26 to 50 of 59 Offensive Security Jobs in the UK

Senior Red Team Operator to join a cutting-edge cybersecurity team focused on conducting advanced adversarial threat emulation, ideal for experienced Red Team professionals with a deep background in offensive security. You’ll be part of a strategic security function responsible for simulating sophisticated cyber and physical attacks, identifying weaknesses across technology, people, and processes, and supporting the … Red Team operations across cyber, social, physical, and technical domains. Designing and executing realistic attack simulations to assess and improve detection and response capabilities. Collaborating with stakeholders to translate security findings into actionable insights and mitigation strategies. Leading or supporting the response and investigation of complex security incidents. Advising on emerging threats, offensive techniques, and security … enhance organisational resilience. Influencing technical strategy, controls, and risk posture at a senior level. What We're Looking For 7+ years of hands-on experience in Red Teaming or offensive security roles. Deep technical knowledge of threat emulation techniques including Command and Control frameworks, post-exploitation tactics, EDR evasion, malware or exploit development. Proficiency in at least one More ❯

Cyber Security Consultant (Assurance & Advisory) - Top 10 FirmCity of London (Hybrid)£40,000 - £65,000 Butler Rose Public Practice is delighted to be supporting our client, a top 10 accounting firm based in London that are eager to recruit a Cyber Security Consultant (Assurance & Advisory) to support their Risk Assurance consulting team. In this role, you'll deliver … a wide range of cyber security assurance and advisory services to high-profile clients across multiple industries, helping them manage risk, strengthen defences, and respond effectively to emerging threats. Key Responsibilities: Support technical scoping activities as part of client engagements. Deliver fieldwork and prepare clear, insightful assignment reports. Manage and prioritise tasks effectively, ensuring timely completion. Stay up to … date with the latest cyber-attack trends and technology developments. Conduct cyber risk and control assessments, design cyber programmes, and deliver offensive security services such as vulnerability assessments and incident response simulations. Key Requirements: Currently hold or be working towards a recognised cyber security certification. Practical experience in conducting cyber risk and control assessments. Relevant hands-on More ❯

largest live entertainment company, composed of global market leaders: Ticketmaster, Live Nation Concerts, and Live Nation Media & Sponsorship. With 550 million fans and operations in over 40 countries, our security mission is to ensure those experiences remain uninterrupted and safe. The Detection and Response Team (DART) plays a key role in maintaining that trust, security, and resilience. Job … Purpose As a Senior DART Analyst , you will support the detection and response mission by leading complex investigations, guiding junior analysts, and ensuring timely response to security incidents. Reporting to the DART Lead, you will assist in operational execution across shifts, ensure adherence to best practices, and contribute to the development of tools, playbooks, and detection logic. This role … combines technical depth, mentorship, and reliability during critical security events. Key Responsibilities Security Monitoring & Incident Response Monitor and triage alerts from SIEM, EDR, and NDR platforms, escalating or investigating as appropriate. Conduct thorough investigations to determine scope, impact, and root cause of security events. Collaborate with cross-functional teams during containment and remediation efforts. Document findings clearly More ❯

Bootcamp, tailored for individuals looking to gain practical, job-ready skills in protecting digital assets and systems. The bootcamp aims to enhance participants' abilities in areas such as network security, ethical hacking, incident response, and security operations, enabling them to secure new or higher-value opportunities in the cybersecurity field. You will be responsible for delivering engaging and … interactive sessions, guiding learners through complex security concepts, and helping them build practical, defensive, and offensive security skills. The ideal candidate will be confident teaching a range of cybersecurity topics, adaptable to different learner needs, and passionate about supporting underrepresented individuals in building successful careers in cybersecurity. The majority of course content will be provided, but you … offering feedback for continuous improvement Areas of Knowledge We are looking for people who have working experience or comfortable teaching (or able to learn) in the following areas: Network Security (e.g., Firewalls, IDS/IPS, VPNs) Operating System Security (e.g., Windows, Linux hardening) Ethical Hacking and Penetration Testing (e.g., reconnaissance, vulnerability scanning, exploitation) Security Operations (e.g., SIEM More ❯

