Junior Penetration Tester Jobs In Sheffield Page 6 by Location

IT/OT Penetration Tester

Company IconPA Consulting
Location IconLondon

Overview In this role you help clients strengthen security through hands-on testing and clear reporting. You join PA’s Digital & Data community to deliver agile, client‑facing security work and contribute to knowledge sharing within a c...Read More>>.

Posted: October 1st, 2026
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Cyber Security Consultant (Penetration Tester)

Company IconMoore Kingston Smith
Location IconLondon

Overview In this role you will lead and execute hands-on penetration testing across web apps, APIs, and network infrastructures within a collaborative risk advisory team. You’ll deliver Cyber Essentials Plus assessments and broader securi...Read More>>.

Posted: October 1st, 2026
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Senior Penetration Tester

Company IconStarling Bank
Location IconLondon

Overview In this role you will work with our cyber security team to protect Starling’s customers and assets by conducting comprehensive penetration testing across mobile, web, cloud, and infrastructure. You will collaborate with engineeri...Read More>>.

Posted: October 1st, 2026
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Senior Penetration Tester

Company IconTieTalent
Location IconLondon

OverviewJoin to apply for the Senior Penetration Tester role at TieTalentLife on the teamComputacenter is growing our penetration testing capability and we are looking for an experienced penetration tester to...Read More>>.

Posted: June 6th, 2026
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Penetration Tester

Company Icon4Square Recruitment Ltd
Location IconManchester

Penetr Tester – Cyber Security Consultancy About the Role 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 tea...Read More>>.

Posted: June 6th, 2026
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Senior Hardware & Embedded Penetration Tester

Company IconNetSPI
Location Icon

A cybersecurity firm is seeking an experienced Senior Hardware/Embedded Penetration Tester to assess the security of hardware and embedded systems. This role requires strong skills in hardware penetration testing, reverse engineering, and collaborati...Read More>>.

Posted: June 6th, 2026
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Penetration Tester

Company IconPlatform Recruitment
Location IconLondon

My Client is a cybersecurity company who offer security services to multiple businesses across varying industries. They are now looking for a graduate Penetration Tester to join their growing team!Main Duties:...Read More>>.

Posted: June 6th, 2026
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Graduate Penetration Tester — Cybersecurity Analyst

Company IconPlatform Recruitment
Location IconLondon

An innovative cybersecurity firm is seeking a passionate graduate Penetration Tester to join their dynamic team. In this entry-level role, you will conduct vulnerability assessments and simulate cyberattacks to identify weaknesses in various systems....Read More>>.

Posted: June 6th, 2026
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Penetration Tester

Company IconComputer Network Defence Ltd (CND)
Location IconCheltenham

Get AI-powered advice on this job and more exclusive features.Direct message the job poster from Computer Network Defence Ltd (CND)Cyber Security Recruitment Manager at Computer Network Defence Ltd (CND) | BTL1 | Net+...Read More>>.

Posted: June 6th, 2026
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Penetration Tester

Company IconUltima
Location IconReading

Global Talent Acquisition Manager at Ultima Business Solutions - Driving Digital Transformation with the use of Artificial Intelligence and Automation Are you an ambitious cybersecurity professional with a passion for uncovering vulner...Read More>>.

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

Company IconCognizant
Location Icon

A leading IT services company is seeking a Security / Penetration Testing Engineer in London. The role includes gathering security requirements, conducting API and UI/Web application penetration testing, and ensuring compliance with industry standard...Read More>>.

Posted: June 6th, 2026
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Penetration Tester

Company IconiFindTech Ltd
Location IconLondon

Direct message the job poster from iFindTech LtdWork Across Internal Security, Compliance & Client EngagementsA fast-growing security-focused business is looking for a Penetration Tester to join their expanding team....Read More>>.

Posted: June 6th, 2026
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Security Penetration Tester

Company IconWipro
Location IconLondon

Security Testing Coordinators Security testing professionals, including penetration testers and security analysts, are responsible for identifying, analyzing, and mitigating vulnerabilities in software, systems, and networks. Key respo...Read More>>.

Posted: June 6th, 2026
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Penetration Tester: Offensive Security Engineer

Company IconTesco
Location IconWelwyn Garden City

A leading retail company in the UK is seeking a Cyber Security Specialist to enhance its penetration testing capabilities. In this role, you will perform security assessments on applications and infrastructure, utilizing internal knowledge to address...Read More>>.

