getting lost in bureaucracy, we empower our testers to deliver results via our intuitive portal Timeline for Role Expectations Within 1 month: Become familiar with our testing platform and delivery process. Within 3 months: Lead your own engagements end-to-end and produce client-ready reports. Within 6 months: Contribute to internal tooling, mentor junior testers, and help shape new methodologies. About You This role is a great fit if you . Minimum 2 years' experience delivering penetration tests in one or more disciplines. Strong knowledge of OWASP Top 10 and common vulnerability classes. Excellent written and verbal communication skills. Enthusiastic team player who values collaboration and quality delivery. Compensation What you will get for your hard work . A competitive compensation package . The salary range for this role is roughly £35k - £60k annually, depending on experience. Work at one of the fastest-growing Cyber Security Scale-Ups revolutionising pentesting. A clear progression plan. We want you to keep growing. That means trying new things, leading others, challenging the status quo and owning your impact, always with our complete support. Flexibility : We promote life-work balance at OnSecurity. We encourage everyone on our team to enjoy their life and ensure they have the balance they need to reach their full potential. Work where you work best. We're a distributed team. If you live in Bristol, we have a hybrid approach, if this is something that fits for your team. Otherwise, we are remote, and so we build our ways of working around this. Other benefits: 30 days of paid annual leave, plus bank holidays Company Pension Scheme Private Health Insurance with Vitality Employee Assistance Program (EAP) Group Life Assurance (x4 salary) Enhanced Maternity, Paternity, and Adoption Leave Paid study leave for employees to level up their skills Mentorship and Coaching Annual Performance reviews and recognition for high performance Regular socials and activities, online and in-person.
AI-Augmented Pentesting: Human Expertise Where It Matters Most. At OnSecurity, we're redefining cybersecurity through AI-augmented penetration testing - the perfect blend of AI efficiency and human ingenuity. We deliver comprehensive, CREST-approved testing that saves time and money without compromising quality. Our all-in-one platform combines AI-driven automation with expert human insight to provide faster, more accurate results. The outcome? Streamlined testing, actionable intelligence, and security at scale. We're revolutionising how organisations protect their digital assets helping businesses stay secure, resilient, and one step ahead of threats. Working Hours and Location We are based in the UK with employees working remotely. Some roles may have hybrid preference depending on the team. You can ask us about the best working hours and work setup in the recruitment process if there's something that's important to you. We try to be as flexible as possible. All we ask is that everyone is online between our core hours of 10:00-16:00 (UK time) so that everyone overlaps for the majority of the day. It's up to you and your manager to find the right schedule that works for you and your team. Role Purpose As a Penetration Tester , you'll play a central role in delivering high-quality, manual security testing to OnSecurity clients across a variety of sectors. You'll take ownership of full test cycles; scoping, delivery, reporting, and client communication while helping to mentor junior testers and enhance OnSecurity's technical capabilities. This role blends autonomy, technical depth, and real impact. Role Importance, Responsibilities and Impact What you will be doing: Delivering web, API, mobile, and infrastructure penetration tests remotely. Identifying, analysing, and exploiting vulnerabilities beyond automated tools. Producing detailed, high-quality reports for developers and security teams. Collaborating with internal testers to refine methodologies and tooling. Contributing to TestNet and methodology development. Mentoring Junior testers. What you won't be doing: Following rigid scripts, you'll be encouraged to think critically and creatively. Getting lost in bureaucracy, we empower our testers to deliver results via our intuitive portal Timeline for Role Expectations Within 1 month: Become familiar with our testing platform and delivery process. Within 3 months: Lead your own engagements end-to-end and produce client-ready reports. Within 6 months: Contribute to internal tooling, mentor junior testers, and help shape new methodologies. About You This role is a great fit if you . Minimum 2 years' experience delivering penetration tests in one or more disciplines. Strong knowledge of OWASP Top 10 and common vulnerability classes. Excellent written and verbal communication skills. Enthusiastic team player who values collaboration and quality delivery. Compensation What you will get for your hard work . A competitive compensation package . The salary range for this role is roughly £35k - £60k annually, depending on experience. Work at one of the fastest-growing Cyber Security Scale-Ups revolutionising pentesting. A clear progression plan. We want you to keep growing. That means trying new things, leading others, challenging the status quo and owning your impact, always with our complete support. Flexibility : We promote life-work balance at OnSecurity. We encourage everyone on our team to enjoy their life and ensure they have the balance they need to reach their full potential. Work where you work best. We're a distributed team. If you live in Bristol, we have a hybrid approach, if this is something that fits for your team. Otherwise, we are remote, and so we build our ways of working around this. Other benefits: 30 days of paid annual leave, plus bank holidays Company Pension Scheme Private Health Insurance with Vitality Employee Assistance Program (EAP) Group Life Assurance (x4 salary) Enhanced Maternity, Paternity, and Adoption Leave Paid study leave for employees to level up their skills Mentorship and Coaching Annual Performance reviews and recognition for high performance Regular socials and activities, online and in-person.
