Junior Penetration Tester Jobs In Sheffield Page 6 by Location

Head of OT & ICS Security Testing

Company IconLRQA
Location IconBirmingham

Overview In this role, you will lead LRQA’s OT and ICS security testing service line, guiding live-environment assessments and safety-first testing across energy, utilities, manufacturing, maritime and process sectors. You’ll build lab...Read More>>.

Posted: October 5th, 2026
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Penetration Tester - Grow in a Collaborative Security Team

Company IconUltima
Location IconReading

A leading technology provider in Reading is seeking a Penetration Tester to enhance its Security Testing Practice. The role involves delivering high-quality penetration testing engagements, supporting IT Health Checks, and collaborating with senior c...Read More>>.

Posted: June 6th, 2026
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Penetration Tester — Hybrid, UK Cyber Security Consultancy

Company Icon4Square Recruitment Ltd
Location IconManchester

A growing UK cyber security consultancy is seeking a skilled Penetration Tester to conduct security assessments across various technologies. Join a supportive team with opportunities for professional development and flexibility in a hybrid working en...Read More>>.

Posted: June 6th, 2026
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Senior Security Consultant (Hardware/Embedded Penetration Tester)

Company IconNetSPI
Location Icon

OverviewNetSPI is an award-winning pioneer of Penetration Testing as a Service (PTaaS) with its AI-powered platform supported by more than 350 in-house cybersecurity experts. Specializing in 50+ pentest types, attack surface visibility...Read More>>.

Posted: June 6th, 2026
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Senior Security Testing Consultant

Company IconAnson McCade
Location Icon

Deliver hands‑on security testing that protects critical systems. About the Role As a Senior Security Testing Consultant, you’ll deliver end‑to‑end security testing engagements across applications, web, mobile, and infra...Read More>>.

Posted: June 6th, 2026
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Senior Penetration Tester – Telecoms & Hardware Security

Company IconNational Physical Laboratory (NPL)
Location Icon

The National Physical Laboratory (NPL) is seeking a skilled Security Tester to join their team in Solihull. The role involves conducting security assessments, performing penetration testing, and investigating security findings. Ideal applicants wi...Read More>>.

Posted: June 6th, 2026
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Security Testing & Compliance Auditor

Company IconWipro
Location IconLondon

Wipro is seeking a Security Testing Coordinator in Greater London, specializing in information security governance, risk, and compliance. The ideal candidate will have a strong understanding of ISO 27001 and be experienced in security testing and aud...Read More>>.

Posted: June 6th, 2026
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Cyber Security Test Lead

Company IconPeregrine
Location Icon

Peregrine City Of Bristol, England, United KingdomCyber Security Test LeadAt Peregrine, we’re always seeking Specialist Talent that have the ideal mix of skills, experience, and attitude, to place with our vast array of clients....Read More>>.

Posted: June 6th, 2026
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Senior Penetration Tester — Web, Mobile & API Security

Company IconSynergy Solutions International Limited
Location IconLondon

A consultancy firm in London is looking for a Senior Penetration Tester to join their team. The role involves performing high-standard penetration tests, managing and mentoring security consultants, and producing timely reports. Ideal candidates will...Read More>>.

Posted: June 6th, 2026
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Penetration Tester (CREST/CHECK) – Shape Secure Futures

Company IconGoaco
Location Icon

A technology solutions provider in the United Kingdom seeks a skilled Penetration Tester to enhance cybersecurity for clients. You will conduct penetration tests, assess security vulnerabilities, and collaborate closely with the Global Cyber Security...Read More>>.

Posted: June 6th, 2026
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Associate Penetration Tester — Web/API Security & Reporting

Company IconRadley James
Location IconManchester

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-...Read More>>.

Posted: June 6th, 2026
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Penetration Tester — Hybrid London, Red Team Growth

Company IconSolutions & Innovations Company
Location IconLondon

A leading cybersecurity firm in London is seeking a passionate Penetration Tester to enhance their offensive security team. You will support cloud and infrastructure security assessments, write detailed reports for various stakeholders, and collabora...Read More>>.

Posted: June 6th, 2026
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Senior Penetration Tester — Lead Security Assessments

Company IconNational Physical Laboratory (NPL)
Location Icon

The National Physical Laboratory (NPL) seeks a Senior Security Testing Specialist to lead security assessments across complex systems. You will be responsible for conducting hands-on penetration testing and mentoring junior team members, all withi...Read More>>.

