Remote Cybersecurity Penetration Tester

Location: Remote UK, United Kingdom Thales people architect identity management and data protection solutions at the heart of digital security. 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 make the connected world more secure. Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of people each day to make life better, and keep us safer. We innovate across the major industries of Aerospace, Defence, Security 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 flex your start and finish times. Where possible, we support a working pattern that suits your lifestyle and helps you reach 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 security! What the role has to offer

• Safeguard UK Defence systems through advanced penetration testing and red teaming on critical military platforms
• Tackle complex threat simulations and exploit development across IT, OT, cloud, and embedded environments
• Use cutting‑edge tools with funded training and certifications (CHECK, CREST, OSCP, GIAC)
• A developmental role where you’ll put your own stamp on future capability

Our Opportunity We are seeking a security‑cleared Penetration Tester to join our dynamic Cyber Security team, working at the forefront of UK Defence and national security. In this role, you’ll take on advanced security testing, vulnerability assessments, and red team exercises across both classified and unclassified environments – directly strengthening the resilience of mission‑critical networks and applications. This position offers the opportunity to apply your expertise in offensive security 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 security professionals from sectors such as utilities, nuclear, and automotive, who bring transferable skills and fresh perspectives to our mission. Building a Future, we can all trust. The Thales 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 within 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 enable businesses and governments to authenticate identities and protect data, so they stay safe and enable 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 when attacks materialise. What we 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 base salary
• Life Assurance – 2 x base 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

• Lead 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 within authorised scopes to unco