Senior Threat Researcher – Behavioral Protection

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

What You Will Do

• • Analyze malware behaviors aligned with MITRE ATT&CK TTPs (and beyond), covering the full attack lifecycle, including initial access vectors, execution techniques, payload delivery—with a strong focus on in-memory techniques, fileless malware, and evasive behaviors.

  • Research and identify behavioral techniques employed by novel and sophisticated Advanced Persistent Threats (APTs) and translate these insights into effective behavioral protection rules to enhance prevention capabilities.

  • Drive protection coverage for zero-day malware and novel attack techniques.

  • Work independently with minimal supervision while managing priority protection tasks.

  • Review and provide actionable feedback on detection logic and code developed by fellow researchers.

  • Collaborate with the team to define clear protection priorities and deliver updates to customers in a timely manner.

  • Produce quality threat analysis reports for both internal and external audience

What You Will Bring

• • Proven hands-on experience in Windows based malware analysis using both static and dynamic analysis tools such as using IDAPro and Windbg.

  • Deep understanding of behavioral techniques, memory injection methods, persistence mechanisms, and evasion tactics.

  • Ability to write robust, high-quality behavioral protection rules.

  • Demonstrated programming experience, preferably Python, Lua.

  • Experience working in a fast-paced threat research or security operations environment.

  • Strong communication skills and the ability to provide technical mentorship to peers.

  • Proactive, self-driven mindset with the ability to lead in critical incident or zero-day response scenarios.