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Penetration Tester (CHECK) - UK remote - £50,000 - £90,000 + Benefits + Bonus Opus has partnered with a rapidly expanding UK cyber security consultancy to recruit experienced CHECK Penetration Testers. This organisation delivers high impact security testing across government, defence, and critical national infrastructure, and is looking to grow their team with professionals who hold active SC clearance and current CHECK status (CTM or CTL). Our client offer a variety of role responsibilities, in addition to CHECK Testing, you'll be able to work on red team engagements & non-CHECK testing engagements. Role Responsibilities • Deliver CHECK‑approved penetration testing across infrastructure, applications, cloud, and bespoke systems., • Conduct vulnerability assessments, exploitation, and technical security reviews in line with NCSC standards., • Produce clear, actionable reports and present findings to both technical and non‑technical stakeholders., • Support scoping and planning of engagements, including complex or multi‑phase assessments., • Contribute to internal tooling, methodology development, and knowledge sharing., • Stay current with emerging threats, vulnerabilities, and offensive security techniques. Mandatory Requirements • Active SC clearance., • Active CHECK status: CTM or CTL., • Strong experience delivering penetration testing across multiple domains., • Ability to communicate and consult with clients and key stakeholders and a technical and non technical level. What the Consultancy Offers • Competitive salary and performance based incentives., • Clear progression pathways, including training budgets for advanced certifications and CHECK level development., • Opportunities to influence tooling, methodology, and service offerings as the consultancy scales., • A culture that values technical excellence, curiosity, and continuous learning.

The Opportunity ProCheckUp, an elite independent cybersecurity consultancy serving FTSE 100 corporations, UK government authorities, and international financial institutions, is seeking an experienced Penetration Tester with SC Clearance to join our expanding remote team. This is an exceptional opportunity to conduct high-impact security assessments across diverse enterprise environments while maintaining work-life balance through flexible remote working. You'll contribute to ProCheckUp's ambitious expansion phase, working alongside industry-leading security professionals on mission-critical infrastructure, applications, and network security testing for the UK's most security-conscious organizations. What You'll Do Core Responsibilities: • Conduct advanced penetration testing across network infrastructure, web applications, and mobile platforms for enterprise clients, • Perform vulnerability assessments, threat modelling, and risk analysis across diverse technical environments, • Execute social engineering assessments and physical security testing, • Produce detailed scoping documents and executive-level penetration testing reports aligned with CREST and NCSC standards, • Lead incident response investigations and digital forensic analysis when required, • Work independently on client-facing assessments whilst collaborating with senior consultants and team leaders, • SCADA/OT environment security testing, • Cloud infrastructure penetration testing (AWS, Azure), • Web services and API security, • Mobile application testing (iOS/Android) Who You Are Essential Experience & Skills: • Minimum 3+ years professional penetration testing experience, • Demonstrable expertise in network, application, and infrastructure security testing, • Strong hands-on proficiency with penetration testing frameworks, exploitation techniques, and security tools (Metasploit, Burp Suite, Wireshark, custom tools), • Deep technical knowledge of Windows, Linux, Unix operating systems and TCP/IP networking protocols, • Proven ability to perform source code reviews and application security analysis, • Advanced understanding of web application vulnerabilities (OWASP Top 10) and mitigation strategies, • Excellent report writing and executive communication skills—ability to translate technical findings into business risk, • Ability to work autonomously and adapt to client-specific environments, • CREST/CyberScheme CCTM/CSTM CCT/CSTL-INF or CCT/CSTL-APP (current), • NCSC CHECK Team Leader (CTL) (current) or CHECK Team Member (CTM) (current) preferred but not essential, • CEH Advanced (AECH) or OSCP, • SANS GCIH, GPEN, or GWAPT, • EnCase Certified Examiner (EnCE), • CWSP (Certified Wireless Security Professional), • Published security research, CVE disclosures, or white papers, • Curiosity and passion for emerging security threats and attack methodologies, • Drive to mentor junior consultants and contribute to technical innovation, • Professional demeanour with excellent client-facing communication, • Attention to detail in all deliverables, particularly technical reports and evidence documentation Why ProCheckUp? ✓ Proven Track Record: 25+ years delivering security services to world-leading organisations; holders of NCSC CHECK, CREST, PCI QSA, and PCI ASV accreditation's ✓ Prestigious Client Base: Work directly with FTSE 100 companies, UK government bodies, international law firms, and critical infrastructure operators ✓ Technical Leadership: Collaborate with industry experts who publish research, present at major conferences, and drive the cybersecurity industry forward ✓ Flexibility & Autonomy: Remote-first working with complete location flexibility across the UK—work from home, co-working spaces, or client sites as you prefer ✓ Career Progression: Clear advancement pathway from Consultant → Senior Consultant → Team Leader → Technical Director; investment in advanced certifications and professional development ✓ Competitive Remuneration: Market-leading salary package (£65,000–£85,000+ depending on experience and certifications) plus comprehensive benefits ✓ Backing of a Stable, Well-Funded Firm: Work for an independent, profitable, growth-focused security consultancy—not a commodity testing mill ✓ Continuous Learning: Access to research funding, certification sponsorship, conference attendance, and exposure to cutting-edge threat landscapes The Application Process This is a carefully selected search—we're looking for genuine penetration testing professionals with the technical depth to advise enterprise clients, not script-runner-test shops. To Apply: • Submit your CV (including certifications, security clearance status, and estimated clearance renewal date), • Write a brief covering letter (150–250 words) addressing:, • Why ProCheckUp's mission and client base appeal to you, • Your remote working setup and availability (notice period, start date), • Screening call with HR (15 mins): Verify background, clearance status, and role fit, • Technical interview with Senior Consultant (45 mins): Deep-dive on penetration testing methodology, recent case studies, and security trends, • Final interview with Hiring Manager/Technical Director (30 mins): Culture fit, growth ambition, and team dynamics Logistics | Position Type | Full-Time, Permanent | | Location | Remote, United Kingdom | | Security Clearance | SC (Minimum) | | Working Arrangements | Flexible remote; occasional travel for client engagements | | Salary | £65,000–£95,000+ based on experience, certifications, and client-facing impact | | Benefits Package | Competitive pension, health insurance, professional development budget, | | Notice Period | 2-8 weeks preferred; negotiable for exceptional candidates | About ProCheckUp Founded in 1999, ProCheckUp has evolved from a specialist penetration testing firm into a multi-disciplinary cybersecurity consultancy trusted by the world's most security-conscious organizations. Our team of CHECK Team Leaders, CREST Certified Testers, and forensic specialists delivers: • Penetration Testing & Security Audits: Infrastructure, application, and mobile assessments, • Compliance Advisory: PCI DSS, GDPR, ISO27001 implementations and certifications, • Incident Response & Forensics: 24/7 emergency response and digital evidence analysis Equal Opportunities ProCheckUp is an equal opportunities employer. We celebrate diversity and are committed to building an inclusive environment for all employees, regardless of gender, race, ethnicity, religion, disability, age, sexual orientation, or gender identity. We encourage applications from underrepresented groups in cybersecurity. Security Vetting: All successful candidates will be subject to UK security vetting procedures. Applicants must have resided in the UK for the last 5+ years to be eligible for SC clearance (or provide documented reasons for absence). Previous security clearance experience is valued but not essential. *

