# Itamar Sher

> Itamar Sher is the CEO and co-founder of Seal Security, which backports security fixes to open source software versions organizations already use. A vulnerability researcher and former head of research at Cymmetria, he began reverse engineering in middle school, presented honeypot research at Black Hat and the Chaos Communication Congress, and co-authored the MTPot open source honeypot. He founded Seal with Lev Pachmanov and Alon Navon in 2022.

- **Role:** CEO & Co-Founder at Seal Security
- **Organizations:** Seal Security, Cymmetria, Gilgamesh Cyber Solutions Ltd., Cyber Company Inc., Israel Defense Forces, Magshimim
- **Education:** High school; physics and computer science, IASA - Israeli Arts and Science Academy
- **Known for:** Co-founded Seal Security with Lev Pachmanov and Alon Navon., Co-presented honeypot research at Black Hat USA 2015 and 32C3., Co-authored the MIT-licensed MTPot Telnet honeypot.

## Career timeline

- **2010-2015** — Technological researcher in IDF Unit 8200.
- **2015-2018** — Senior developer and later head of research at Cymmetria.
- **2015** — Co-presented Breaking Honeypots for Fun and Profit at Black Hat USA and 32C3.
- **2016** — Co-authored MTPot with Dean Sysman and Imri Goldberg at Cymmetria Research.
- **2018-2020** — Senior researcher and research team lead at Cyber Company Inc., per public career record.
- **2020-2022** — Freelance researcher for Gilgamesh Cyber Solutions Ltd.
- **2022** — Began Seal Security with Lev Pachmanov and Alon Navon; public career record dates CEO role to November.
- **2024** — Seal emerged from stealth with a $7.4 million seed round.
- **2025** — Seal announced a $13 million Series A on July 29.

## Achievements

- Co-founded Seal Security with Lev Pachmanov and Alon Navon.
- Co-presented honeypot research at Black Hat USA 2015 and 32C3.
- Co-authored the MIT-licensed MTPot Telnet honeypot.
- Received the Makor Hayim award for contributions to a critical project during military service, according to his public career record.
- Led Seal during its $7.4 million seed funding announcement and $13 million Series A.

## Latest updates

- **2026-10** — Published an October 15 essay arguing that AI-assisted repair must keep pace with AI-driven vulnerability discovery.
- **2026-03** — Published When latest stops being greatest on March 31, advocating version pinning and deliberate dependency updates.
- **2025-07** — Seal Security announced a $13 million Series A led by Vertex Israel.
- **2025-03** — Announced Seal’s entry into Snyk’s Technology Alliance Partner Program.

## Links

- Website: https://www.seal.security/
- LinkedIn: https://www.linkedin.com/in/itamarsher/
- Twitter/X: https://twitter.com/itamar_sher
- GitHub: https://github.com/itamarsher

---

Profile page: https://yespress.io/itamar-sher
Published by YesPress — https://yespress.io
Last updated: 2026-10-26