Denis Vacher is the PI Server team lead overseeing all development for OSIsoft flagship product. Before joining OSIsoft in 2001, Denis worked as a software developer for nine years, primarily in the RDBMS field. At OSIsoft, he was part of the development team for the PI Server 3.4, and became the main architect for PI Server Replication and High Availability. Denis holds an M.S. degree in Computer Science from the SupInfo Engineering School in Paris, France.