Penetr Tester – Cyber Security Consultancy.We’re looking for a skilled Penetration Tester to join a growing, highly regarded UK cyber security practice.You’ll be part of an established, CREST-accredited team, working with both public and private sector clients to assess and improve their secur

A leading cybersecurity firm in Manchester is seeking an Associate Penetration Tester to identify and remediate security vulnerabilities across applications and infrastructure. You will conduct penetration tests, document findings, and support cross-functional teams. Ideal candidates have practical

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About the opportunity Are you ready to launch a career in cyber security? Netcom Training’s fully-funded Cyber Security course (NCFE Certificate in Cyber Security Practices, Level 3) equips you with the practical skills employers in Greater Manchester are actively seeking. From threat intelligence and security testing to incident response and ethical compliance, you’ll gain hands-on experience that prepares you for today’s fast-growing cyber security and IT roles. Our learners have gone on to roles such as Cyber Security Analyst, Junior Penetration Tester, SOC Analyst, and IT Support, working with companies across tech, logistics, public services, and digital sectors. Complete the course and gain a guaranteed career support. helping you start your career protecting businesses, data, and digital systems. Course Details * Start Date: 30/03 * Duration: 14 weeks * Format: Online, practical workshops * Schedule: Mon-Thurs 6-9PM What you’ll learn * Cyber Principles: Understand core frameworks and security principles. * Threat Intelligence: Develop expertise to identify risks and analyze threats. * Vulnerability Testing: Conduct cyber security testing, identify vulnerabilities, and implement controls. * Incident Response: Prepare for and respond to live cyber security incidents. * Ethics & Law: Understand legislation and ethical conduct within the cyber security sector. * Professional Skills: Build the behaviours required for the modern cyber security workplace. Career Pathway Successful participants are guaranteed an interview with us or our network of UK-wide partners working with leading brands. * Potential Roles: Trainee Cyber Security Analyst, SOC Analyst, Junior Information Security Officer. * Starting Salaries: Typically £22,000 – £35,000 (role dependent). Eligibility This is a government-funded opportunity. To apply, you must: * Live in Greater Manchester. * Be aged 19 or over. * Earn below the gross annual wage cap of £32,400. * Not currently be undertaking other government-funded training. * Right to Work: You must have lived in the UK/EU for the last 3 years and have the right to work in the UK (Student/Graduate visas are not eligible). Cost This is a fully-funded course with no fees – complete the training, gain essential cyber security skills

