About Us

Cylus is the global leader in rail cybersecurity, helping mainline and urban railway companies prevent security incidents and service disruptions caused by cyber-attacks. With over $50M in funding by top VCs and strategic investors, global customers, and strong partnerships with major railway integrators, we make a significant impact on the multi-hundred-billion-dollar global railway industry.

We are looking for a talented Network Security Researcher to join our innovative R&D team. This is your chance to be part of a company at the forefront of rail cybersecurity—hop on board!

In This Role, You Will

• Conduct pioneering security research on rail networks to fuel the company’s core product.
• Analyze active, safety-critical railway network communication to uncover insights that bolster cybersecurity across our deployments and the wider railway sector.
• Develop and refine ML models for extracting security and visibility insights from real-world network traffic.
• Collaborate closely with a vibrant R&D team of experienced engineers and security experts.
• Work hand-in-hand with product and business functions to integrate research findings into Cylus’s solutions.

Requirements

• 3+ years of experience in security research, including network security assessments and protocol analysis.
• 2+ years of programming experience (e.g., Python, C++, or similar).
• Strong understanding of network architectures (Layers 2-7) and the ability to analyze protocols down to the byte level.
• Proficiency with Wireshark and/or other packet-capturing and reversing tools.
• Experience using data analysis tools (e.g., Pandas, JupyterLab, Splunk).
• Independent, fast-paced learner who thrives in a dynamic environment.

‍Big Plus

• Vast ML background with hands-on experience applying various techniques (e.g., clustering, decision trees, neural networks) to real-world problems, and production environments.
• Track record of developing or implementing anomaly detection algorithms.

Hands-on experience analyzing network communication in critical infrastructure or transportation environments.