Penetration Tester at Sophos | United Kingdom

Sophos Ltd. is seeking a Penetration Tester to join its Cyber Security team in the United Kingdom. This position focuses on strengthening internal security by identifying and testing vulnerabilities across Sophos applications and infrastructure. The role involves close collaboration with other teams to ensure that assessment results translate into practical …

About UsSophos is a leading global provider of advanced security solutions designed to combat cyber threats. Following our acquisition of Secureworks in February 2025, we have united two industry pioneers to reshape the cybersecurity landscape with innovative, AI-optimized services and products. As the largest dedicated Managed Detection and Response (MDR) provider, Sophos safeguards over 28,000 organizations worldwide. Our extensive portfolio encompasses top-tier endpoint, network, email, and cloud security solutions, all integrated within the Sophos Central platform. Secureworks enhances our offerings with its cutting-edge Taegis XDR/MDR, identity threat detection and response (ITDR), and advanced SIEM capabilities, along with managed risk and advisory services. Collectively, we defend more than 600,000 organizations globally against phishing, ransomware, data breaches, and various cyber threats, leveraging real-time threat intelligence from Sophos X-Ops and the Counter Threat Unit (CTU). Headquartered in Oxford, U.K., you can learn more at www.sophos.com.IT at Sophos is the driving force behind our business capabilities, applications, and services that realize our company’s vision. Our team, led by experienced professionals in the security industry, thrives on innovation and agility, delivering cutting-edge solutions that empower our growth. By joining us, you will become part of a culture that values creativity and excellence, with a strong commitment to your professional development and career advancement. Role SummaryAs a Senior Identity Engineer, you will play a pivotal role in managing our corporate identity framework, which is fundamental to our operational integrity and compliance initiatives. We seek a highly skilled professional to join our team of Subject Matter Experts (SMEs) in overseeing our modern identity stack, encompassing everything from Passkeys to Identity Governance and Administration (IGA) processes.

About UsSophos is a leading innovator in advanced security solutions, committed to empowering organizations to combat cyber threats effectively. Following our acquisition of Secureworks in February 2025, we have merged the expertise of two industry pioneers, redefining the cybersecurity landscape with AI-driven services and technologies. As the largest pure-play Managed Detection and Response (MDR) provider, we protect over 600,000 organizations globally from various cyber threats, including phishing and ransomware. Our comprehensive security portfolio includes cutting-edge endpoint, network, email, and cloud protection, all seamlessly integrated through the Sophos Central platform. With a robust threat intelligence backbone from Sophos X-Ops and the Counter Threat Unit (CTU), we ensure our clients receive unparalleled security. For more information, please visit www.sophos.com.Role Summary We are on the lookout for a meticulous and technically proficient Senior Threat Researcher to join our X-OPS team. In this pivotal role, you will analyze sophisticated security threats—from malware to intricate web assaults—and convert threat intelligence into precise detections across our systems. Your contributions will ensure our analysts and clients receive timely, actionable alerts with minimal false positives. Utilizing data from over 40 third-party and internal sources, you will collaborate with our CTU Threat Intelligence team and employ various scripting and automation tools to enhance our detection capabilities. The ideal candidate is a hands-on security expert with profound knowledge of endpoint behavior, cloud dynamics, and detection development, thriving in a fast-paced technical environment.

Sophos Ltd. is a global cybersecurity company headquartered in Oxford, UK, serving over 28,000 organizations with a range of security solutions. Following its acquisition of Secureworks in February 2025, Sophos became the largest pure-play Managed Detection and Response (MDR) provider. Its offerings span endpoint, network, email, and cloud security, all managed through the Sophos Central platform. Secureworks adds Taegis XDR/MDR, identity threat detection and response, next-generation SIEM, managed risk, and advisory services. Together, Sophos and Secureworks protect more than 600,000 organizations worldwide from threats such as phishing, ransomware, data theft, and state-sponsored attacks. Solutions are delivered through partners and informed by real-time threat intelligence from Sophos X-Ops and the Counter Threat Unit (CTU). More information is available at www.sophos.com. Role overview The Senior Software Engineer - Quality Engineering & Testing role centers on building quality into products from the outset. This position combines hands-on testing, automation, and close collaboration with development teams. Quality engineering is at the core, with a focus on designing systems and developing tools to support software reliability and scalability. Manual testing is included when it provides clear value, but the emphasis remains on automation and modern testing methods. There is also scope to influence how AI is applied to quality engineering, exploring practical uses beyond code assistants. This area is evolving and offers room for experimentation and impact. What you will do Integrate quality practices across the software development lifecycle Design and build test automation systems and tools Carry out manual testing where it delivers the most benefit Work with development teams to deliver reliable, scalable software Contribute to the development of AI-driven approaches in quality engineering Who thrives here This role is well-suited to engineers who enjoy tackling practical challenges, improving team processes, and approaching software quality with pragmatism. The team values hands-on contributions and welcomes those interested in shaping the direction of quality engineering. Location United Kingdom

About Sophos Ltd. Sophos Ltd., based in Oxford, UK, delivers advanced security solutions to organizations worldwide. After acquiring Secureworks in February 2025, Sophos combined expertise from both companies to expand its cybersecurity offerings. The company now stands as the largest dedicated Managed Detection and Response (MDR) provider, supporting over 28,000 organizations. Sophos Central integrates endpoint, network, email, and cloud security. The product suite also features Secureworks' Taegis XDR/MDR, identity threat detection and response (ITDR), next-generation SIEM, managed risk, and advisory services. Through a wide network of reseller partners, MSPs, and MSSPs, Sophos protects more than 600,000 organizations from threats such as phishing, ransomware, and data breaches. Real-time threat intelligence comes from Sophos X-Ops and the Counter Threat Unit (CTU). More information is available at www.sophos.com. Role Overview: Senior Revenue Accountant The Senior Revenue Accountant oversees financial accounting, period-end closure, and reporting for the Revenue function. This position reports to the Senior Director of Revenue Operations.

About UsSophos is at the forefront of cybersecurity innovation, providing advanced security solutions to combat cyber threats. Following our acquisition of Secureworks in February 2025, we have become the largest dedicated Managed Detection and Response (MDR) provider globally, safeguarding over 28,000 organizations. Our comprehensive portfolio includes top-tier services in endpoint, network, email, and cloud security, all seamlessly integrated through the Sophos Central platform. Our partnership with Secureworks enhances our offerings with cutting-edge Taegis XDR/MDR solutions and advanced identity threat detection. With over 600,000 organizations protected worldwide, our solutions leverage both historical and real-time intelligence from Sophos X-Ops and the Counter Threat Unit (CTU). Based in Oxford, U.K., we invite you to learn more at www.sophos.com.We are seeking a dynamic and creative Senior Social Media and Video Content Specialist to elevate our brand presence across social media platforms. This position is perfect for an individual who excels at producing engaging video content, possesses a keen eye for storytelling through motion, and is adept at optimizing material for platforms such as YouTube and LinkedIn.