Junior Penetration Tester

About Us Sophos is a cybersecurity leader defending 600,000 organizations globally with an AI-driven platform and expert-led services. Sophos meets organizations wherever they are in their security maturity and grows with them to defeat cyberattacks. Its solutions combine machine learning, automation, and real-time threat intelligence with frontline human expertise from Sophos X-Ops to deliver advanced, 24/7 threat monitoring, detection, and response. Sophos offers industry-leading managed detection and response (MDR) alongside a comprehensive portfolio of cybersecurity technologies — including endpoint, network, email, and cloud security, extended detection and response (XDR), identity threat detection and response (ITDR), and next-gen SIEM. Together with expert advisory services, these capabilities help organizations proactively reduce risk and respond faster, with the visibility and scalability needed to stay ahead of evolving threats. Sophos goes to market with a global partner ecosystem, including Managed Service Providers (MSPs), Managed Security Service Providers (MSSPs), resellers and distributors, marketplace integrations, and cyber risk partners, giving organizations the flexibility to choose trusted relationships when securing their business. Sophos is headquartered in Oxford, U.K. More information is available at www.sophos.com.

Role Summary

​​As a security company, Sophos takes its own security very seriously and has a Cyber Security team which focuses on protecting our own products, systems and infrastructure. We’ll need you to contribute to the continual improvement of our security posture through the testing of Sophos applications and infrastructure. This role is not customer facing which means you not only get to perform tests but also see the impact of your findings as you help the teams design and architect resolutions to the issues you find.

The ideal candidate will have real-world experience in a Red Team and previously worked on all stages of penetration testing from scoping to reporting.

You’ll need to be highly motivated, have an innovative mind-set and a good attention to detail. You will need to stay up to date with the latest techniques and threats and apply this knowledge to help protect Sophos and our customers.
This a great opportunity to help secure a world-leading cybersecurity company. As you’d expect you’ll be joining an organization that takes security seriously. You will become a key member of the Cyber Security team working with some world-leading experts from across the company in a fast-paced and varied environment where security is a priority.​

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