Guido Appenzeller is currently the CTO Cloud & Networking at VMware. Before VMware he co-founded Big Switch Networks and led the company for 4 years as CEO. Previously Guido founded and was CTO at Voltage Security (acquired by HP) and helped grow it to profitability and over 1,000 Enterprise Customers. From 2008 to 2010 Guido was a Consulting Assistant Professor at Stanford University where he led team that developed the OpenFlow standard. Guido was named a top Technology Leader on the MIT TR35, a Technology Pioneer by the World Economic Forum and one of the 100 Most Intriguing Entrepreneurs by Goldman Sachs. He holds a Ph.D. from Stanford University and M.S. (Diploma) from the Karlsruhe Institute of Technology.