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 www.sophos.com . 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 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. 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. #li-remote #li-ND2 #b2 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