Threat Researcher

About Us 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 More information is available at www sophos com Role Summary As a Sophos Labs Threat Response Engineer you will be responsible for providing protection against malware email spam and other cyber-threats What you will do You will be analyzing new malware and spam samples developing protection against them and handling other protection issues reported by our customers in a timely manner and with quality Analyze files reported by our customers to determine their type and risk level Create first-line detection signatures for new malicious Windows executable Monitor email spam protection levels and respond to spam outbreaks in a timely manner using appropriate anti-spam detection technology available Triage and manage cyber-threat related requests coming from our customers by collecting all the necessary information responding to standard requests and escalating complex issues to problem domain experts for resolution Handle false positive reports from customers triggered in anti-spam URL filtering or anti-malware filtering layers Use Sophos data publishing systems to build test and release protection updates for customer use Write descriptions for threats for publication on the Sophos website to raise customer awareness Weekend shift work will be required Night-time shift work will be required What you will bring 3-5 years of overall experience in hunting and analysing spam email campaigns Good understanding of common Internet standards HTTP SMTP DNS Whois HTML RFC822 SSH Understanding of Windows OS fundamentals In depth understanding of Regular expressions Basic understanding of computer and IT security Practical understanding of PE file format structures is good to have Reverse engineering with IDA or other tools is good to have Scripting experience Shell Perl Python JavaScript Linux user experience in Computer Science or equivalent Special conditions Weekend shift work will be required Night-time shift work will be required LI-Remote B1 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