Harry Thomas

Principal Industrial Pentester

Harry Thomas is a Principal Penetration Tester for Dragos Inc. Professional Services. Harry harnesses his experience and skills to educate his clients and increase their ICS security posture through offensive and defensive assessment services. His goal is to reduce mean time to incident response and containment through exercising red team specific TTPs or secure design architecture.

He began his career as a Cybersecurity Engineer for a DoD contractor designing secure critical infrastructure for federal clients. His expertise also encompasses IT security audits, including risk assessments and red teaming/penetration testing for the financial, healthcare, technology, and retail verticals.

Harry actively researches ICS protocols to help improve cyber event correlation, holds a Master of Science in Cybersecurity from Southern NH University, and is a frequent presenter at local BSIDES and industry conferences on topics such as “Hacking ICS: From Open Source Tools to Custom Scripts” and “Intro to ICS Protocols: Modbus, DNP3, and Ethernet/IP”.

Formal Education

  • Master of Science – Cybersecurity
  • Bachelor of Science – Health Information Management