Senior Threat Researcher

Abingdon, GB, OX14 3YP

Sophos Labs

As a worldwide leader in next-generation cybersecurity, Sophos protects nearly 400,000 organizations of all sizes in more than 150 countries from today’s most advanced cyberthreats. Powered by SophosLabs – a global threat intelligence and data science team – Sophos’ cloud-native and AI-enhanced solutions secure endpoints (laptops, servers and mobile devices) and networks against evolving cybercriminal tactics and techniques, including automated and active-adversary breaches, ransomware, malware, exploits, data exfiltration, phishing, and more.

The award-winning Sophos Central cloud-based platform integrates Sophos’ entire portfolio of best-of-breed products, from the Intercept X endpoint solution to the XG Firewall, into a single system called Synchronized Security. Sophos products are exclusively available through a global channel of more than 47,000 partners and Managed Service Providers (MSPs). Sophos also makes its innovative commercial technologies available to consumers via Sophos Home. The company is headquartered in Oxford, U.K., and is publicly traded on the London Stock Exchange under the symbol “SOPH.”



Job Purpose


SophosLabs is recruiting a Threat Researcher to join our global team of highly skilled security experts to help secure and protect Sophos users and their systems worldwide from threats such as malware, exploits, spam and phishing.


SophosLabs is a global network of highly skilled and trained analysts and IT security professionals that is the front line in protecting businesses from known and emerging threats.


Our analysts cover every area of IT security with integrated systems tracking malware, vulnerabilities, intrusions, spam, legitimate applications, legitimate and infected websites and mobile threats. Our automated systems work with Big Data technologies and continuously populate databases with legitimate and malicious content.


Sophos is focused on delivering the best IT security and data protection for businesses. Today Sophos products protect over 100,000 businesses and 100 million users, in more than 150 countries. We provide an excellent, supportive, open and lively work environment with exposure to leading technologies and opportunities for professional development and training.


The candidate profile


As a Threat Researcher you will be part of the front line responsible for helping to protect millions of users worldwide from computer security threats like malware, spam and phishing.


The successful candidate will provide analysis and detection of the latest threats and help create the next generation of SophosLabs research tools. The ideal candidate is passionate about computer security and has high aptitude for solving challenging puzzles with an attention to detail.


Main duties

  • Analyze malware, spam campaigns and other threats
  • Reverse engineer files to discover their intended functionality and risks to customers
  • Create high-quality detection for threats
  • Build, test and publish detection data files
  • Write threat descriptions for publication on the Sophos website and threat research whitepapers.
  • Triage requests submitted by other departments, respond to tasks or escalate complex issues to senior team members
  • Answer customer queries routed through Technical Support and internal queries from all departments
  • Identify opportunities to write blogs for the Sophos website to raise customer awareness
  • Available for occasional weekend working



  • Proven problem-solving skills with an inquisitive nature
  • Proven ability to prioritize and organize assigned tasks
  • Possess an analytical and methodical approach to workflow
  • Good written and verbal communication skills
  • Ability to work both independently and as part of a global team
  • Understanding of basic executable file formats (MZ/NE/PE) or scripting basics (Perl/Python/Regexp)
  • Experience with a wide array of Internet technologies and protocols (HTML, JavaScript, SMTP, DNS)



  • Experience with x86 assembly
  • Experience in researching and reverse engineering malware using tools such as IDA Pro, WinDbg, OllyDbg and Hex editors
  • Computer & Web Security experience
  • Experience with a broad range of operating systems
  • Programming skills and experience (C/C++/Python/Perl)
  • Understanding of advanced executable file formats (ELF/DEX/Mach-O)
  • Familiarity with exploitable file formats including Java, PDF, Flash and Office documents
  • Published technical / whitepapers
  • Bachelor’s degree in Computer Software (or equivalent)


Equal Opportunities


Sophos is committed to equality opportunity in all areas of its work. All qualified applicants will be treated in a fair and equal manner and in accordance with the law regardless of gender, marital status, race, religion, colour, age, disability or sexual orientation.



If you choose to explore this 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 data protection policy which can be found here 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 reply to this or other emails from Sophos clearly stating your request, or follow the steps set out in the data protection policy describing your individual rights.  If you have any questions about Sophos’ data protection practices please contact

At Sophos, we want every organization to be protected by innovative, next-generation IT security, even those who don't have a huge IT staff. We protect organizations of all sizes, all around the world by making enterprise-grade security that is simple to deploy, manage, and use. It is our passion, and something we are truly proud of.

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