Senior Threat Researcher
Senior Threat Researcher

Senior Threat Researcher

Chertsey Full-Time 43200 - 72000 £ / year (est.) No home office possible
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At a Glance

  • Tasks: Join our team to research and analyse cybersecurity threats, turning data into impactful narratives.
  • Company: F5 is a leader in cybersecurity, empowering organisations to secure and innovate in the digital world.
  • Benefits: Enjoy fully remote work, exceptional benefits, and a culture that supports your whole life.
  • Why this job: Be part of a passionate team, influencing the future of cybersecurity while enjoying autonomy in your projects.
  • Qualifications: 10 years in cybersecurity, strong coding skills in Python, and excellent communication abilities required.
  • Other info: Opportunity to engage with the security community through blogs, webinars, and industry events.

The predicted salary is between 43200 - 72000 £ per year.

At F5, we strive to bring a better digital world to life. Our teams empower organizations across the globe to create, secure, and run applications that enhance how we experience our evolving digital world. We are passionate about cybersecurity, from protecting consumers from fraud to enabling companies to focus on innovation. Everything we do centers around people. That means we obsess over how to make the lives of our customers, and their customers, better. And it means we prioritize a diverse F5 community where each individual can thrive.

Life at F5 is never dull. We are constantly identifying industry trends and disruptions, and innovating to get ahead of future customer needs. We are passionate about securing applications for our customers which include the Global and Fortune 100, federal and local government services, and many others worldwide. But our success isn’t driven solely by what we do. We also care deeply about how we do it. At F5, our culture is how we live, every single day. And it’s producing extraordinary results—not only for our customers, but also for our employees. We understand that your life is about more than just work, so we’re committed to a culture that supports your whole life. For this role, we are offering a fully remote work arrangement with F5’s exceptional benefits.

Position Summary

F5 Labs is seeking a driven, analytical, and articulate cybersecurity researcher to join our small, focused threat research team. We’re looking for someone with a passion for uncovering trends in attacker behaviour and communicating their findings clearly to both technical and non-technical audiences. As a Senior Cybersecurity Threat Researcher, you’ll explore sensor attack logs, uncover long-term attack trends, automate analysis, build prototypes and tools, and turn raw data into compelling narratives that educate and influence. Our team’s work supports F5’s broader marketing and thought leadership goals—not through paid services, but by sharing our expertise through public reports, articles, and tools. This is an ideal role for someone who enjoys autonomy, can own projects from idea to publication, and is equally comfortable writing Python as they are writing a blog post or speaking on a webinar.

Primary responsibilities

  • Research and analyze malicious traffic and attacker behavior across web, API, and application-layer protocols to uncover long-term patterns and emerging trends.
  • Build small tools, scripts, or datasets to support your research or contribute to the broader security community.
  • Translate complex findings into articles, reports, visuals, or presentations for a wide range of audiences.
  • Collaborate with a small team of researchers, engineers, and communicators to deliver timely and relevant insights.
  • Represent F5 Labs externally via blog posts, webinars, podcasts, media interviews, and industry events.
  • Support marketing and sales enablement efforts with high-impact research and commentary.
  • Maintain a strong understanding of offensive and defensive security practices, with a particular focus on web, API, bot, and DDoS-related threats.
  • Optionally, participate in proactive research efforts including honeypots, probing attacker infrastructure, and experimenting with emerging technologies like AI security.

Qualifications

  • ~10 years of experience in cybersecurity or a closely related field.
  • Strong grasp of common web, cloud, and API protocols and their associated attack surfaces (e.g., HTTP/S, REST, OAuth, DNS, TLS, etc.).
  • Experience analyzing network and application-layer telemetry to extract meaningful security insights.
  • Strong coding and data handling skills, especially in Python and Jupyter (SQL or BigQuery a plus).
  • Excellent written, visual, and verbal communication skills, with a clear ability to tell stories with data.
  • A self-starter who can independently define and deliver meaningful research projects.
  • Public speaking experience or a willingness to represent research externally.
  • Enthusiastic about educating others and promoting good security practices.

