Do you have a valid Class B Commercial Learner's Permit (CLP) with general knowledge, air brakes, and passenger endorsements OR have the ability to obtain a valid Class B Commercial Driver's License (CDL) with general knowledge, air brakes, and passenger endorsements, within 120 days of hire, independently or through the MBTA's sponsored training program?. Ability to work all shifts and / or locations assigned, directed, or necessary for this position, including (for some transit / operations roles) up to twenty-four (24) hours per day, seven (7) days per week as necessary to accommodate severe weather conditions, emergencies, or any other circumstances that may potentially impact service or the safety of service.