26 to 46 of 46 Offensive Security Jobs in England

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 ❯

their capabilities. Our Penetration Testers work with organisations of all sizes and types to detect and remediate vulnerabilities. They help identify areas lacking sufficient protection. The team tests the security of infrastructure and applications, conducts IT Health Checks, reviews IT configurations, identifies gaps that threat actors could exploit, and makes recommendations to safeguard assets. What you'll be doing … consultancy to internal and external stakeholders. Leading the delivery of PGI's infrastructure penetration testing. Collaborating on the design and delivery of new and existing service lines related to offensive security assessments. Supporting and often leading technical pre-sales, proposal writing, and client engagements. Coaching and supervising junior team members, including resource management, development planning, mentoring, and knowledge … transfer. Analyzing security data to identify patterns, threats, and vulnerabilities. Producing high-quality technical reports that explain vulnerabilities in non-technical language for stakeholders. Performing quality assurance and peer reviews of project reports. Collaborating with colleagues on internal or client projects. Contributing to technical training and development materials. Supporting technical delivery projects to ensure successful outcomes. Mentoring security 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 ❯

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 ❯

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 ❯

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 ❯

DDI/MFA Solution is desirable. Experience of working across a broad range of technologies, with good understanding of all aspects of IT (e.g. applications, data, network/infrastructure, security). Solid understanding of network technologies/solution from design to Implementation Job Title: Network Architect Location: London, UK Rate/Salary: 400.00 - 460.00 GBP Daily Job Type: Contract … to exercise your privacy rights, please visit the Contacting Us section of our Online Privacy Notice at for details on how to contact us. To protect your privacy and security, we may take steps to verify your identity, such as a password and user ID if there is an account associated with your request, or identifying information such as … United Kingdom 4 days ago London, England, United Kingdom 1 week ago London, England, United Kingdom 2 weeks ago London, England, United Kingdom 1 week ago Linux Cryptography and Security Engineer London, England, United Kingdom 1 week ago Offensive Security Engineer, Workvivo - UK London, England, United Kingdom 1 week ago Barnet, England, United Kingdom 1 day ago More ❯

Are you an offensive security specialist who is excited about delivering the best service possible? Keen to work in a business where you stand to work alongside some very talented testers? CND are working with a boutique Cyber Security consultancy who are focused on the Penetration Testing market. What makes them stand out? They are not interested … with common tooling for penetration testing. Ideally, a knowledge of Cloud services such as Azure or AWS. Capability to script or code in Bash, Python etc. Appreciation for Cyber Security standards such as ISO27001, PCI-DSS or CIS. This is a role with a growing, exciting organisation who can offer you a strong degree of progression and the ability More ❯

Role: Penetration Tester Type: Permanent Location: Cheltenham/Remote Clearance: SC/DV Are you an offensive security specialist who is excited about delivering the best service possible? Keen to work in a business where you stand to work alongside some very talented testers? CND are working with a boutique Cyber Security consultancy who are focused on … with common tooling for penetration testing • Ideally, a knowledge of Cloud services such as Azure or AWS • Capability to script or code in Bash, Python etc • Appreciation for Cyber Security standards such as ISO27001, PCI-DSS or CIS This is a role with a growing, exciting organisation who can offer you a strong degree of progression and the ability 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 … are not leading a project, you are a collaborative and effective software engineer and team member. You will interact with one of the world's most vibrant communities of security researchers and hackers and use this experience to build delightful features and products for them and the thousands of companies who trust HackerOne with their cybersecurity posture. As a More ❯

testers, review reports, and ensure technical accuracy. Deliver clear, comprehensive documentation and present findings to clients. Innovate and contribute to new tools, methodologies, and red team capabilities. Collaborate across security teams and maintain strong client relationships. Support project delivery and manage multiple testing engagements. Requirements: Extensive experience in penetration testing and ethical hacking. Certifications such as OSCP, CRT, CSTM … or equivalent. Must hold Check Team Member (CTM) status Proficiency with offensive security tools and techniques. Strong communication, leadership, and client-facing skills. Unfortunately this client is unable to offer sponsorship for this role. More ❯

Penetration Tester - Manchester Hybrid - £50,000 - £60,000 (DOE) FryerMiles are delighted to be partnered with a leading cyber security consultancy that work with a diverse range of clients on exciting projects and engagements who are looking to hire an experienced penetration tester. This is hybrid position that requires office presence twice a week in the clients Manchester office. … such as Nessus, Qualys, Kali etc.. Experience mentoring or assisting junior/graduate testers Eligibility to be SC Cleared This client do pen testing differently & are not your typical offensive security consultancy & there are many perks and bonuses that are on offer. If you think this position could be a good fit for you, then please apply directly More ❯

Penetration Tester - Manchester Hybrid - £50,000 - £60,000 (DOE) FryerMiles are delighted to be partnered with a leading cyber security consultancy that work with a diverse range of clients on exciting projects and engagements who are looking to hire an experienced penetration tester. This is hybrid position that requires office presence twice a week in the clients Manchester office. … such as Nessus, Qualys, Kali etc.. Experience mentoring or assisting junior/graduate testers Eligibility to be SC Cleared This client do pen testing differently & are not your typical offensive security consultancy & there are many perks and bonuses that are on offer. If you think this position could be a good fit for you, then please apply directly More ❯

and strategic advisory efforts. Additional responsibilities include authoring and reviewing high-visibility technical assessments, mentoring senior researchers, informing detection engineering across host- and network-based systems, identifying trends in offensive security tooling and tactics, and generating original research leads that inform Insikt Group's intelligence production. As a principal researcher, you will be expected to operate autonomously across … reverse engineering for Windows, macOS, or Linux Highly Desirable Skills/Experience (not required): BA/BS or MA/MS degree or equivalent experience in Computer Science, Information Security, Cybersecurity, or a related field 7+ years of experience in static and dynamic malware analysis 7+ years of experience in network analysis tools Programming experience in C, C++, or More ❯