Bonus Points For

  • Experience with bot mitigation, DDoS defense, or abuse/fraud detection.
  • Background in threat intelligence, red teaming, or application-layer defenses.
  • Understanding of AI/ML-related security topics or adversarial techniques.
  • Experience building or analyzing honeypots or engaging with attacker infrastructure.
  • Contributions to open-source projects, security blogs, or research papers.

Education

  • BSc or equivalent experience in cybersecurity, computer science, or a related field.
  • Industry certifications such as CISSP, OSCP, or CEH are welcome but not required.
  • Experience working with security datasets and publishing externally preferred.
  • A visible presence in the security research community is a plus, but not required.

Senior Threat Researcher employer: F5

At F5, we are dedicated to fostering a vibrant and inclusive work environment where innovation thrives. As a Senior Threat Researcher, you will enjoy the flexibility of a fully remote role while benefiting from our exceptional perks, including comprehensive health plans and professional development opportunities. Our culture prioritises work-life balance and encourages personal growth, making F5 an outstanding employer for those passionate about cybersecurity and making a meaningful impact.
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Contact Detail:

F5 Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Threat Researcher

✨Tip Number 1

Familiarise yourself with the latest trends in cybersecurity, especially around web, API, and application-layer protocols. This knowledge will not only help you understand the role better but also allow you to engage in meaningful conversations during interviews.

✨Tip Number 2

Showcase your passion for research by actively participating in online forums or communities related to cybersecurity. Engaging with others in the field can provide valuable insights and demonstrate your commitment to staying updated on industry developments.

✨Tip Number 3

Prepare to discuss your previous projects in detail, particularly those involving Python and data analysis. Being able to articulate your thought process and the impact of your work will set you apart from other candidates.

✨Tip Number 4

Consider creating a portfolio that includes examples of your research, articles, or any public speaking engagements. This tangible evidence of your expertise can significantly enhance your application and show your ability to communicate complex ideas effectively.

We think you need these skills to ace Senior Threat Researcher

Cybersecurity Expertise
Analytical Skills
Research Skills
Python Programming
Data Handling
Network and Application-layer Telemetry Analysis
Communication Skills
Technical Writing
Public Speaking
Understanding of Web, API, and Cloud Protocols
Knowledge of Offensive and Defensive Security Practices
Experience with DDoS Defense and Bot Mitigation
Familiarity with AI/ML Security Topics
Collaboration Skills
Self-starter Attitude

Some tips for your application 🫡

Tailor Your CV: Make sure your CV highlights relevant experience in cybersecurity, particularly focusing on your skills in analysing malicious traffic and attacker behaviour. Use specific examples that demonstrate your ability to translate complex findings into clear narratives.

Craft a Compelling Cover Letter: In your cover letter, express your passion for cybersecurity and your enthusiasm for the role at F5. Mention how your background aligns with their mission of enhancing digital security and your experience in communicating technical information to diverse audiences.

Showcase Your Projects: If you have worked on any relevant projects, especially those involving Python coding or data analysis, be sure to include them in your application. Highlight any tools or scripts you've built that contributed to the security community.

Prepare for Public Speaking: Since the role involves representing F5 Labs externally, mention any public speaking experience you have. If you haven't had the opportunity yet, express your willingness to engage in webinars or industry events to share your research.

How to prepare for a job interview at F5

✨Showcase Your Passion for Cybersecurity

Make sure to express your enthusiasm for cybersecurity during the interview. Share specific examples of projects or research you've undertaken that demonstrate your commitment to the field, especially those related to attacker behaviour and trends.

✨Prepare to Discuss Technical Skills

Be ready to talk about your experience with coding, particularly in Python and Jupyter. Highlight any tools or scripts you've built that relate to threat research, and be prepared to explain how you used them to derive insights from data.

✨Communicate Clearly and Effectively

Since the role involves translating complex findings into accessible content, practice explaining your research in simple terms. Prepare to discuss how you've communicated technical information to non-technical audiences in the past.

✨Demonstrate Collaboration Skills

F5 values teamwork, so be ready to share experiences where you've collaborated with others on research projects. Discuss how you contributed to team efforts and how you can bring that collaborative spirit to their focused threat research team.

Senior Threat Researcher
F5
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  • Senior Threat Researcher

    Chertsey
    Full-Time
    43200 - 72000 £ / year (est.)

    Application deadline: 2027-07-18

  • F

    F5

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