Principal Threat Researcher

Abingdon, GB, OX14 3YP

Sophos Labs

Sophos is a worldwide leader in next-generation cybersecurity, protecting more than 500,000 organizations and millions of consumers in more than 150 countries from today’s most advanced cyberthreats. Powered by threat intelligence, AI and machine learning from SophosLabs and SophosAI, Sophos delivers a broad portfolio of advanced products and services to secure users, networks and endpoints against ransomware, malware, exploits, phishing and the wide range of other cyberattacks. Sophos provides a single integrated cloud-based management console, Sophos Central – the centerpiece of an adaptive cybersecurity ecosystem that features a centralized data lake that leverages a rich set of open APIs available to customers, partners, developers, and other cybersecurity vendors. Sophos sells its products and services through reseller partners and managed service providers (MSPs) worldwide. Sophos has major hubs around the globe. More information is available at www.sophos.com


SophosLabs Behaviour Protection Team: Our team are both recognized and active members in the wider threat research community. Take a look at some of their blogs / publications via the following links:






Principal Threat Researcher – TTP Detection


Threat hunter? Programmer? Data-driven?


We have a fantastic opportunity here at SophosLabs for a Principal Threat Researcher to join our global team of behaviour-based protection engineers, to hunt, to research, and to add real-time classification for indicators of compromise across our Windows product portfolio. Our highly skilled team of security experts deliver behaviour-based classification rules for Windows threats, that run in real time across Sophos customer base.


You will be passionate about the fundamental characteristics of malware and hacking attacks, and take satisfaction in finding, predicting & classifying new ways attackers will modify their attacks in an attempt to evade detection. You will be responsible for writing rules that are able to signal early to late-breaking IOCs that highlight customers under attack.




As a TTP Detection researcher, your problem domain will be:


  • Understanding malware kill chain & hands-on-keyboard attacks
  • Accurate & efficient classification of malicious & suspicious behaviours
  • Mapping IOCs to MITRE Att&ck matrix


Key responsibilities:


  • Author classification rules to identify malicious & suspicious use of TTPs
  • Analyze real world kill chains to discover new TTPs and gaps in coverage
  • Measure and tune TTP coverage through data mining, customer telemetry & internal sandbox feeds
  • Maintain playbooks on threat actor TTPs


Skills & experience required:


The successful candidate has strong knowledge of the Windows operating system, is familiar with building and measuring efficient computational data flows, and combining these skills to combat the continuous evolution of the threat landscape. You enjoy thinking creatively; combining your deep technical knowledge, your tenacity for innovation, and your can-do attitude to solve complex and challenging problems on a daily basis.


  • Bachelor degree in Computer Software (Computer Security preferable)
  • Programming experience, Python/Lua
  • Strong knowledge of Windows operating system, internals & forensic tools
  • Excellent grasp of MITRE Att&ck tactics, techniques & simulation
  • Big data experience, Elastic Search, Kibana, Redshift


In return, we offer a competitive salary and benefits package and of course the opportunity to join a dynamic and progressive team.



What’s Great About Sophos?

  • Our people are what makes Sophos special – we demonstrate shared vision, talent, innovation, and creativity, all of which are accompanied by a great sense of fun and team spirit.
  • Employee-led diversity and inclusion groups that build community within Sophos and provide internal education and advocacy (eg. Sophos Women in Tech group to improve gender parity, encourage gender-balanced leadership, and support career progression at Sophos)
  • Sophos Environment Network and employee challenges to contribute to sustainability and reduce our environmental footprint
  • Annual commitment to charity and fundraising across our global sites and volunteer days for employees to give back to local communities
  • Global trivia competitions to keep our minds sharp
  • Global Mental Health days off work for all Sophos to help employees relax and recharge
  • Monthly employee wellbeing webinars and training to support employee health and wellbeing
  • Employee rewards and thanks, such as our free annual subscription to Calm


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 that 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 opportunites 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. If you have any questions about Sophos' data protection practices, please contact dataprotection@sophos.com.

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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