Accounts Receivable Specialist. Sahr has an immediate opening for an Accounts Receivable Specialist. Sahr, with locations in Grand Rapids, Kalamazoo, and Lansing, is a leading supplier of windows, doors, and hardware for both commercial and residential construction projects in Michigan and surrounding states in the Midwest. This position will require occasional travel to all the Sahr locations. Responsibilities. Prepare all daily, weekly, and mon...