Bootcamp, tailored for individuals looking to gain practical, job-ready skills in protecting digital assets and systems. The bootcamp aims to enhance participants' abilities in areas such as network security, ethical hacking, incident response, and security operations, enabling them to secure new or higher-value opportunities in the cybersecurity field. You will be responsible for delivering engaging and … interactive sessions, guiding learners through complex security concepts, and helping them build practical, defensive, and offensive security skills. The ideal candidate will be confident teaching a range of cybersecurity topics, adaptable to different learner needs, and passionate about supporting underrepresented individuals in building successful careers in cybersecurity. The majority of course content will be provided, but you … offering feedback for continuous improvement Areas of Knowledge We are looking for people who have working experience or comfortable teaching (or able to learn) in the following areas: Network Security (e.g., Firewalls, IDS/IPS, VPNs) Operating System Security (e.g., Windows, Linux hardening) Ethical Hacking and Penetration Testing (e.g., reconnaissance, vulnerability scanning, exploitation) Security Operations (e.g., SIEM More ❯

Bootcamp, tailored for individuals looking to gain practical, job-ready skills in protecting digital assets and systems. The bootcamp aims to enhance participants' abilities in areas such as network security, ethical hacking, incident response, and security operations, enabling them to secure new or higher-value opportunities in the cybersecurity field. You will be responsible for delivering engaging and … interactive sessions, guiding learners through complex security concepts, and helping them build practical, defensive, and offensive security skills. The ideal candidate will be confident teaching a range of cybersecurity topics, adaptable to different learner needs, and passionate about supporting underrepresented individuals in building successful careers in cybersecurity. The majority of course content will be provided, but you … offering feedback for continuous improvement Areas of Knowledge We are looking for people who have working experience or comfortable teaching (or able to learn) in the following areas: Network Security (e.g., Firewalls, IDS/IPS, VPNs) Operating System Security (e.g., Windows, Linux hardening) Ethical Hacking and Penetration Testing (e.g., reconnaissance, vulnerability scanning, exploitation) Security Operations (e.g., SIEM More ❯

Location: Central London, Greater London - United Kingdom Type: Permanent Senior Red Team Operator Location: Remote (UK-based) Salary: £75,000 - £98,000 + Discretionary Bonus Are you a seasoned offensive security professional ready to take your expertise to the next level? This is an opportunity to join a cutting-edge Red Team, where you'll emulate real-world … test and improve organizational resilience. Identify and exploit weaknesses in systems, processes, and human behavior. Collaborate with stakeholders to communicate findings and recommend mitigation strategies. Research and develop new offensive techniques, tools, and methodologies. What We're Looking For: Proven experience in Red Teaming or offensive security roles. Deep understanding of Command and Control frameworks. Strong technical … least one programming language. Highly Valued Skills: Strategic thinking and business acumen. Experience in risk assessment and control implementation. Ability to lead or contribute to multi-year, cross-functional security initiatives. This role offers the chance to work remotely within the UK, with access to industry-leading tools and a collaborative environment focused on continuous improvement and innovation. Reference More ❯

A global quantitative trading firm specializing in algorithmic and high-frequency trading (HFT) is hiring a Cyber Security Engineer (2-4 years' experience) to operate in a broad, vendor-agnostic security environment. This fully onsite role (5 days per week) offers exposure to cutting-edge security challenges across multiple domains. This is an opportunity to deep-dive … into security engineering, incident response, and automation in a high-impact role. If you're a technically strong, hands-on engineer looking for broad exposure and real security challenges, we want to hear from you! Responsibilities Owning security projects end to end - from design to execution Engineering, automating, and securing infrastructure, networks, and cloud environments Hands-on … engagement in Incident Response, security assessments, and remediation Working across networking, firewalls, and security (Palo Alto, Fortinet, all major cloud providers) Building and automating with Terraform, Ansible, Golang, Python, HashiCorp Leveraging offensive security knowledge (OSCP, Hack The Box, pentesting, SQL injection, homelabbing) Collaborating with multiple teams and communicating effectively across the business Skills & Requirements Security More ❯

for electrifying their homes, shifting usage to off-peak hours, and supporting grid stability-critical for scaling AI and energy-intensive industries. We're looking for a Chief Information Security Officer (CISO) to lead our company-wide security strategy. You'll protect our infrastructure, digital assets, and customer data while enabling fast, secure growth. Key Responsibilities Security Strategy & Leadership Define and lead Fuse's security strategy across infrastructure, applications, and data. Lead hands-on development of security roadmaps, maturity models, and control frameworks tailored to Fuse's risk profile. Directly contribute to architecture reviews, threat modelling sessions, and key design decisions across product and platform teams. Build and mentor a high-performing security team, including hiring, coaching, and managing performance. Develop KPIs and reporting structures to measure and communicate security posture to leadership and the board. Advise the executive team on security risks, regulatory exposure, and investment priorities to support long-term growth. Governance & Compliance Own company-wide security governance, including data protection, access control, and insider risk. Ensure More ❯

