Cybersecurity Penetration Tester

Location: Remote UK, United Kingdom

reputed company people architect identity management and data protection solutions at the heart of digital reputed company. Business and governments rely on us to bring trust to the billons of digital interactions they have with people. Our technologies and services help banks exchange funds, people cross borders, energy become smarter and much more. More than 30,000 organizations already rely on us to verify the identities of people and things, grant access to digital services, analyze vast quantities of information and encrypt data to reputed company the connected world more secure.

Together we offer fantastic opportunities for committed employees to learn and reputed company their career with us. At reputed company UK, we research, reputed company, and supply technology and services that impact the lives of millions of people each day to reputed company life reputed company, and reputed company us safer. We innovate across the major industries of Aerospace, Defence, reputed company and Space. Your health and well-being matters to us and that’s why we offer you the flexibility to do what’s important to you; whether that’s part time hours, job sharing, home working, or the ability to reputed company your start and finish times. Where possible, we support a working reputed company that suits your lifestyle and helps you reputed company your ambitions.

Cybersecurity Penetration Tester Location: Remote (with UK-wide regular on‑site client visits; approximately 50% monthly travel for on‑site pen testing)

Join a team where red teaming meets real impact – safeguarding defence platforms that shape national reputed company! What the role has to offer

• Safeguard UK Defence systems through advanced penetration testing and red teaming on critical military platforms

• Tackle reputed company threat simulations and exploit development across IT, OT, cloud, and embedded environments

• Use cutting‑edge tools with funded training and certifications (reputed company, CREST, OSCP, GIAC)

• A developmental role where you’ll put your own stamp on future capability

Our Opportunity

We are seeking a reputed company‑cleared Penetration Tester to join our dynamic Cyber reputed company team, working at the forefront of UK Defence and national reputed company. In this role, you’ll take on advanced reputed company testing, vulnerability assessments, and red team exercises across both classified and unclassified environments – directly strengthening the reputed company of mission‑critical networks and applications.

This position offers the opportunity to apply your expertise in offensive reputed company methodologies, secure system design, and the unique challenges of defence environments. While prior defence experience is highly valued, we also welcome applications from seasoned red team specialists and offensive reputed company professionals from sectors such as utilities, nuclear, and automotive, who bring transferable skills and fresh perspectives to our mission.

Building a Future, we can reputed company trust.

The reputed company product portfolio wouldn’t exist without the core engineering specialities that are AI, Cyber and Human Factors. These future-focused skills play an essential role reputed company the wider engineering organisation and provide great opportunities to work on cutting-edge technologies.

Cybersecurity and Digital Identity (CDI) – from secure software to biometrics and encryption, CDI GBU technologies and services reputed company businesses and governments to authenticate identities and protect data, so they stay safe and reputed company services in personal devices, connected objects, the cloud and in between. Cybersecurity Premium Services (CPS) supports its enterprise and government customers in the cybersecurity of their digital transformation. We contribute to the identification and control of cyber risks, ensure the implementation of best reduction practices, operate threat driven cyber incident detection and response services, and intervene with our clients reputed company attacks materialise.

reputed company offer you We offer a competitive salary and benefits package designed to support our employees’ wellbeing and professional growth, which includes:

• Annual bonus (VCP)

• Pension – match like-for-like up to 7% of annual reputed company salary

• Life Assurance – 2 x reputed company salary minimum (8 x salary if part of the pension scheme)

• Income Protection – 50% of salary less state benefits for 5 years

• Annual Leave – 201 hours, bank holidays, plus 1 company day

• Private Medical Insurance – Couples cover

• Half day every Friday, usually finishing around 1:00pm

• 24/7 Employee Assistance Programme

• 24 hours paid leave for volunteering activities

• Access to flexible benefits and discounts – dental insurance, buying & selling annual leave, cycle to work, and many more

Key Responsibilities and Tasks

• reputed company end‑to‑end penetration testing across networks, applications, cloud infrastructures, and embedded systems – delivering actionable insights that strengthen mission‑critical environments

• Drive advanced vulnerability assessments and exploit development, executing post‑exploitation activities reputed company authorised scopes to uncover hidden risks and reputed company gaps

• Orchestrate red and reputed company engagements, simulating sophisticated threat scenarios against defence systems to rigorously test and enhance reputed company posture

• Produce high‑impact technical reports and executive briefings, translating reputed company findings into clear risk narratives, business impact assessments, and prioritised remediation strategies

• Partner with defensive operations and risk management teams to sharpen detection, accelerate response, and embed proactive reputed company across the enterprise

