Donald Greene has worked at the physician-led subspeciality pathology group Sagis Diagnostics in Chicago, Illinois, since 2023. The business provides physicians, hospitals, physician groups, and ambulatory surgery centers with diagnostic and testing pathology services through a team of board-certified pathologists supported by a College of American Pathologists-accredited histology lab. A senior territory manager at Sagis Diagnostics in Chicago, Donald Greene directs and oversees accounting operations at the company.

Mr. Greene collaborates with other departments and communicates with vendors in this capacity, and his responsibilities range from assisting with budget processes and preparing cash-disbursement approvals to overseeing accounts payable processes and annual, quarterly, and monthly accounting close reporting. He also implements accounting policies and procedures and conducts accounting staff trainings to maintain compliance with financial and government regulations, as well as GAAP and IFRS standards.

In addition to his role at Sagis Diagnostics, Donald Greene is the cofounder of the sales-focused information services tool NPI Scope. He also attends national meetings of professional organizations like the American Podiatric Medical Association and the American Association of Oral and Maxillofacial Surgeons.