Threat Researcher - Linux

Sophos

2d•Remote

About The Position

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. Sophos is looking for a Linux Threat Researcher to join their team. The ideal candidate has extensive knowledge of Linux internals, is fluent in assembly, and has a knack for getting to the bottom of any issue. They enjoy thinking creatively, combining deep technical knowledge, tenacity for innovation, and a can-do attitude to solve complex and challenging problems on a daily basis.

Requirements

Deep knowledge of Linux operating system, internals and APIs
Experience in computer security and/or threat research
Dynamic and static malware analysis experience
Programming experience

Nice To Haves

Threat hunting
Data mining
Reverse engineering skills
Knowledge of exploitation techniques
Knowledge of offensive tools and techniques

Responsibilities

Implementing context-aware & behavior-based detection to provide multiple layers of protection from attacks targeting Linux infrastructure
Mapping protection & detection of attack behaviors to MITRE ATT&CK framework
Linux kernel exploit research and detection
Threat hunting, data mining, and using other methods of research to discover new threats to Linux and opportunities to improve protection
Working with product teams to adapt protection technology to the rapidly evolving threat landscape
Reverse engineering and debugging malware, understanding the complete end-to-end kill chain, from attack vector to persistent payload
Publish research articles and whitepapers on the corporate blog

Benefits

additional compensation including bonus eligibility
a comprehensive benefits package
Sophos operates a remote-first working model, making remote work the primary option for most employees
Our people â€“ 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