Document Control Representative The Document Control Representative collaborates directly with the department supervisor and the manufacturing department to create, maintain, and control effective work instructions and documentation in a timely manner. Vanguard EMS, Inc. is in the service business. Even with Vanguard's state of the art technology, vast manufacturing capability, and leading-edge information tools, we wake up every day thinking about how best to serve our customers, suppliers, and the communities in which we live.