18 of 18 Offensive Security Jobs in the South East

Offensive Security Tester (Red Team) London/WFH to £70k Opportunity to progress your career as an Offensive Security Tester at a rapidly expanding scale-up software house that is developing a highly complex network cyber security platform; you'll be working on Greenfield projects, collaborating with and learning from a hugely talented team. Your … role: As an Offensive Security Tester you will manage client engagements, perform security tests and report findings; you'll be using industry standard combined with in-house developed tools as well as carrying out manual reviews to discover any issues with customer infrastructure and web applications. You'll be pro-active and will have the opportunity within … a Russel Group or top tier world university - Computer Science, Engineering, Physics or Mathematics; MSc or PhD advantageous You're OSCP or CRT certified You have commercial experience with Offensive Security, Red Team testing or Penetration testing You have a keen interest in Cyber Security and understanding of key concepts and protocols You can code with any More ❯

Senior/Principal Offensive Security Consultant £100k Location: Hybrid (2 days per month in London) Salary: £80,000 - £100,000 + benefits Are you a Senior Offensive Security Consultant or Principal Penetration Tester ready to take the next step into Red Teaming and Adversarial Simulation This is your opportunity to join an agile, rapidly growing UK … cyber security consultancy where you can own and shape an entire offensive service line , build advanced infrastructure, and contribute to research and tooling that truly make an impact. About the Role As a Senior/Principal Offensive Consultant , you'll lead complex technical engagements that go beyond standard penetration testing - focusing on advanced exploitative infrastructure testing , Active … initiatives - including whitepapers, presentations, and thought leadership. Mentor junior consultants, helping grow the internal capability and knowledge base. About You You'll be an experienced Penetration Testing Consultant/Offensive Security Professional who combines strong technical capability with commercial awareness and client empathy. You'll thrive on pushing boundaries, building new services, and seeing your work directly shape More ❯

Offensive Security Researcher/Security Consultant | Elite Cybersecurity Scale-Up | Fully Remote (Global) Ready to take your offensive security skills to the next level? This is your chance to join a fast-scaling cybersecurity innovator , backed by funding, recognised by Gartner, and trusted by some of the world’s biggest enterprises and critical infrastructure providers. … They’re building technology that helps security teams outrun real-world threats — and they’re looking for offensive security experts who thrive on finding vulnerabilities where others can’t. What you’ll be doing: Spending your days doing what you love: hacking (professionally speaking) — discovering innovative, high-impact vulnerabilities across global enterprises Hunting for weaknesses that matter … RCE > weak SSL ciphers Collaborating with other seasoned offensive experts to invent new TTPs and attack modern infrastructure Researching cutting-edge attack vectors across cloud, SaaS, web stacks, and internet-exposed infrastructure Partnering with Red Team Engineers to scale and automate your discoveries so nothing gets wasted (Optional but encouraged) Presenting your research at industry conferences — with full company More ❯

Offensive Security Researcher/Security Consultant | Elite Cybersecurity Scale-Up | Fully Remote (Global) Ready to take your offensive security skills to the next level? This is your chance to join a fast-scaling cybersecurity innovator , backed by funding, recognised by Gartner, and trusted by some of the world’s biggest enterprises and critical infrastructure providers. … They’re building technology that helps security teams outrun real-world threats — and they’re looking for offensive security experts who thrive on finding vulnerabilities where others can’t. What you’ll be doing: Spending your days doing what you love: hacking (professionally speaking) — discovering innovative, high-impact vulnerabilities across global enterprises Hunting for weaknesses that matter … RCE > weak SSL ciphers Collaborating with other seasoned offensive experts to invent new TTPs and attack modern infrastructure Researching cutting-edge attack vectors across cloud, SaaS, web stacks, and internet-exposed infrastructure Partnering with Red Team Engineers to scale and automate your discoveries so nothing gets wasted (Optional but encouraged) Presenting your research at industry conferences — with full company More ❯