Penetration Tester / Cyber Security Consultant | £45-50k | Active SC NeededWe're working with a growing UK cyber security consultancy delivering penetration testing services to government and public sector organisations. They're looking for a Cyber Security Consultant / Penetration Tester to join t

This team is led by an active penetration tester who understands the niggles of day penetration testing operations. Despite being a CHECK penetration testing provider, the business is increasingly focused on commercial engagements in areas we know are proving popular amongst testers. If you thrive o

This role suits penetration testers who want to operate in a consulting environment, working across multiple clients and gaining exposure to complex, large-scale systems. They are now hiring a Penetration Tester into their Offensive Security team. This is a hands-on role focused on delivering penetr

Penetration Tester (CHECK Team Member). Penetration Tester (CHECK Team Member). Deliver high-quality penetration tests and vulnerability assessments.

As an experienced Penetration Tester you will be working with talented cyber security professionals to protect Starling customers, company assets and systems using the latest technologies and techniques. First stage with the Penetration Testing Team Lead. Second stage with additional members of the

A leading cybersecurity firm in the UK is seeking an experienced Cybersecurity Penetration Tester to conduct advanced penetration testing and vulnerability assessments.

A leading cybersecurity consultancy in the UK is seeking a Senior Penetration Tester to join their skilled team. The ideal candidate will have over 4 years of hands-on penetration testing experience with a desire to gain further qualifications.

We are seeking an experienced Senior Hardware/Embedded Penetration Tester to assess the security of hardware and embedded systems and provide actionable recommendations. NetSPI is an award-winning pioneer of Penetration Testing as a Service (PTaaS) with its AI-powered platform supported by more than

A leading cybersecurity firm in Greater London is seeking a skilled individual for a penetration testing role.

We are looking for an experienced Penetration Tester who can bridge the gap between deep technical exploitation and real-world business risk. Additionally, we understand the importance of knowledge and expertise remaining current and you shall support the continued advancement of our penetration tes

Get notified about new Penetration Tester jobs in. A growing specialist consultancy is seeking a Penetration Tester to join its team delivering a range of cyber security and digital services to clients across multiple sectors. Conduct comprehensive penetration testing on infrastructure, web apps, AP

As a result of growth, we are looking for an experienced Penetration Tester with solid experience of infrastructure and web application testing to deliver testing engagements on a range of key client work. This is an excellent opportunity for a highly motivated and determined Penetration Tester to c

Penetration Tester / Cyber Security Consultant | £45-50k | Active SC Needed. Cyber Security Consultant / Penetration Tester. We’re working with a growing UK cyber security consultancy delivering penetration testing services to government and public sector organisations.

A consultancy firm is seeking a Penetration Tester to support a cyber security programme for a financial services client.

A leading cybersecurity consultancy in the UK is seeking a skilled Senior Penetration Tester to join their Cyber Security practice. Candidates should have at least 2 years of experience in penetration testing, strong programming skills, and a commitment to quality and teamwork. The role involves lea

We are looking for an experienced Penetration Tester who can bridge the gap between deep technical exploitation and real-world business risk. Additionally, we understand the importance of knowledge and expertise remaining current and you shall support the continued advancement of our penetration tes

A leading cybersecurity company in the United Kingdom is seeking an experienced Cloud Penetration Tester to lead cloud security assessments and collaborate with clients on security strategies. The ideal candidate should have 3 to 5 years of experience in penetration testing, especially with GCP, and

The team is hiring a Penetration Tester to perform security assessments, identify vulnerabilities, and provide actionable recommendations to enhance defence strategies. Mentor and support junior penetration testers, ensuring consistent delivery quality and professional growth. At least 2 years’ ex

A leading Information Security Consultancy in the United Kingdom is seeking a Senior Penetration Tester to deliver professional penetration testing engagements.