Location: Cambridge, UK (hybrid) with travel to the office twice per week. We are looking for an experienced Security Engineer to join our Cyber team. You will help us build out a world class incident response function that will navigate challenging security incidents, drive process improvement, develop an open culture where we grow from our mistakes as an … across all threats to our Studio and gaming environments. Please note that this position will require participation in an on-call rotation. What you'll be doing: Respond to security events, triage, perform investigations, incident analysis, and communicate clearly and efficiently to stakeholders Contribute to improving processes, procedures, and technologies used for detection and response, enabling us to improve … after each incident Develop and run tools to gather security telemetry data from cloud production systems Automate workflows and improve identification and response time for security events Build and optimize detection rules, allowing us to spend our cycles on the alerts that matter Develop runbooks and incident playbooks for new and existing detections Lead Threat hunting practices, suggest More ❯

C Cyber Security Tech Lead Taking the lead role as a Cyber Security Consultant , you will be principally responsible for both the functional and technical security aspects of the organization. O versight includes responding to critical incidents and threats , working closely with the SOC team and Head of Security teams on tactical and strategic development of … the security function within a top-tier business. This role emphasizes project-related work, requiring a strong all-round cybersecurity background with experience in delivering standards such as ISO2700x, Cyber Essentials, CIS, NIST , and familiarity with emerging UK government cybersecurity initiatives. Demonstrable knowledge of cybersecurity principles, theories, practices, and techniques, including offensive security is essential. Technical proficiency … as CISSP, CISM, CISA, or CEH are preferred. Experience in implementing and adhering to controls within a growing organization, especially in new territories, would be beneficial. Additionally, experience in security architecture would be valuable. This is a hybrid role requiring presence in the office once a week. More ❯

and fast-moving, delivering a comprehensive range of professional services and managed services both onsite and remotely. The Cyber Practice consists of highly skilled professionals delivering a myriad of offensive security testing and governance, risk, and compliance (GRC) services in support of Claranet’s vision. Taking a customer first approach, Claranet’s Cyber Practice prides itself in providing … world-class services designed to meet the specific and individual needs of all customers, across all industries. Position Summary As a Security Consultant, you will be responsible for delivering customer projects across a range of GRC services in line with your current capabilities, and future capabilities after suitable training/mentoring. You will be responsible for providing professional service … delivery including but not limited to; consultancy services and audit/assessment services against multiple security compliance frameworks/standards, and delivery of other GRC consultancy services as required to service our customers’ needs. This role will require additional activities as part of your job responsibilities to support the delivery of services which will include, but not limited to More ❯

our six solutions, expanding and developing our team of expertconsultants, embracing a digital-first approach, strengthening our globalpresence, and building strong client relationships We are seeking an enthusiastic Cyber Security Consultantto join our team. Working alongside ourexperienced team of specialists, you'll be delivering offensive … securityservices including digital footprint reconnaissance, social engineering,penetration testing and vulnerability assessments and more to high profileclients across all industries. The purpose of this role is to deliver our offensivesecurity services including digital footprint reconnaissance, socialengineering, vulnerability assessments, penetration testing, threat modelling,cyber-attack simulation exercises, and more to high profile clients across allindustries. The purpose of this role is … to deliver our Cyber Security services across our broad range of assurance and advisory engagementsto high profile clients across all industries. We are seeking an enthusiastic Cyber Security Consultantto join our team. Working alongside ourexperienced team of specialists, you'll be delivering cyber risk and control assessments,developing cyber programmes as well as delivering offensive security More ❯

At Instil we specialise in providing human-focused security and penetration testing services for web applications, cloud infrastructure and mobile applications. The Role We are looking for a Mid/Senior Penetration Tester to join our dynamic team based in Belfast. As a Pen Tester, you will be part of the delivery team, conducting penetration tests and vulnerability assessments … across a range of technologies and a wide range of customers including software, fintech, manufacturing, engineering, legal, and public sector. Your insights will be crucial in identifying security weaknesses and helping clients fortify their systems. We offer varied, challenging work in a supportive environment where you will find yourself constantly evolving and learning, whilst studying towards CREST (CPSA/… Working Flexible Working Hours Summer Working Hours 35 Days Holiday Private Pension (8% Employer, 5% Employee) Private Healthcare Life Assurance Cycle to Work Scheme Day to Day Probe & exploit security vulnerabilities in client's Infrastructure/cloud, Web Applications and Mobile Applications using a variety of penetration tests. Write detailed reports outlining vulnerabilities and providing actionable recommendations. Collaborate with More ❯

