Operations Assissistant. ACS is a growing office in Hummelstown, PA. We are looking for an Operations Assistant with. Credentialing as the main focus. If you want to work within an up-and-coming company, we are the place for you. Responsibilities of. Operations Assissistant. . Interdepartmental team member supporting the Operations and Recruiting Teams: assist with the follow-up and completion of contractor's paperwork, phone calls, and data entr...