RecruitmentRevolution.com
Camden, London
Ready to take the next step in your penetration testing career and lead a high-performing team at a respected, fast-growing cybersecurity consultancy? This is your opportunity to join a CREST-certified organisation committed to excellence, innovation and integrity. As our new Penetration Testing Team Leader , you'll play a pivotal role in shaping cutting-edge testing services, developing talented testers, and helping protect clients across government, telecoms, finance, digital currencies and other critical sectors. With structured development, meaningful progression opportunities, and the chance to make a visible impact from day one, this is a role designed for a driven, highly skilled Team Lead who thrives on technical depth, leadership and solving complex security challenges. The Role at a Glance: Penetration Testing Team Leader Remote with travel to client sites and occasional meetings in London, UK or Channel Islands Up to £95,000 DOE Plus Benefits Benefits: 23 days holiday plus Bank Holidays and extra days based on service, 6% contributory pension and career progression opportunities. Growth: A structured career development plan and training Hours: 09:00 am to 17:30 pm Monday - Friday Development Opportunity: Career progression opportunities to develop a growing team of penetration testers and break new ground in testing. Company: Specialist information and cybersecurity consultancy and audit services Company Values: We stand for honesty, integrity and fair practice and are committed to delivering value in every client engagement. Our people are creative, pragmatic and passionate about our purpose. Your Skills / Background: Existing CHECK Team Lead qualification and Team Lead experience. You will also be a tenacious problem solver and communicator with strong client-facing and leadership experience to lead engagements, mentor testers at all levels, and scope complex projects. The Penetration Testing Team Leader Opportunity: As Penetration Testing Team Leader, you will support our clients by delivering excellent penetration testing services and cloud security assessments that are ultimately articulated in high quality and valuable reports. You will deliver hands-on technical penetration testing on a variety of projects and guide and direct the team. In return, you will benefit from an inspiring environment with a team of highly experienced colleagues working across a diverse range of interesting security and assurance projects. This role also includes excellent progression opportunities as we always match enthusiasm and skill with training, opportunity and structured development plans. Key Responsibilities: • Improve and develop penetration testing methodologies, guide project scoping and execution, establish new testing services, and shape the future direction of the testing function with senior management. • Deliver high-quality penetration tests across infrastructure, applications (including APIs and mobile apps), wireless, segmentation and breakout scenarios, and cloud security assessments. • Work with client teams to research vulnerabilities and emerging attack vectors, plan assessments accordingly, and support clients during ongoing incidents. • Conduct vulnerability scans, unauthorised host discovery exercises, analyse findings, and translate results into actionable technical and business-risk recommendations. • Produce high-quality technical reports and create internal documentation, tooling, threat libraries, methodologies, and policies to ensure consistent, informed, and meaningful testing outcomes. • Provide technical presales support, contribute thought-leadership content (papers, articles, online posts, marketing material), and identify business development opportunities. • Mentor, coach, and help build the technical team, supporting their growth in knowledge, skills, and career development. About You: • A driven, battle-tested Team Leader, holding a current CHECK Team Leader qualification and proven senior-level experience • Extensive, hands-on penetration testing expertise backed by deep technical mastery • Fluent in a wide arsenal of security testing tools, using the right tech for maximum impact • Up-to-date, cutting-edge understanding of modern technologies, threats, and security trends • Well-versed in key industry bodies, frameworks, and security standards • Strong ability to translate vulnerabilities into real-world business risk, paired with standout reporting and client presentation skills • Proven track record in growing and developing technical teams, including reviews, appraisals, training plans, and long-term career progression • A credible, personable