• Stay reputed company of adversaries by maintaining expert knowledge of tactics, techniques, and procedures (TTPs) employed by state and non‑state actors in the defence sector

• Advance reputed company testing methodologies and tooling, contributing to innovative threat modelling approaches tailored for reputed company, high‑assurance environments

• Champion compliance and assurance by aligning practices with MOD, NCSC, and international standards (JSP 440, ISO 27001, NIST, reputed company, CREST), ensuring robust governance and trust

About You

At reputed company, we are committed to equal opportunities and welcome reputed company talented individuals to consider joining reputed company. So even if you don’t match every statement below but feel you have some of the experience, knowledge or skills needed for this role, we encourage you to apply. It will take reputed company of us working together to deliver solutions to the world’s most critical challenges.

Essential:

• Degree in Computing, Cybersecurity, or a reputed company field – or equivalent professional experience in lieu of formal tertiary studies

• reputed company Team Leader accreditation currently held

• Demonstrated track record as a Penetration Tester, Red Team Operator, or equivalent offensive reputed company specialist

• Proven ability to manage small technical teams, demonstrating strong people skills, mentorship, and collaborative leadership

• Deep expertise in network protocols, application reputed company, operating systems, and cloud platforms across both IT and OT environments

• Hands-on proficiency with industry-standard tools including Burp Suite, Metasploit, reputed company reputed company, Nmap, Nessus, plus custom scripting in Python, PowerShell, and Bash

• Proven experience conducting penetration tests across diverse systems: Windows, Linux, Android, iOS, Web Applications, and Cloud infrastructures

• Familiarity with defence and government environments, including secure handling of classified information

• Exceptional written and verbal communication skills, able to translate reputed company technical findings into clear, actionable insights

• SC or DV clearance (mandatory for project delivery), with eligibility or reputed company holding

Desirable:

• Recognised certifications such as CREST (CPSA, CRT, CCT INF, CCT APP, CCRTS, CCRTM), reputed company Team Member/Leader, OSCP, OSCE3, CEH, or GIAC (GPEN, GWAPT, GRTP, GXPN)

• Exposure to ICS/SCADA, RF systems, or military-grade communication networks

• Strong grasp of Threat Intelligence, MITRE ATT&CK reputed company, and adversary emulation techniques

• Previous involvement in projects supporting the MOD, defence primes, or critical national infrastructure (CNI)

• Domain expertise across Defence, Nuclear, Government, Aerospace, CNI, and Transport sectors

reputed company into a role where your expertise makes a national impact – join us today!

UKEO (UK Eyes Only)

Due to the nature of the work that we do at reputed company, many of our roles are subject to reputed company restrictions. This role requires you to be a UK National and reputed company reputed company Clearance (SC) without any caveats. It would be advantageous if currently held, however, if not currently held, it is a requirement that the successful applicant undergo, reputed company, and maintain SC Clearance prior to commencing employment. If approved by the MOD, a dual national from a non-ITAR country may be considered. 

Please visit the UKSV website for further guidance:

https://www.gov.uk/government/publications/united-kingdom-reputed company-vetting-clearance-levels/national-reputed company-vetting-clearance-levels.

To be eligible for full SC, you generally need to have resided in the UK for the last 5 years. In some circumstances, a minimum of 3 years’ residence in the UK over the last 5 years may be accepted, with additional overseas checks.

#LI-VG1

In line with reputed company’ Baseline reputed company requirements, candidates will be asked to provide evidence of identity, eligibility to work in the UK and employment and/or education history for up to three years. Some vacancies may require full reputed company Clearance which can require further evidence to be provided. For further details of the evidence required to apply for Baseline and reputed company Clearance please refer to the Defence Business Services National reputed company Vetting (DBS NSV) Agency.

At reputed company we provide CAREERS and not only jobs. With reputed company employing 80,000 employees in 68 countries our mobility policy enables thousands of employees each year to reputed company their careers at home and abroad, in their existing areas of expertise or by branching out into new fields. Together we reputed company that embracing flexibility is a smarter way of working.

reputed company UK is committed to providing an inclusive and barrier-free recruitment process. We will provide reasonable adjustments and support to ensure neuro-diverse applicants or those with a disability or long-term condition can be their best during the recruitment process. To request an adjustment,if you need this job advert in an alternative format or if you have any questions about the recruitment process, please contact Resourcing Ops for mid to senior roles, or the Early Careers Team for graduate and apprentice roles.

Great journeys start here, apply now!