Valero Energy Corporation has committed to a corporate simulation project initially consisting of twenty-nine dynamic unit simulations. The program includes simulator / console training for Foxboro, Honeywell Experion / TDC 3000, and Yokogawa systems. As an extension of this program, Valero has embarked on a path intended to systematically address the problem of knowledge loss. In parallel to the simulator program, Valero is standardizing its operator, maintenance and craft training activities and taking additional steps to maintain subject matter expertise, capture institutional knowledge, and mentor the next generation. This paper will describe some of Valero's initiatives, and discuss the technical and commercial benefits obtained.