 At an early stage in his career Sill rose through the ranks to become the General Manager of EIS and managed the internal merger and integration of Exxon Corporation's three high technology divisions, Qwip, QYX, and VYDEC in San Francisco.He then served as Vice President of Visual Engineering, a 3D graphics software company, founding management team member of Berkeley-based Ingres, a commercially supported, open-source relational database management system.In 1984 Sill founded GenevaGroup International, Inc., later becoming Chairman in 1997.