Renaud Deraison is chief technology officer of Tenable. Prior to co-founding Tenable, Renaud redefined the vulnerability management market by authoring Nessus, the world's most widely deployed vulnerability scanner, with over one million downloads. Nessus has received numerous awards, including SC Magazine's 2015 five-star "Best Buy" rating, SANS Institute's Best of 2015 Award for vulnerability assessment, and Network World Asia's 2015 award for best vulnerability assessment and management product. Renaud continues to contribute to the global security community, including authoring three patents related to network scanning and security, and publishing his work in a variety of respected books and magazines. He is also a member of the editorial board for the Common Vulnerabilities and Exposures Organization. In 2013, Renaud received the Ernst and Young Entrepreneur of the Year Award for defense and security, together with Ron Gula and Jack Huffard.