communicator who builds trust with clients, peers, and technical teams alike • Self-starter with a proactive mindset, comfortable taking initiative and driving outcomes • Genuinely passionate about penetration testing and nurturing teams across all skill levels • Eligible to work in the UK and obtain Government clearance (ILR is required as a minimum but we are unfortunately not able to offer sponsorship) About Us: We are a specialist information and cybersecurity consultancy and expert at understanding information security risks, creating appropriate security destinations and protecting clients from a range of security threats. We hold a CREST certification and offer certification services for PCI-DSS and Cyber Essentials /Essentials Plus. Our clients span telecommunications, Government infrastructure, and digital currencies - covering essential services and critical payment infrastructure. Services include: • Security consulting across the area of security governance, risk, compliance and standards alignment • Penetration testing • Security architecture for cloud and infrastructure • Detection and response • Fractional heads and virtual support • NCSC Assurance service provider for Cyber Essentials and a Certifying Body • Security auditing across varying standards such as ISO27001, NIST, PCI DSS and Cyber Essentials • Training and awareness If you're a proven Penetration Testing Team Leader with CHECK TL status, a passion for advancing security testing, and the drive to mentor and grow a talented team, we'd love to hear from you. Step into a role where your expertise shapes real-world defence, your ideas influence future testing services, and your career continues to accelerate in a supportive, forward-thinking environment. Apply now and take the lead in a role that will challenge, inspire and reward you. Application notice We take your privacy seriously. When you apply, we shall process your details and pass your application to our client for review for this vacancy only. As you might expect you may be contacted by email, text or telephone. Your data is processed on the basis of our legitimate interests in fulfilling the recruitment process. Please refer to our Data Privacy Policy & Notice on our website for further details. If you have any pre-application questions please contact us first quoting the job title & ref. Good luck, Team RR.
Ready to take the next step in your penetration testing career and lead a high-performing team at a respected, fast-growing cybersecurity consultancy? This is your opportunity to join a CREST-certified organisation committed to excellence, innovation and integrity. As our new Penetration Testing Team Leader , you'll play a pivotal role in shaping cutting-edge testing services, developing talented testers, and helping protect clients across government, telecoms, finance, digital currencies and other critical sectors. With structured development, meaningful progression opportunities, and the chance to make a visible impact from day one, this is a role designed for a driven, highly skilled Team Lead who thrives on technical depth, leadership and solving complex security challenges. The Role at a Glance: Penetration Testing Team Leader Remote with travel to client sites and occasional meetings in London, UK or Channel Islands Up to £95,000 DOE Plus Benefits Benefits: 23 days holiday plus Bank Holidays and extra days based on service, 6% contributory pension and career progression opportunities. Growth: A structured career development plan and training Hours: 09:00 am to 17:30 pm Monday - Friday Development Opportunity: Career progression opportunities to develop a growing team of penetration testers and break new ground in testing. Company: Specialist information and cybersecurity consultancy and audit services Company Values: We stand for honesty, integrity and fair practice and are committed to delivering value in every client engagement. Our people are creative, pragmatic and passionate about our purpose. Your Skills / Background: Existing CHECK Team Lead qualification and Team Lead experience. You will also be a tenacious problem solver and communicator with strong client-facing and leadership experience to lead engagements, mentor testers at all levels, and scope complex projects. The Penetration Testing Team Leader Opportunity: As Penetration Testing Team Leader, you will support our clients by delivering excellent penetration testing services and cloud security assessments that are ultimately articulated in high quality and valuable reports. You will deliver hands-on technical penetration testing on a variety of projects and guide and direct the team. In return, you will benefit from an inspiring