Posted: June 6th, 2026
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Penetration tester - CHECK TEAM MEMBER

Company IconInfoSec People Ltd
Location Icon

OverviewOur 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...Read More>>.

Posted: June 6th, 2026
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Junior Associate Penetration Tester

Company IconRadley James
Location IconManchester

This range is provided by Radley James. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range We’re looking for an Associate Penetration Tester to help id...Read More>>.

Posted: June 6th, 2026
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Penetration Tester (OSCP Certified)

Company IconSolutions & Innovations Company
Location IconLondon

Your talent is the key to innovation. At S&l, we're not just offering jobs - we're building careers that make an impact. Apply now and be part of a team shaping the future of cybersecurity and technology.Salary: Up to £45,000 per annum....Read More>>.

Posted: June 6th, 2026
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Senior Penetration Tester

Company IconStarling Bank Limited
Location IconLondon

Starling is the UK’s first and leading digital bank on a mission to fix banking! We built a new kind of bank because we knew technology had the power to help people save, spend and manage their money in a new and transformative way. Read more...Read More>>.

Posted: July 22nd, 2026
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Cyber Security Consultant (Penetration Tester)

Company IconMoore Kingston Smith LLP
Location IconLondon

Cyber Security Consultant (Penetration Tester) Department: Cyber Employment Type: Permanent - Full Time Location: City, London Compensation: £45,000 - £55,000 / year Descriptio...Read More>>.

Posted: July 24th, 2026
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Penetration Tester

Company IconBarlowe LLP
Location IconLondon

We tackle the most complex problems in quantitative finance, by bringing scientific clarity to financial complexity. From our London HQ, we unite world‑class researchers and engineers in an environment that values deep exploration and methodi...Read More>>.

Posted: July 25th, 2026
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Lead Penetration Tester - Kubernetes & DevSecOps

Company IconBarlowe LLP
Location IconLondon

G-Research is seeking a hands-on Penetration Tester to lead tests and vulnerability assessments across internal systems and security controls. Your work will strengthen our security posture through continuous testing and remediation collaboration....Read More>>.

Posted: July 25th, 2026
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Senior Penetration Tester - Hybrid & Impactful

Company IconStarling
Location IconCardiff

Starling is seeking an experienced Penetration Tester to join our fast-moving cyber security team. You will perform mobile, web, cloud and infrastructure testing to validate controls and improve overall security posture.You will collaborate...Read More>>.

Posted: July 26th, 2026
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Penetration Tester - Offensive Security Consultant

Company IconWorkNest Secure
Location Icon

WorkNest Secure is seeking Offensive Security Consultants (Penetration Testers) to join our growing Cyber Security team in the United Kingdom. You will perform CHECK-accredited penetration tests across multiple environments and deliver actionable...Read More>>.

Posted: July 28th, 2026
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Penetration Tester - Systems Integrator

Company IconHamilton Barnes Associates Limited
Location IconSouth Yorkshire

Ready to identify vulnerabilities before attackers do?Join a cybersecurity services provider recognised for delivering penetration testing, advisory, and compliance solutions to enterprises. With a reputation for technical expertise and...Read More>>.

Posted: August 7th, 2026
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Senior Penetration Tester

Company IconStarling
Location IconLondon

Starling is the UK's first and leading digital bank on a mission to fix banking! We built a new kind of bank because we knew technology had the power to help people save, spend and manage their money in a new and transformative way. Read more a...Read More>>.

Posted: September 2nd, 2026
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Senior Penetration Tester

Company IconAVEVA
Location Icon

AVEVA is creating software trusted by over 90% of leading industrial companies.Position: R&D Senior Member of Technical Staff - Product Security - Penetration TestingQualifications: Experience executing penetration tests independe...Read More>>.

Posted: September 3rd, 2026
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Senior Penetration Tester - Hybrid FinTech Security Expert

Company IconStarling
Location IconManchester

Starling is the UK's first and leading digital bank on a mission to fix banking! We built a new kind of bank because we knew technology had the power to help people save, spend and manage their money in a new and transformative way. Read more abou...Read More>>.

Posted: September 5th, 2026
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Senior Penetration Tester

Company IconFSP
Location IconLondon

We have an exciting opportunity for a Senior Penetration Tester to join our thriving Cyber Security practice. We are seeking a skilled individual, with expertise in penetration testing or vulnerability research, who can contribute to the develo...Read More>>.