Experience in working in penetration testing teams contributing to the delivery of penetration testing services. Current penetration testing qualification, such as, CREST Practitioner Security Analyst, Crest Registered Tester or Cyber Scheme Team Member. Are you a passionate Penetration Tester who l

Capital One Offensive Security reduces cyber risk by uncovering vulnerabilities and weaknesses in the enterprise cyber environment through coordinated ethical hacking and penetration testing scenarios. Perform penetration testing of APIs, web applications, networks, and cloud services, as well as re

A cybersecurity services provider is seeking a Penetration Tester to conduct security assessments across various clients. You'll help build a Penetration Testing team and contribute to the growth of the business.

Develop and share knowledge with the rest of the penetration testing team. Have developed their SME knowledge in one or more fields of penetration testing, such as mobile application testing, Cloud, Operational Technology, or a specific industry/environment such as telecoms, defence, or maritime.

Get notified about new Penetration Tester jobs in. Deliver external penetration testing services — from scoping and testing to risk analysis and reporting. Practical experience in penetration testing across networks, applications, and cloud environments.

A leading cybersecurity firm in London is seeking a passionate Penetration Tester to enhance their offensive security team.

A leading cybersecurity firm in Greater London seeks an experienced Penetration Tester to deliver high-quality security assessments on various projects. The ideal candidate will have a strong background in client-facing roles, proficiency in conducting various penetration tests, and necessary certif

As a Penetration Tester (SaaS and IoT) at Camlin, you will be a key person in the defence of our IoT and SaaS ecosystem. Penetration Tester, AppSec Engineer, or Security-focused Developer). Web & API Penetration Testing:.

Penetration Tester, Ethical Hacker, Red Team, CREST Tester, CHECK Tester, Cyber Security Testing, Outside IR35 Contract. We’re looking for a Penetration Tester for our consultancy client supporting a cyber security programme for a financial services organisation. Conducting infrastructure, network

A major financial corporation is seeking a Penetration Tester to perform comprehensive security assessments on applications and networks. You will be responsible for executing penetration tests and providing actionable recommendations to management.

A leading cybersecurity firm in the United Kingdom is seeking an experienced Cloud Penetration Tester to execute assessments against AWS environments. The ideal candidate will have 3-5 years of experience in offensive penetration testing and recognized qualifications.

Our client, a leading UK-based MSSP, is looking for a Senior Penetration Testing Consultant to join their Red Team. This is a remote-first role with occasional on-site work, ideal for an experienced tester who wants to take on complex assessments, lead engagements, and contribute to a high-performin

A trusted digital solutions provider is hiring a Penetration Tester to carry out security assessments and identify vulnerabilities. Responsibilities include leading penetration tests, mentoring junior testers, and producing detailed reports. Must hold CHECK Team Leader certification and have strong

Sign in to set job alerts for “Penetration Tester” roles. Penetration Tester – UK Remote Linux / Windows Python, PowerShell, Bash. Are you passionate about ethical hacking and ready to take your skills to the next level? We're hiring a Penetration Tester to join a growing cyber team delivering

A leading cybersecurity firm is seeking an experienced Penetration Tester based in Greater London. The role requires strong client-facing experience, relevant certifications (CREST or NCSC), and proficiency in various penetration testing techniques.

Sign in to set job alerts for “Penetration Tester” roles. They are now looking for a graduate Penetration Tester to join their growing team!.

As a Penetration Tester, you will perform formal and comprehensive penetration testing assessments, including producing full written reports to appropriate standards and within agreed deadlines. Coach and mentor Graduate and Junior penetration testers where appropriate;. Proven industry experience i

Minimum of r+ years in a penetration testing role. Excellent knowledge of vulnerability and penetration testing concepts and best practices, including ethical hacking requirements. Deep understanding of the differences between vulnerability assessments and penetration tests regarding scope, objectiv

I am working with a well-established Cyber Security Consulting and Insurance firm who are looking for a Penetration Tester to join their team. Experience conducting Web app and Infrastructure Penetration tests, with experience or exposure to Wi-Fi and Red teaming. They have a very close-knit team wh

Security Penetration Tester / Red Team Lead - AI.

A leading cybersecurity firm in London seeks a Security Penetration Tester / Red Team Lead specializing in AI security.