At Instil we specialise in providing human-focused security and penetration testing services for web applications, cloud infrastructure and mobile applications. The Role We are looking for a Penetration Tester to join our dynamic team based in Belfast. As a Pen Tester, you will be part of the delivery team, conducting penetration tests and vulnerability assessments across a range … of technologies and a wide range of customers including software, fintech, manufacturing, engineering, legal, and public sector. Your insights will be crucial in identifying security weaknesses and helping clients fortify their systems. We offer varied, challenging work in a supportive environment where you will find yourself constantly evolving and learning, whilst studying towards CREST (CPSA/CRT/CCT … in Northern Ireland. Competitive Salary & Annual Bonus Hybrid Working Flexible Working Hours Summer Working Hours 35 Days Holiday Life Assurance Cycle to Work Scheme Day to Day Probe & exploit security vulnerabilities in client's Infrastructure/cloud, Web Applications and Mobile Applications using a variety of penetration tests. Write detailed reports outlining vulnerabilities and providing actionable recommendations. Collaborate with More ❯

team provides timely , comprehensive intelligence that empowers high-fidelity detections, identifies known and emerging threats, and equips our customers with the knowledge to act decisively. Via our industry-leading security operations platform, GreyMatter , we produce operational, strategic, and tactical intelligence that delivers actionable insights into threat actor tactics, techniques, and procedures . Beyond this, we act as a thought … communication Experience working in online intelligence investigations and analysis, including strong OSINT skills What makes you uncommon? Understanding of cybersecurity and IT disciplines including networking, operating systems, authentication protocols, security incident response , and enterprise technical security solutions (SIEM, IDS/IPS, firewall solutions, offensive security tools ) Basic knowledge of Linux/Unix operating systems Certifications such … or statistical analysis skills Familiarity with open, deep, and dark web cybercriminal marketplaces and forums Experience of online HUMINT operations and/or social engineering techniques Capacity to read security logs and code to understand the content and context About Us Why ReliaQuest? Making security possible for our customers starts with our commitment to our people. We inspire More ❯

Are you a Penetration Tester with a passion for working in the government and defense sectors? Join a global consultancy specializing in security and risk management, helping organizations understand threats to their critical assets and implement intelligent security solutions. With a strong presence in the UK and operations worldwide, the company enable clients to navigate complex security challenges, ensuring the safety of their people, data, and reputation. The company is looking for a skilled Penetration Tester/Vulnerability Assessor to join the growing security team. If you would like to learn more about this opportunity, feel free to reach out and apply today! Key Responsibilities: Perform vulnerability assessments and penetration tests against infrastructure, web applications … best practices (e.g. OWASP, NIST, CHECK) Contribute to continuous service improvements and knowledge sharing within the team Stay up to date with emerging threats, tools, and techniques in the offensive security space Essential Skills and Experience: Hands-on experience with penetration testing or vulnerability assessments (commercial or demonstrable practical knowledge) Familiarity with tools such as Burp Suite, Nmap More ❯

on threat intel and adversary emulation. Deep understanding of OT/IT systems, common vulnerabilities, network protocols, cryptography, and attack vectors. Proficiency in tools and frameworks used in both offensive security and threat intelligence. Proven ability to scope, manage, and deliver complex engagements with excellent communication across technical and non-technical stakeholders. CREST CRT/CHECK (or higher … Clearance. Desirable Skills: Experience with Breach Attack Simulation tools and vulnerability management processes. Familiarity with ISO 27001, risk management frameworks, and compliance-oriented testing. Hands-on knowledge of cloud security in AWS, Azure, or GCP. Advanced cybersecurity certifications such as CISM, CISSP, CREST CCT, or ECSA. Location: London-Based Hybrid/Remote Options Available Benefits: Work in a high … impact role where your expertise directly influences the resilience of major organisations. Join a collaborative, technically elite team focused on cutting-edge offensive techniques and driving genuine security improvements. Salary: Up to £90,000 Per Annum (Basic More ❯

A UK-based cyber security consultancy is seeking a CHECK Team Member or Team Leader certified Penetration Tester to join their growing offensive security team. This is an opportunity to work on high-assurance engagements across public and private sector clients, delivering technical assessments to support risk reduction, compliance, and threat readiness. Key Responsibilities Deliver infrastructure and More ❯

