John joined Calista Technologies based on seeing enterprises struggle with the challenges of efficiently managing physical IT resources while responding to ever increasing business requirements. John has over 25 years of enterprise technology industry experience. In his most recent operating role, John was President and CEO of Rainfinity. Rainfinity is now a key technology in the EMC’s server (VMWare) and storage virtualization strategy. In addition to Rainfinity previous positions include Senior Vice President of SQRIBE Technologies; Open Systems General Manager at Compuware and General Manager of DB2 Products at Candle Corp. John has a BS in computer science from Southern Illinois University.