Senior Machine Learning Data Scientist


About Us
Sophos is a worldwide leader and innovator of advanced cybersecurity solutions, including Managed Detection and Response (MDR) and incident response services and a broad portfolio of endpoint, network, email, and cloud security technologies that help organizations defeat cyberattacks. As one of the largest pure-play cybersecurity providers, Sophos defends more than 500,000 organizations and more than 100 million users globally from active adversaries, ransomware, phishing, malware, and more. Sophos’ services and products connect through its cloud-based Sophos Central management console and are powered by Sophos X-Ops, the company’s cross-domain threat intelligence unit. Sophos X-Ops intelligence optimizes the entire Sophos Adaptive Cybersecurity Ecosystem, which includes a centralized data lake that leverages a rich set of open APIs available to customers, partners, developers, and other cybersecurity and information technology vendors. Sophos provides cybersecurity-as-a-service to organizations needing fully managed, turnkey security solutions. Customers can also manage their cybersecurity directly with Sophos’ security operations platform or use a hybrid approach by supplementing their in-house teams with Sophos’ services, including threat hunting and remediation. Sophos sells through reseller partners and managed service providers (MSPs) worldwide. Sophos is headquartered in Oxford, U.K. More information is available at 
Role Summary
We are currently seeking a motivated Senior machine Learning Data Scientist to join our Sophos AI team. Working in a multinational team, you will be involved in various Machine Learning projects through the full lifecycle from planning through to execution.
What You Will Do:
  • Apply general security and ML domain knowledge to problems, identify new avenues of research to apply to current projects.
  • With minimal supervision, define and execute experiments to support research on a project.
  • Independently explore data curation and labelling, and feature extraction using domain expertise
  • Document results of experiments, draw and support conclusions from those experiments; with assistance, evaluate business case/impact
  • Contribute significantly to group publications and presentations, including (with assistance) occasional lead or sole authorship of academic publications and presenting work at academic or industry conferences
  • Keep up to date on current research and developments in ML and security
  • Contribute to internal tools, including identifying gaps where new functionality would be helpful, and implementing significant changes to tools/frameworks to accommodate new technologies.
  • Integrate new models into existing frameworks and support hand-off to production
  • Support existing model releases, including updates and improvements as needed, and integration with internal tools and systems for production.
What You Will Bring:
  • 3-4 Years experience in Machine Learning.
  • Fluent in machine learning and statistical concepts.
  • General security domain knowledge, developing deeper expertise in some subdomain of security
  • Able to identify scientific literature relevant to a problem, grasp it and apply it.
  • Fluent in Python, a database query language like SQL, and familiar with a lower level language like C++.
  • Good general writing skills and ability to translate complex concepts for general consumption.
  • Competent at contributing to scientific papers with minimal assistance, but may need some support in crafting the scientific argument of a paper.
  • Responsible for executing the research program of more senior staff, but capable of thinking independently and creatively about how to solve tactical modelling and engineering problems.
  • Business level English language – both written and spoken.
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. Please refer to the location details in our job postings for further information.
·   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.  If you have any questions about Sophos’ data protection practices, please contact