Working at Cylus

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Network Security Researcher



Full time


Cylus is a fast-growing cybersecurity startup based in the heart of Tel Aviv, led by world-class cyber experts. Our mission is to protect millions of people, worldwide, from cyber threats specific to modern trains, keeping them safe and on time. 

We are looking for a talented and experienced Network Security Researcher to join our innovative R&D team in this exciting journey. If you have the right attitude and skills, we invite you to hop on board our bullet train,  create things that matter and have a real impact on the company’s tech, business and culture.

In this job you will

  1. Be the driving force in conducting deep, pioneer security research of rail networks to fuel the company’s core product 
  2. Optimize value for our users and partners by providing research insights to the company’s deployments 
  3. Be a crucial part of a vibrant R&D team of experienced engineers and security experts
  4. Work closely with product and business functions


  1. 3+ years of proven experience in security research, with aspects of network security assessments and protocols research
  2. 2+ years of experience in programming
  3. Strong knowledge and understanding of network architectures in layers 2-7
  4. Independent, fast-paced learner
  5. Have the ability to analyze protocols, down to the bytes level
  6. Proficient in using Wireshark and/or other packet capturing tools
  7. Experience in using data analysis tools such as Jupyter-Lab, Splunk,  ELK stack, etc.

Big plus:

  1. B.Sc. in Computer Science or equivalent military background
  2. Experience in analyzing protocols from critical infrastructure or transportation sectors
  3. Experience in writing Wireshark dissectors
  4. Experience in developing or implementing anomaly detection algorithms
  5. Experience in performing hands-on penetration testing

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