Posted: September 20th, 2026
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Penetration Tester - CTM

Company IconOscar
Location Icon

We’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 the...Read More>>.

Posted: September 20th, 2026
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Penetration Tester

Company IconAnthony James Consulting
Location IconFalmer

Contract Penetration Tester - Web ApplicationLocation: Brighton/UK-basedEngagement: ContractIndependent testers and specialist security firms welcomeWe're looking for an e...Read More>>.

Posted: September 21st, 2026
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Penetration Tester

Company IconLorien
Location IconLondon

PENETRATION TESTER/OFFENSIVE SECURITY CONSULTANT | DV ELIGIBLE | LONDON | 5 days a week on-site Looking for your next penetration testing contract? We're seeking experienced Penetration Testers/Offensive Security Consult...Read More>>.

Posted: September 24th, 2026
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Penetration Tester

Company IconAnson McCade
Location IconLondon

We’re looking for an experienced IT/OT Penetration Tester to join a growing cybersecurity consulting team, working on complex security assessments across a range of industries including defence, energy, utilities, manufacturing, tra...Read More>>.

Posted: September 24th, 2026
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Principal Penetration Tester

Company IconAddition
Location IconWatford

We’re working with a large, highly regulated organisation undergoing significant digital transformation. They’re looking for a Principal Penetration Tester to strengthen their internal security testing capability, combining deep application...Read More>>.

Posted: September 24th, 2026
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Ethical Hacker / Penetration Tester

Company IconNEWTO TRAINING LIMITED
Location IconCardiff

Salary: £65,000 - 65,000 per yearRequirementsLittle or no previous experience in cyber securityA willingness to learnGood communication skillsA genuine interest in changing career...Read More>>.

Posted: September 25th, 2026
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Penetration Tester

Company IconClaranet
Location IconLondon

As a Penetration Tester at Claranet, you will able to deliver you own web application tests and through training and partnering, you will be involved in a full range of testing work from mobile app and infrastructure testing to social engineeri...Read More>>.

Posted: September 25th, 2026
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Security Penetration Tester

Company IconThames Water Utilities Limited
Location IconReading

As a Security Penetration Tester, you will be responsible for supporting the design, implementation, and maintenance of TVM (Threat & Vulnerability Management) solutions, controls and processes across the organisation. You will be liaising with...Read More>>.

Posted: September 27th, 2026
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Penetration Tester - London or Belfast

Company IconHarrington Starr
Location IconNorthern Ireland

Harrington Starr have partnered with a global multi billion pound business in Belfast as they seek a Vulnerability and Penetration Testing Engineer to join their Belfast Centre team in providing security architecture, vulnerability and risk assess...Read More>>.

Posted: October 1st, 2026
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Senior Penetration Tester — Lead & Mentor Security

Company IconRMT Accountants & Business Advisors Ltd
Location Icon

Sumer Group, via its RMT Operations - IT, seeks an experienced Lead Penetration Tester to join its Cyber Security practice on client-site engagements. You will lead penetration tests, Cyber Essentials assessments, and security reviews for diverse...Read More>>.

Posted: October 2nd, 2026
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Senior Penetration Tester

Company IconRMT Accountants & Business Advisors Ltd
Location Icon

DescriptionIn 2023, RMT became part of Sumer Group - a collaboration of renowned regional accountancy practices with a shared vision to champion local small to medium-sized enterprises.Department: Operations - ITLo...Read More>>.

Posted: October 2nd, 2026
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Penetration Tester: Elevate Security Across Apps & Cloud

Company IconBytes Software Services
Location IconLeatherhead

Bytes Software Services is seeking a penetration tester to deliver high-quality testing across infrastructure, web apps, APIs and cloud environments. You will provide actionable security recommendations and work with sales and account teams to sco...Read More>>.

Posted: October 2nd, 2026
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Calm Exam Invigilator - Ensure Fair, Secure Testing

Company IconAvanti Schools Trust
Location IconBishop's Stortford

Avanti Grange Secondary School is seeking Exam Invigilators to ensure examinations are conducted smoothly, fairly and in accordance with regulations. You will help create a calm, well-organised environment where every candidate can demonstrate the...Read More>>.

Posted: October 9th, 2026
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