CRNA Positions at UPMC Williamsport, Surgical Services Available. Flexible 8, 10, 12 and 24-hour shifts available. Also, special two-week schedule of 72-hour weekend shift every other weekend. 7A Friday to 7A Monday. On 3 days / Off 11 days available. Sign-On Bonuses and incentive Packages Available. Service Cases: Cardiac, Plastics, Thoracic, Vascular, Trauma, Pediatrics, Orthopedics.