The Massachusetts Bay Transportation Authority is soliciting Consultant Teams to perform Owner Project Manager (OPM) Services for complex capital projects using Construction Management at Risk services under MGL Ch. 149A to provide several administrative and technical support services including but not limited to: Assistance, preparation, and review of items during selection process; Leadership, assistance, and review of Preconstruction and Construction activities; Review and advice on Commissioning and Closeout Phase activities; and other related OPM services to be determined during task order development.