Executive Principal Security Consultant - Technical Assurance page is loaded Executive Principal Security Consultant - Technical Assurance Apply locations Manchester Cheltenham London time type Full time posted on Posted 3 Days Ago time left to apply End Date: August 31, 2025 (22 days left to apply) job requisition id R9599 Executive Principal Consultant - Red Team Cheltenham/Manchester/London … Our role: As an Executive Principal Consultant within the Red Teaming practice, you'll take a leading role in delivering high-end adversary simulation engagements for clients with mature security postures and critical risk profiles. You'll operate across the entire attack lifecycle from initial access and evasion of EDR, through lateral movement and objective completion while ensuring the … safety, confidentiality, and operational integrity of every engagement. This role is central to advancing NCC Group's offensive security capability while helping our clients understand, detect, and respond to sophisticated threats in real-world scenarios. Day to day You'll lead the design, planning, and execution of Red Team and adversary simulation engagements across critical sectors such as More ❯

in which we work and live. It is personal to all of us." - Julie Sweet, Accenture CEO In our team you will: Gain exposure to diverse industries and advanced security architectures, as you lead sophisticated simulated cyber-attacks against our globally renowned clients, employing the very latest threat actor tools and techniques. Work closely with top-tier security experts in our threat intelligence and incident response teams, strengthening your already strong offensive security skills and pushing the boundaries of cybersecurity innovation. Engage in ongoing training, certification and conferences to stay at the forefront of the cyber security landscape, equipped with the latest tools and methodologies. Contribute to enhancing the cybersecurity resilience of some of … CBEST, TIBER, iCAST or similar assessments. Qualification Set yourself apart: Prior experience in a consultancy role would be advantageous, but not essential. Experience of leading and managing teams of security professionals. Experience in blue team, purple team or defensive security roles is also beneficial. What's in it for you At Accenture in addition to a competitive basic More ❯

About Us: Beazley Security is a global cybersecurity firm committed to helping clients enable advanced cyber defences that reduce risk with quantifiable results. We’re comprised of top talent from private industry, government, intelligence, and law enforcement who are specialists in threat detection, incident response, digital forensics, offensive security, risk management, and cyber resilience. As a subsidiary … Beazley Insurance, we’ve been at the forefront of cyber insurance management and breach response activities for business clients in the US, UK, and Europe since 2017. As Beazley Security, the company will have an expanded scope, leveraging nearly two decades of cyber incident experience, a strong services division, and a business strategy focused on growth, to realize our … We believe these values are essential to creating a strong and inclusive workplace culture, as well as to delivering world-class cybersecurity solutions to our clients worldwide. As Beazley Security, these values will continue to thrive, with an extra emphasis on the expansion of our capabilities and capacity to help solve unique client challenges. Summary: We are seeking a More ❯

Are you looking for an exciting new opportunity? Join a trusted security and compliance partner offering comprehensive services including GRC consulting, CREST-accredited penetration testing, and an industry-leading vulnerability management service. As the number one Global Service Partner of Vanta, the company has a proven track record of helping hundreds of businesses from tech startups to global industry … leaders achieve their security compliance goals, including SOC 2 and ISO 27001. With a focus on delivering trust and excellence, it ensures that companies of all sizes can effectively manage their security posture and compliance needs. If you would like to learn more about this opportunity, feel free to reach out and apply today! Responsibilities: Work across the … penetration testing and red teaming Contribute to client relationships and leading high-level engagements Scoping and delivering advanced red team assessments Mentoring more junior team members Supporting innovation through offensive security research Required Skills/Qualifications: Minimum 7 years of penetration testing experience, with at least 4 years in red teaming Strong hands-on background across a range 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 More ❯

ob Title: Cyber Security Analyst - DV Location: Fully remote Contract Duration : Until Feb 2026 (ad-hoc days as and when needed. Around 10 days/month) Daily Rate: £730.40/day (Umbrella - Maximum) IR35 Status : Inside IR35 Security Clearance: DV Minimum Requirement: Have experience with dealing with real world threats in the serious and organised crime or cyber … Cybersecurity Analyst (CySA+) or a similar certification GIAC Cyber Threat Intelligence (GCTI) or a similar certification GIAC Reverse Engineering Malware (GREM) or a similar certification Certified Ethical Hacker (CEH) Offensive Security Certified Professional (OSCP) or a similar certification Any mix of 2 of the above qualifications* The Role: The purpose of this project is to understand how 'real More ❯