David Holmes serves as F5’s Senior Technical Marketing Manager for Security. In this role, Holmes is a spokesperson and evangelist for F5’s security solutions. He speaks at security and network conferences such as InfoSec and Agility. Holmes authors articles for publications such as SC Magazine and white papers on security infrastructure with an emphasis on DDoS and cryptography. Since joining F5 in 2001 as a Principal Software Engineer, Holmes has helped design system and core security features of F5's Traffic Management Operating Syesterm (TMOS). Prior to joining F5, Holmes served as Vice President of Engineering at Dvorak Development and was a Senior Software Engineer at CyberSafe, Inc. With more than 20 years of experience in security and product engineering, Holmes has contributed to security-related open source software projects such as OpenSSL.