The Medical Service Corps (MSC) consists entirely of commissioned officers. Members are required to hold a bachelor's or master's degree in Healthcare, Management, Economics, Finance, Operations Research, Business Administration or similar degree before receiving a commission, and must complete a four-week orientation course at Maxwell AFB, AL, and then a five-week military Health Systems Administration (HSA) course at Fort Sam Houston, San Antonio, TX. MSCs serve as hospital administrators, resource management officers, directors of information systems/technology, managed care and patient administrators, group practice managers, medical logisticians, and medical readiness officers. MSC officers are also expected to become Board certified by one of several national healthcare administration organizations. This is usually done while the officer is in the rank of captain or Major.