Posted: June 11th, 2026
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Security Testing Consultant

Company IconPursuu
Location IconLondon

About the job Security Testing Consultant Why Be A Testing Consultant Here? £50-65k per annum (negotiable increase) 22 Days Holiday Bank Holidays 3 Days Company Holiday In Between Christm...Read More>>.

Posted: June 23rd, 2026
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IT/OT Penetration Tester | Hybrid + Learning Budget

Company IconPA Consulting
Location IconLondon

A leading consulting firm in Greater London is looking for a penetration tester to deliver high-quality security assessments and collaborate with multiple teams. The ideal candidate will have relevant certifications and a strong knowledge background...Read More>>.

Posted: July 6th, 2026
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Senior Penetration Tester - FinTech Security Leader

Company IconStarling Bank Limited
Location IconLondon

Starling Bank Limited is seeking an experienced Penetration Tester to join our security team in a hybrid role. You will conduct tests across mobile, web, cloud, and infrastructure, partner with engineering to secure development, and help remediati...Read More>>.

Posted: July 22nd, 2026
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Senior Penetration Tester - Hybrid & Impactful Security

Company IconStarling
Location IconSouthampton

Starling Bank is seeking an experienced Penetration Tester to strengthen our cyber security team. You will conduct mobile, web, cloud and infrastructure tests, report findings, and help drive secure development across engineering functions....Read More>>.

Posted: July 27th, 2026
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Penetration Tester - Hands-On Security & Reporting Pro

Company IconGuideposts Trust Limited
Location IconCardiff

Guideposts Trust Limited is seeking a skilled Penetration Tester to join our expanding team in the United Kingdom. The role focuses on manual penetration testing across multiple disciplines, with reporting to a high standard and clear communicatio...Read More>>.

Posted: July 29th, 2026
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Graduate Cyber Security Consultant/Penetration Tester

Company IconBPM Tech
Location Icon

Penetration Tester – Bristol | Full-Time | Hybrid with Client Travel My client is a UK-based technology and cybersecurity consultancy delivering cutting‑edge solutions across sectors including telecoms, finance, defence, rail, and...Read More>>.

Posted: August 17th, 2026
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Lead Penetration Tester — FinTech Security & Automation

Company IconG-Research
Location IconLondon

G-Research is seeking a Penetration Tester to lead and conduct security assessments across internal systems. You will deliver actionable remediation insights and collaborate on remediation strategies, strengthening our security posture.The...Read More>>.

Posted: August 29th, 2026
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Senior Penetration Tester — Hybrid, Secure Systems & Innovation

Company IconStarling
Location IconLondon

Starling is recruiting an experienced Penetration Tester to join our security team in a hybrid role. You will work with cyber security professionals to ensure services are designed, developed, and operated securely, conducting testing and driving...Read More>>.

Posted: September 2nd, 2026
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Security Consultant - Red Team & Penetration Testing Lead

Company IconHamilton Barnes Associates Limited
Location Icon

Hamilton Barnes Associates Limited is seeking a security testing expert to lead client engagements across the UK. You will conduct network, web, and mobile assessments, perform social engineering, and participate in red team engagements to deliver...Read More>>.

Posted: September 9th, 2026
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Senior Penetration Tester - Elite Security Engineer

Company IconFSP
Location IconLondon

FSP is a leading consultancy specialising in Digital, Security and AI solutions. We are seeking a Senior Penetration Tester to join our Cyber Security practice in the United Kingdom.You will support teams on high-impact security projects, a...Read More>>.

Posted: September 20th, 2026
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Senior Penetration Tester - Hybrid, High-Impact Security

Company IconFSP
Location Icon

FSP is seeking a Senior Penetration Tester to join our Cyber Security practice. You will contribute to high-impact technical projects, providing expert guidance on network, platform, and application security while developing tools for adversarial...Read More>>.

Posted: September 21st, 2026
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Contract Penetration Tester - Web Apps & API Security

Company IconAnthony James Consulting
Location IconFalmer

Anthony James Consulting is seeking an experienced penetration tester or security testing firm to conduct an independent assessment of a Laravel/PHP web application with a substantial API component, based in the Brighton area.The engagement...Read More>>.