HackerOne is a global leader in offensive security solutions. Our HackerOne Platform combines AI with the ingenuity of the largest community of security researchers to find and fix security, privacy, and AI vulnerabilities across the software development lifecycle. The platform offers bug bounty, vulnerability disclosure, pentesting, AI red teaming, and code security. We are trusted by … a Best Workplace for Innovators by Fast Company in 2023 and a Most Loved Workplace for Young Professionals in 2024. HackerOne is at a pivotal inflection point in the security industry. Offensive security is no longer optional – it is the standard for forward-thinking companies that want to build trust and resilience in a world where AI … driven innovation and adversaries are moving faster than ever. With the industry shifting, HackerOne stands apart: we combine the ingenuity of the largest security research community with a best-in-class AI-powered platform, trusted by the world's top organizations. HackerOne Values HackerOne is dedicated to fostering a strong and inclusive culture. HackerOne is Customer Obsessed and prioritizes More ❯

On-site preferred) Salary: Up to £90,000 + Benefits + Bonus Employment Type: Permanent Overview We are seeking a highly skilled Red Team Specialist to join our clients security function. You will lead and execute offensive security operations, simulating real-world adversaries to identify weaknesses in our organisation's technology, processes, and human controls. This role … is ideal for an individual with deep technical expertise, strong threat-emulation experience, and the ability to translate complex findings into actionable security improvements. Key Responsibilities Plan, execute, and report on red team engagements including full-scope attack simulations Perform targeted adversary emulation across network, application, cloud, and physical domains Develop exploit chains and bypass advanced detection and security … emerging attacker TTPs, threat actors, and exploit techniques Mentor junior team members and contribute to tooling, methodology, and lab development Required Skills & Experience 3+ years' experience in red teaming, offensive security, or advanced penetration testing Strong knowledge of attacker frameworks (e.g., MITRE ATT&CK, NIST adversary simulation guidelines) Highly proficient with red team tools and techniques (e.g., Cobalt More ❯

/Flexible) Salary: Up to £80,000 + Bonus + Benefits Employment Type: Permanent Overview We are seeking an experienced Senior Penetration Tester with a strong background in infrastructure security testing to join a growing offensive security team. The ideal candidate will have deep technical expertise, the ability to lead and independently deliver complex engagements, and a … passion for uncovering and exploiting vulnerabilities across enterprise environments. You will play a key role in strengthening the organisation's security posture by conducting infrastructure-focused assessments, mentoring junior testers, and influencing remediation strategies. Key Responsibilities Deliver internal and external network and infrastructure penetration tests , including on-premises and cloud-hosted environments Perform testing of Windows & Linux infrastructure, Active … Directory, network services, and security appliances Conduct vulnerability exploitation , privilege escalation, and lateral movement to demonstrate full attack paths Lead small engagement teams and oversee delivery quality, documentation, and client communication Produce high-quality, concise, and risk-aligned reports with actionable remediation guidance Support scoping calls, stakeholder workshops, and post-engagement debriefs Contribute to tooling, methodology enhancement, and internal More ❯

Role: Cyber Security Analyst Location: London/Manchester/Bristol Salary: Competitive salary and package dependent on experience Career Level: Specialist Please Note: Any offer of employment is subject to satisfactory BPSS and SC security clearance which typically requires 5 years continuous UK address history usually including no periods of 30 consecutive days or more spent outside of … of application. Note: The above information relates to a specific client requirement Our Cyber Practice is a fast-growing community of industry leading experts. The practice covers Assurance, Compliance, Security Operations (SecOps), Offensive Security and Security Research. It is critical that the relevance and quality of the services that we provide is maintained and augmented and … are looking to make your mark on a rapidly growing SecOps team with some very exciting clients, look no further. We are searching for a passionate and enthusiastic Cyber Security Analyst to join our Blue Team. The ideal candidate will be a self-starter with an inquisitive nature and a keen interest when it comes to technical cybersecurity topics More ❯