environment with a team of highly experienced colleagues working across a diverse range of interesting security and assurance projects. This role also includes excellent progression opportunities as we always match enthusiasm and skill with training, opportunity and structured development plans. Key Responsibilities: • Improve and develop penetration testing methodologies, guide project scoping and execution, establish new testing services, and shape the future direction of the testing function with senior management. • Deliver high-quality penetration tests across infrastructure, applications (including APIs and mobile apps), wireless, segmentation and breakout scenarios, and cloud security assessments. • Work with client teams to research vulnerabilities and emerging attack vectors, plan assessments accordingly, and support clients during ongoing incidents. • Conduct vulnerability scans, unauthorised host discovery exercises, analyse findings, and translate results into actionable technical and business-risk recommendations. • Produce high-quality technical reports and create internal documentation, tooling, threat libraries, methodologies, and policies to ensure consistent, informed, and meaningful testing outcomes. • Provide technical presales support, contribute thought-leadership content (papers, articles, online posts, marketing material), and identify business development opportunities. • Mentor, coach, and help build the technical team, supporting their growth in knowledge, skills, and career development. About You: • A driven, battle-tested Team Leader, holding a current CHECK Team Leader qualification and proven senior-level experience • Extensive, hands-on penetration testing expertise backed by deep technical mastery • Fluent in a wide arsenal of security testing tools, using the right tech for maximum impact • Up-to-date, cutting-edge understanding of modern technologies, threats, and security trends • Well-versed in key industry bodies, frameworks, and security standards • Strong ability to translate vulnerabilities into real-world business risk, paired with standout reporting and client presentation skills • Proven track record in growing and developing technical teams, including reviews, appraisals, training plans, and long-term career progression • A credible, personable communicator who builds trust with clients, peers, and technical teams alike • Self-starter with a proactive mindset, comfortable taking initiative and driving outcomes • Genuinely passionate about penetration testing and nurturing teams across all skill levels • Eligible to work in the UK and obtain Government clearance (ILR is required as a minimum but we are unfortunately not able to offer sponsorship) About Us: We are a specialist information and cybersecurity consultancy and expert at understanding information security risks, creating appropriate security destinations and protecting clients from a range of security threats. We hold a CREST certification and offer certification services for PCI-DSS and Cyber Essentials /Essentials Plus. Our clients span telecommunications, Government infrastructure, and digital currencies - covering essential services and critical payment infrastructure. Services include: • Security consulting across the area of security governance, risk, compliance and standards alignment • Penetration testing • Security architecture for cloud and infrastructure • Detection and response • Fractional heads and virtual support • NCSC Assurance service provider for Cyber Essentials and a Certifying Body • Security auditing across varying standards such as ISO27001, NIST, PCI DSS and Cyber Essentials • Training and awareness If you're a proven Penetration Testing Team Leader with CHECK TL status, a passion for advancing security testing, and the drive to mentor and grow a talented team, we'd love to hear from you. Step into a role where your expertise shapes real-world defence, your ideas influence future testing services, and your career continues to accelerate in a supportive, forward-thinking environment. Apply now and take the lead in a role that will challenge, inspire and reward you. Application notice We take your privacy seriously. When you apply, we shall process your details and pass your application to our client for review for this vacancy only. As you might expect you may be contacted by email, text or telephone. Your data is processed on the basis of our legitimate interests in fulfilling the recruitment process. Please refer to our Data Privacy Policy & Notice on our website for further details. If you have any pre-application questions please contact us first quoting the job title & ref. Good luck, Team RR.
