Ron Gula - Chief Executive Officer and Chief Technical Officer
Mr. Gula is known in the global security community as a visionary, innovator, and engineer of extraordinary talent. He traces his passion for his work in security to starting his career in information security at the National Security Agency conducting penetration tests of government networks and performing advanced vulnerability research.

Since co-founding Tenable in 2002, Mr. Gula has been CEO and CTO at Tenable, maker of the world renowned Nessus Vulnerability Scanner and Unified Security Monitoring enterprise solution. As CEO/CTO of Tenable, he is responsible for product strategy, research and development, and product design and development. Mr. Gula is also a leader in his community and a passionate advocate for education and scientific research.

Prior to Tenable, Mr. Gula was the original author of the Dragon IDS and CTO of Network Security Wizards which was acquired by Enterasys Networks. At Enterasys, Mr. Gula was Vice President of IDS Products and worked with many top financial, government, security service providers and commercial companies to help deploy and monitor large IDS installations. Mr. Gula was also the Director of Risk Mitigation for US Internetworking and was responsible for intrusion detection and vulnerability detection for one of the first application service providers. Mr. Gula worked for BBN and GTE Internetworking where he conducted security assessments as a consultant, helped to develop one of the first commercial network honeypots and helped develop security policies for large carrier-class networks. Mr. Gula began his career in information security while working at the National Security Agency.

Mr. Gula has a BS from Clarkson University and an MSEE from the University of Southern Illinois. Ron Gula was the recipient of the 2004 Techno Security Conference "Industry Professional of the Year" award. In SC Magazine's 20th Anniversary Edition, he was named as one of the top market entrepreneurs for the past 20 years.

Jack Huffard - President and Chief Operating Officer
Since co-founding Tenable in 2002, Jack Huffard has been COO at Tenable, maker of the world renowned Nessus Vulnerability Scanner and Unified Security Monitoring enterprise solution. At Tenable, Jack is responsible for driving corporate strategy, business development, marketing, sales, and finance.

Prior to Tenable, Mr. Huffard was the Director of Corporate Development for Enterasys Networks/(f.k.a. Cabletron Systems) where he was responsible for the development of investments and acquisitions in the security market for Enterasys. Mr. Huffard worked on the acquisitions of Network Security Wizards (developer of the Dragon IDS) and Indus River Networks during his time at Enterasys. Mr. Huffard worked closely with Mr. Gula on development of corporate strategy for addressing the network security market needs. Prior to Enterasys, Mr. Huffard gained experiences working for HarbourVest Partners, LLC and Microsoft Corporation. Prior to HarbourVest and Microsoft, Mr. Huffard held various management and sales positions at John Hancock and Marriott Corporation.

Mr. Huffard has a BS from Washington and Lee University and a MBA from Babson College.

Renaud Deraison - Chief Research Officer
Mr. Deraison is known in the global security community as the father of the Nessus Vulnerability Scanner. His original creation, Nessus, celebrated its 10th anniversary in 2008 and is considered the defacto standard for vulnerability scanning worldwide.

Since co-founding Tenable in 2002, Mr. Deraison has been Chief Research Officer at Tenable, maker of the world renowned Nessus Vulnerability Scanner and Unified Security Monitoring enterprise solution. At Tenable, Renaud is responsible for driving all vulnerability, configuration, and event and log research. In addition, Renaud is instrumental in the design of Tenable's Unified Security Monitoring enterprise solution.

Prior to Tenable, Mr. Deraison was the primary author and visionary of the Nessus vulnerability scanner. Mr. Deraison released the first version of Nessus in the spring of 1998 at the ripe age of 17. He worked for SolSoft, and founded his own computing security consulting company, "Nessus Consulting S.A.R.L.". Under Renaud's leadership, Nessus has won numerous awards, including the 2002 Network Computing "Well Connected" award and PC Magazine's 2003 "Open Source Product of the Year" award. Mr. Deraison also is an editorial board member of the Common Vulnerabilities and Exposures Organization, has presented at a variety of security conferences including Blackhat and CanSecWest, and has had his work published in several magazines and books.

Marcus Ranum – Chief Security Officer
Marcus J. Ranum is a world-renowned expert on security system design and implementation. He is recognized as the inventor of the proxy firewall, and the implementer of the first commercial firewall product. Since the late 1980's, he has designed a number of groundbreaking security products including the DEC SEAL, the TIS firewall toolkit, the Gauntlet firewall, and NFR's Network Flight Recorder intrusion detection system. He has been involved in every level of operations of a security product business, from developer, to founder and CEO of NFR. In SC Magazine's 20th Anniversary Edition, Mr. Ranum was named as one of the top industry pioneers over the last 20 years.

Since joining Tenable in 2004, Mr. Ranum has been Chief Security Officer at Tenable, maker of the world renowned Nessus Vulnerability Scanner and Unified Security Monitoring enterprise solution. At Tenable, Mr. Ranum is responsible for research in logging tools, product training and product/best practice evangelism. In addition, Marcus is instrumental in the design of Tenable's Unified Security Monitoring enterprise solution.

Prior to Tenable, Mr. Ranum had served as a consultant to many FORTUNE 500 firms and national governments, as well as serving as a guest lecturer and instructor at numerous high-tech conferences. In 2001, he was awarded the TISC "Clue" award for service to the security community, and the ISSA Lifetime Achievement Award. Mr. Ranum was most recently senior scientist at Trusecure Corp., an international risk management firm. He serves as a technology advisor to a number of start-ups, established concerns and venture capital groups.