Daniel Chechik is a senior security researcher at Trustwave's SpiderLabs. He has spoken at the BlackHat conference, holds CEH and CCSE certificates and has a patent pending for 'Detecting Malware Communication on an Infected Computing Device'.
Romain Gaucher is security researcher and the author of Grabber (web application scanner), Scalp, BlackSheep, and PHP-AST/Oracle source code manipulation framework & analyzer. In his previous life, he enjoyed science and tortured unsupervised clustering using optimization meta-heuristics, also spent some time on automated conjecture generation and proving at GERAD.
ksoona is the creator of Attack Vector Linux, a pentesting Linux distro based on Kali and TAILS.
Robert David Graham a.k.a ErrataRob (twitter handle) is a security researcher who is an active contributor to Errata Security and the creator of BlackICE Guard IPS, isowall and masscan. BlackICE Guard was the first IPS which is now sold as the IBM Proventia G. He has spoken at hacker conventions like Blackat, Shmoocon and DEFCON.
Christian Frichot is an Information Security Professional from Perth, Australia who has contributed to the Beef Project and a co-author of "The Browser Hacker's Handbook". He has a deep love/hate relationship with web browsers and JavaScript. Christian has presented at numerous Australian security conferences, including OWASP AppSec APAC, the Australian Information Security Association's Perth Con, ISACA's Perth Con, OWASP Melbourne, and Ruxmon. He has been involved with OWASP's SAMM Self Assessment Tool, Prenus (the pretty Nessus thing), Burpdot (graphing connectivity between URLs from Burp), and the Devise Google Authenticator extension.
Wade Alcorn is the author of the BeEF open source browser exploitation framework and he has published technical papers on emerging threats and was awarded the AusCERT national "Award for Individual Excellence in the field of IT Security" in 2011.
Luke Sampson is a developer who is known for developing "Scoop", a command-line installer for windows.
shipcod3 is an application security professional and former bug bounty hunter who has been acknowledged by Facebook, Freelancer.com, Microsoft, Adobe, Yahoo, etc. He has contributed exploit and auxiliary modules for the Metasploit Framework and a speaker at hacking conferences like DEFCON, HITCON, Nullcon, ROOTCON, etc
Daniel Miessler is an infosec professional who is the former Principal Security Architect at HP Fortify on Demand and currently the a Director at IOActive. He is known for writing a good intro to tcpdump and is an OWASP Project leader. He can always be seen in DEF CON and you can say hi to him because he is a good guy
Andrew Komarov is the CEO of the Los Angeles-based cyber-threat intelligence company IntelCrawler. Some of his noteworthy research in this role involves point-of-sale (POS) malware, such as ‘Nemanja,' which infected more than 1,500 POS devices and compromised as many as half a million payment cards, and JackPOS, which resulted in more than 4,500 payment cards being compromised by 11 infections across the U.S. and Canada. Prior to IntelCrawler, Komarov worked in the private and public sectors where he investigated major financial crimes, human and drug trafficking cases, and was involved in anti-terrorism cooperation with international law enforcement agencies.