Posted: September 22nd, 2026
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Penetration Tester (Associate) – AI & Infra Security

Company IconSky Ireland Limited
Location IconLondon

Sky Ireland Limited is seeking a Cyber Security specialist to conduct penetration tests on applications and infrastructure, while leveraging AI-assisted tools to enhance research and reporting. You will document findings, scope engagements, and co...Read More>>.

Posted: September 24th, 2026
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SC-Cleared Security Researcher & Penetration Tester

Company IconUK Telecoms Lab (UKTL)
Location Icon

UK Telecoms Lab (UKTL) is seeking an experienced security tester to conduct comprehensive assessments in our dedicated lab, performing penetration testing across hardware, software and telecoms systems. You will develop scripts to automate testing...Read More>>.

Posted: September 24th, 2026
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Penetration Tester & Red Team Specialist

Company IconClaranet
Location IconLondon

Claranet is seeking a Penetration Tester to lead and execute web and mobile application and infrastructure testing engagements. You will collaborate with clients to deliver bespoke consultancy, contribute to whitepapers and advisories, and develop...Read More>>.

Posted: September 25th, 2026
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IT/OT Penetration Tester — Hybrid & Client-Facing Security

Company IconAnson McCade
Location IconLondon

Anson McCade is seeking an experienced IT/OT Penetration Tester to join a growing cybersecurity consulting team. You will perform high-quality penetration tests and security assessments across defence, energy, utilities, manufacturing, transport a...Read More>>.

Posted: September 25th, 2026
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Principal Penetration Tester — Hybrid, AWS & Purple Team

Company IconAddition
Location IconWatford

Addition is working with a large, highly regulated organisation on digital transformation and seeks a Principal Penetration Tester in Watford. Hybrid working, competitive salary with bonus and benefits.You will lead testing across web apps,...Read More>>.

Posted: September 25th, 2026
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Penetration Tester & Offensive Security Consultant | DV Eligible

Company IconLorien
Location IconLondon

Lorien in London is seeking an experienced Penetration Tester/Offensive Security Consultant for a long-term on-site contract. You will conduct penetration testing across infrastructure, cloud and web applications, simulating real-world attacks to...Read More>>.

Posted: September 25th, 2026
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Senior AI-Driven Penetration Tester

Company IconEames Consulting Group
Location IconLondon

Eames Consulting Group is seeking a Senior Penetration Tester for a contract role in the UK, focused on AI-enabled vulnerability research and risk-based remediation across priority applications. You will lead end-to-end testing, combining manual t...Read More>>.

Posted: September 27th, 2026
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Penetration Tester, TVM & Security Assurance

Company IconThames Water Utilities Limited
Location IconReading

Thames Water is seeking a Security Penetration Tester to support the design, implementation and maintenance of TVM solutions across the IT estate. You will collaborate with Digital teams to mitigate vulnerabilities and ensure remediation is aligne...Read More>>.

Posted: September 27th, 2026
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Associate Penetration Tester - Cyber Security

Company Iconsky
Location IconHounslow

Sky Cyber Security teams in the UK tackle evolving threats and deliver secure digital experiences for millions. This graduate role focuses on hands-on penetration testing, learning modern security testing methods, and collaborating with cross-func...Read More>>.

Posted: September 27th, 2026
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Lead Penetration Tester: Web, Network & Mobile Security

Company IconBarclays Bank Plc
Location IconManchester

Barclays Bank Plc is seeking a Penetration Tester to identify vulnerabilities across web, network, mobile, and client applications, turning findings into actionable remediation steps. The role sits within a collaborative security testing team and...Read More>>.

Posted: September 30th, 2026
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Security Testing Lead

Company IconIdentifi Global Resources Ltd
Location IconMilton Keynes

Salary: £70,000 - 70,000 per year Requirements: Strong cyber security experience within testing, security engineering, application security or vulnerability management. Experience managing or coordinating...Read More>>.

Posted: October 1st, 2026
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Examination Invigilator: Upholding Fair, Secure Tests

Company IconSRUC
Location IconBroxburn

SRUC is seeking an Invigilator to join the Timetabling and Exams Administration team on a permanent casual contract. The role focuses on creating a professional, welcoming examination environment and ensuring integrity and compliance during assess...Read More>>.

Posted: October 4th, 2026
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