ThreatSTOP has assembled a core management team of seasoned veterans with demonstrable successes in the security, Internet and data communications industries. Many of us have worked together in the past, share the entrepreneurial ethos, and are all committed to build this Company into a great success that solves a major problem for our customers.

Tomás Byrnes

Founder and CEO

Tom Byrnes, the founder and CEO of ThreatSTOP, used his more than 25 years’ of experience to create a market-leading cloud-based network security company. ThreatSTOP delivers a highly scalable defense to deflect inbound attacks, and prevent data theft using existing security devices. More than 500 companies trust ThreatSTOP to protect their networks today.

Byrnes is a long-standing member of the global cybersecurity community. He served in the U.S. Army for 13 years, ultimately joining the seminal tactical networking group. This group was responsible for securing classified military networks deployed in highly insecure environments: the foundation of all subsequent security efforts.

In the private sector Byrnes’ work started with designing and building large-scale global networks, and ultimately providing technical advice and leadership for a number of successful startups including iPivot (acq Intel, 1999), Preventsys (acq McAfee 2006), Breach Security (acq Trustwave 2010), Netsift (acq Cisco 2005), and specifying and evangelizing security products at Radware (NASDAQ:RDWR).

Byrnes holds two patents in network security using DNS, and is credited as the inventor on two additional patent applications. An active member of the IEEE, ISSA and Infragard, Byrnes speaks regularly at conferences on the topic of security.

Ever the adventurer, Byrnes is an off-road racing enthusiast and was part of the JCR/Honda team that won seven Baja 1000 races in a row from 2007 to 2014. When not on the road securing the world or seeking the unknown, Byrnes lives in North San Diego County with his wife, two sons, and their rescue dog.


Nicko Dehaine

VP Engineering

Dehaine has over 18 years of diverse experience in engineering management, software development, internet application development, and computer networking. He has particular expertise in Unix and TCP/IP, web applications, cloud computing, and platform/software as a service (PaaS/SaaS). Before joining ThreatStop, Dehaine was Vice-President of Engineering at and Director of Software Development at Bridgepoint Education, and St. Bernard Software/Edgewave. He holds a M.S. in Computer Science from EPITA (Paris, France).


Matt Foster

VP Sales and Business Development

Foster is responsible for global customer engagements and technology partnerships with leading security vendors. An IT industry sales veteran, Foster brings to ThreatSTOP more than 20 years of experience in sales leadership, consistently growing revenue and driving successful partnerships for innovative IT security startups. Before joining ThreatSTOP, Foster was the Vice President of Sales for RedSeal Networks. Prior to RedSeal, he co-founded and served as Vice President of Sales for Blade Software. Foster previously held sales management roles at Internet Security Systems and NetManage.


Paul Mockapetris

Chief Scientist

Mockapetris is the inventor of the Domain Name System (DNS). His mission is to help guide DNS and IP addressing to the next stage. Mockapetris created DNS in the 1980s at USC’s Information Sciences Institute, and later was the Director of ISI’s High Performance Computing and Communications Division. Throughout his career, Mockapetris has contributed to the computing research community and the evolution of the Internet. His earliest work at UC Irvine on distributed systems and LAN technology preceded the commercial Ethernet and Token Ring designs. At ISI, after working on the design and initial implementation of the SMTP protocol for email as part of the birth of the Internet in 1983, he took on the challenge of designing DNS, and then operated the original “root servers” for all Internet names.


Steve Wallace

VP of Customer Experience

Steve Wallace is an entrepreneurial technologist with 30 years of hands-on experience in data security, network design, technical operations, and cloud computing.

Prior to joining ThreatSTOP, Wallace was the CTO of AIS Data Centers. He previously held senior technology leadership roles including CTO, ComplexDrive Data Centers, CTO,, and founder and VP of Engineering, American Digital Network. Wallace served in the U.S. Navy and holds a BSc in Computer Engineering from CSU Long Beach. Wallace is currently an Advisory Board Member for CyberHive - CyberTECH, and a Security SIG Co-Chair for CommNexus.


Irena Damsky

Senior Director, Security Research

Irena Damsky is a security and intelligence researcher and developer based in Israel. As Senior Director, Security Research for ThreatSTOP, she is responsible for establishing and managing a team of researchers and analysts to find, understand and publish information about active threats that is then used to protect ThreatSTOP customers and shared with the InfoSec community at large. Prior to joining ThreatSTOP, Damsky served as the Threat Intelligence Team Leader for Check Point Software. Damsky currently holds the rank of Captain in Reserve with the Israeli Intelligence Forces where she served for more than six years as a security researcher, developer and team leader. She is a frequent speaker at security events such as M3AAWG and Shmoocon. Damsky holds a BSc in Computer Science from Tel Aviv University (TAU) and an MSc in Computer Science from The Interdisciplinary Center Herzliya (IDC). She is fluent in English, Russian and Hebrew.

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