Tas is a Rapid7 co-founder and CTO at Rapid7 and has been part of the Matthews and Devine team since 1990. Giakouminakis helped form Percussion Software in 1994 where he led the server development of Notrix, Percussion's first product. In addition, he led the server development team for Rhythmyx, Percussion's Enterprise Content Management system. Tas left Percussion to launch Rapid7 in 1998. Prior to his recent experiences, he worked in the financial services sector, developing software in the security and risk areas for CitiCorp.