Job Description – Cyber Security Generalist Manager Role Location – Any UK Salary: Competitive (based on experience) Level: Accenture will be hiring at Manager level Please Note: Any offer of employment is subject to satisfactory BPSS and SC security clearance which typically requires 5 years continuous UK address history usually including no periods of 30 consecutive days or more spent … of application. Note: The above information relates to a specific client requirement Our Cyber Practice is a fast-growing community of industry leading experts. The practice covers Assurance, Compliance, Security Operations (SecOps), Offensive Security and Security Research. It is critical that the relevance and quality of the services that we provide is maintained and augmented and … that the team members have every opportunity to grow and learn with the organisation. We are looking for a cyber security generalist consultant with experience in solving complex cyber security problems utilising your technical expertise and learned experience. As a cyber generalist we expect you to demonstrate advanced skills and a high level of expertise across multiple facets More ❯

Defence capabilities? This role offers the opportunity to contribute to the development and optimisation of advanced threat detection systems within a highly secure environment. You will work within a Security Operations Centre (SOC), designing and maintaining detection logic across SIEM (Security Information and Event Management) and EDR (Endpoint Detection and Response) platforms. Your work will help identify and … and automation workflows to support incident response and continuous improvement. Key responsibilities include: Designing and tuning detection rules and use cases in SIEM and EDR platforms Monitoring and investigating security alerts to identify potential threats Conducting proactive threat hunting using MITRE ATT&CK and threat intelligence sources Collaborating with incident response teams to support investigations and containment Enhancing detection … depth, and clear communication will be well suited to this role. Essential Criteria To be successful, you must demonstrate: Relevant HNC (i.e. Level 4 or higher) qualification in Cyber Security Or Computer Science, or Networks OR certifications such as CompTIA Security+, ISACA OR equivalent experience Strong hands-on experience with SIEM platforms (Elastic Security mandatory; Sentinel or Splunk More ❯

Defence capabilities? This role offers the opportunity to contribute to the development and optimisation of advanced threat detection systems within a highly secure environment. You will work within a Security Operations Centre (SOC), designing and maintaining detection logic across SIEM (Security Information and Event Management) and EDR (Endpoint Detection and Response) platforms. Your work will help identify and … and automation workflows to support incident response and continuous improvement. Key responsibilities include: Designing and tuning detection rules and use cases in SIEM and EDR platforms Monitoring and investigating security alerts to identify potential threats Conducting proactive threat hunting using MITRE ATT&CK and threat intelligence sources Collaborating with incident response teams to support investigations and containment Enhancing detection … depth, and clear communication will be well suited to this role. Essential Criteria To be successful, you must demonstrate: Relevant HNC (i.e. Level 4 or higher) qualification in Cyber Security Or Computer Science, or Networks OR certifications such as CompTIA Security+, ISACA OR equivalent experience Strong hands-on experience with SIEM platforms (Elastic Security mandatory; Sentinel or Splunk More ❯

/Manchester/Bristol Salary: Competitive salary and package dependent on experience Career Level: Associate Manager Please Note: Any offer of employment is subject to satisfactory BPSS and SC security clearance which typically requires 5 years continuous UK address history usually including no periods of 30 consecutive days or more spent outside of the UK and declaration of being … of application. Note: The above information relates to a specific client requirement Our Cyber Practice is a fast-growing community of industry leading experts. The practice covers Assurance, Compliance, Security Operations (SecOps), Offensive Security and Security Research. It is critical that the relevance and quality of the services that we provide is maintained and augmented and … you are looking to make your mark on a rapidly growing SecOps team with some very exciting clients, look no further. We are searching for an experienced technical Cyber Security Operations Specialist to join our Blue Team. This is a senior role, and the ideal candidate will be a self-starter with an inquisitive nature, keen attention to detail More ❯

