Process Engineering (also Process Development) is the backbone of almost all manufacturing industries. As it serves such a variety of needs, there is no "standard" for a Department. Chemicals, pharmaceuticals, personal care, (and on and on) all handle process engineering differently. Highly regulated industries, like pharmaceuticals, would be the most likely to have a defined structure, but that would also vary from company to company. I have two suggestions:
 
1. Obtain a "big picture" of how Process Engineering fits into the overall Process Development scheme (click here to read Beyond Process Design: The Emergence of a Process Development Focus ), and;
2. Network with the AIChE Process Development Division to gain individual "nuggets" of best practices which would best fit into the company's culture.