Senior Threat Researcher - Behavioral Protection

Role Summary
We are seeking a skilled and passionate Threat Researcher with deep expertise in Windows based threat behaviors, particularly having a strong understanding on memory-resident threats. In this role, you will be at the forefront of detecting and understanding emerging attack techniques, developing behavioral-based protection strategies, and enhancing our real-time protection capabilities. Your insights and contributions will directly impact on the security posture of millions of users worldwide.
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.

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

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's 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, and other everyday 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 .

In Canada, the base salary for this role ranges from $129,000 to $215,000. In addition to base salary, we offer additional compensation including bonus eligibility and a comprehensive benefits package. A candidate's specific pay within this range will depend on a variety of factors, including job-related skills, training, location, experience, relevant education, certifications, and other business and organizational needs.
Sophos operates a remote-first working model, making remote work the primary option for most employees. Applicants must have legal authorization to work in the jurisdiction where the position is posted, without requiring employer sponsorship.
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.
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