For further details please visit Purpose of Position The Senior SecOps Engineer's primary responsibility is to provide Pantheon with in depth technical expertise working in Pantheon's IT Security Team. The Senior SecOps Engineer will also participate in technical research and development to enable continuing innovation within the IT security landscape at Pantheon. The role incumbent must … also be required to provide directed support and service for other Pantheon offices around the world. Key Responsibilities Governance – ensure all solutions are implemented in accordance with Pantheon's security best practice. Adhere to applicable regulatory and compliance related operating requirements. Work with systems development and external suppliers to resolve often highly technical or contentious security issues and … conflicts to ensure that projects and work packages are delivered on time and within budget. Actively review, monitor and improve network and cloud infrastructure security, undertake a regular programme of self-audit and base lining by utilising the appropriate tools and in conjunction with formal audits as conducted by both internal audit and external audit & penetration testers. Ensure changes More ❯

Role Location – Any UK Salary: Competitive (based on experience) Level: Accenture will be hiring at Specialist Please Note: Any offer of employment is subject to satisfactory BPSS and SC security clearance which typically requires 5 years continuous UK address history usually including no periods of 30 consecutive days or more spent outside of the UK and declaration of being … of application. Note: The above information relates to a specific client requirement Our Cyber Practice is a fast-growing community of industry leading experts. The practice covers Assurance, Compliance, Security Operations (SecOps), Offensive Security and Security Research. It is critical that the relevance and quality of the services that we provide is maintained and augmented and More ❯

Role: Red Team Operator Rate: TBC Location: London, City. Contract length: 5 months -> Perm Conversion Requirements: 3+ years of experience in offensive security, including red teaming and penetration testing Strong understanding of the MITRE ATT&CK framework and threat emulation methodologies Proficiency in offensive tools (Cobalt Strike, Sliver, Metasploit, etc.) and custom payload development Experience with evasion More ❯

that really matter This isn’t just another engineering role. It’s your chance to build technology that protects enterprises from real-world attacks while shaping the future of offensive security at scale. Interested? Apply now — this one won’t stay open for long. More ❯

the market. Recognised by Gartner, backed by top-tier VC investors, and trusted by Fortune 500s and critical infrastructure providers, this scale-up is building the future of continuous offensive security. They’re now seeking an ambitious Head of Applications to lead their global Application Technology team across the UK, Singapore, and the US. This is a high-impact … understanding of SaaS fundamentals: onboarding, authentication, SSO, granular authorisation, multi-tenancy Familiarity with workflow orchestration, asynchronous tasks, and event-driven architecture Ideally, exposure to cybersecurity platforms or large-scale security data systems Why join? Competitive compensation & benefits Key leadership role in a high-growth cybersecurity scale-up Opportunity to shape global engineering strategy and culture Work with cutting-edge … lead a global engineering function at a company reshaping how the world’s biggest organisations stay ahead of attackers. If you’re a proven applications leader with SaaS and security experience — this one’s for you. Apply now — your next big challenge starts here. More ❯

the market. Recognised by Gartner, backed by top-tier VC investors, and trusted by Fortune 500s and critical infrastructure providers, this scale-up is building the future of continuous offensive security. They’re now seeking an ambitious Head of Applications to lead their global Application Technology team across the UK, Singapore, and the US. This is a high-impact … understanding of SaaS fundamentals: onboarding, authentication, SSO, granular authorisation, multi-tenancy Familiarity with workflow orchestration, asynchronous tasks, and event-driven architecture Ideally, exposure to cybersecurity platforms or large-scale security data systems Why join? Competitive compensation & benefits Key leadership role in a high-growth cybersecurity scale-up Opportunity to shape global engineering strategy and culture Work with cutting-edge … lead a global engineering function at a company reshaping how the world’s biggest organisations stay ahead of attackers. If you’re a proven applications leader with SaaS and security experience — this one’s for you. Apply now — your next big challenge starts here. More ❯