Sophos

Penetration Tester

United Kingdom

Full-Time

Remote

TLDR

As a key member of the Cyber Security team, you will perform penetration testing against Sophos applications and infrastructure to improve security posture without direct customer interaction.

About Us Sophos is a global leader and innovator of advanced security solutions for defeating cyberattacks. The company acquired Secureworks in February 2025, bringing together two pioneers that have redefined the cybersecurity industry with their innovative, native AI-optimized services, technologies and products. Sophos is now the largest pure-play Managed Detection and Response (MDR) provider, supporting more than 28,000 organizations. In addition to MDR and other services, Sophos’ complete portfolio includes industry-leading endpoint, network, email, and cloud security that interoperate and adapt to defend through the Sophos Central platform. Secureworks provides the innovative, market-leading Taegis XDR/MDR, identity threat detection and response (ITDR), next-gen SIEM capabilities, managed risk, and a comprehensive set of advisory services. Sophos sells all these solutions through reseller partners, Managed Service Providers (MSPs) and Managed Security Service Providers (MSSPs) worldwide, defending more than 600,000 organizations worldwide from phishing, ransomware, data theft, other every day and state-sponsored cybercrimes. The solutions are powered by historical and real-time threat intelligence from Sophos X-Ops and the newly added Counter Threat Unit (CTU). Sophos is headquartered in Oxford, U.K. More information is available at www.sophos.com. What You Will Do (Duties and Responsibilities)

Organize, plan and deliver penetration tests against Sophos web applications across a wide range of technologies

Organize, plan and deliver penetration tests against the Sophos infrastructure including on-premise networks, AWS/Azure and virtual environments

Use AI-assisted workflows (including internal agents/skills where available) to augment penetration testing activities and improve coverage and efficiency, with appropriate oversight and review

Assist in the scoping, planning and delivery of pentests by 3rd party vendors

Disseminate results to teams throughout the business

Work closely with the wider Cybersecurity team to develop common goals and outcomes

What You Will Bring (Experience and Qualifications)

A solid background in both application and infrastructure penetration testing

Familiarity with common web technologies (PHP, Javascript, API etc)

Good knowledge of offensive techniques, OWASP & MITRE ATT&CK frameworks

Experience working with or assessing systems that incorporate AI or LLMs, including an understanding of common AI‑related security risks and abuse scenarios

Experience in delivery of security testing projects

Practical knowledge of AWS technologies (S3, EC2, IAM, Lambda etc)

Good interpersonal & networking skills

Industry recognised ethical hacking qualifications: OSCP, GPEN or equivalent

Ready to Join Us?

At Sophos, we believe in the power of diverse perspectives to fuel innovation. Research shows that candidates sometimes hesitate to apply if they don't check every box in a job description. We challenge that notion. Your unique experiences and skills might be exactly what we need to enhance our team. Don't let a checklist hold you back – we encourage you to apply.

What's Great About Sophos?

· Sophos operates a remote-first working model, making remote work the primary option for most employees. However, some roles may necessitate a hybrid approach. While we are a remote first organization, applicants must have legal authorization to work in the jurisdiction where the position is posted, without requiring employer sponsorship.

· Our people – we innovate and create, all of which are accompanied by a great sense of fun and team spirit

· Employee-led diversity and inclusion networks that build community and provide education and advocacy

· Annual charity and fundraising initiatives and volunteer days for employees to support local communities

· Global employee sustainability initiatives to reduce our environmental footprint

· Global fitness and trivia competitions to keep our bodies and minds sharp

· Global wellbeing days for employees to relax and recharge

· Monthly wellbeing webinars and training to support employee health and wellbeing

Our Commitment To You

We’re proud of the diverse and inclusive environment we have at Sophos, and we’re committed to ensuring equality of opportunity. We believe that diversity, combined with excellence, builds a better Sophos, so we encourage applicants who can contribute to the diversity of our team. All applicants will be treated in a fair and equal manner and in accordance with the law regardless of gender, sex, gender reassignment, marital status, race, religion or belief, color, age, military veteran status, disability, pregnancy, maternity or sexual orientation. We want to give you every opportunity to show us your best self, so if there are any adjustments we could make to the recruitment and selection process to support you, please let us know.

Data Protection

If you choose to explore an opportunity, and subsequently share your CV or other personal details with Sophos, these details will be held by Sophos for 12 months in accordance with our Privacy Policy and used by our recruitment team to contact you regarding this or other relevant opportunities at Sophos. If you would like Sophos to delete or update your details at any time, please follow the steps set out in the Privacy Policy describing your individual rights. For more information on Sophos’ data protection practices, please consult our Privacy Policy Cybersecurity as a Service Delivered | Sophos

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Sophos

Sophos builds advanced security solutions designed to protect against cyberattacks, delivering comprehensive services like Managed Detection and Response (MDR) and endpoint, network, and email security. Targeting organizations across the globe, Sophos serves over 600,000 clients, utilizing the expertise of their combined technologies following the acquisition of Secureworks. Their unique offerings interoperate through the Sophos Central platform, fortified by real-time threat intelligence from their dedicated threat teams.

Founded: Founded 1985
Employees: 500+ employees
Industry: Professional Services

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Penetration Tester

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