Job description. Tankerman. (MUST HAVE VALID USCG TANKERMAN LICENSE). Schedule. 7 days on, 2 days off, 7 nights on, 5 days off. 12 hour shifts. Scope. Tankerman is responsible for loading/unloading diesel fuel, gasoline and oil products to/from vessels. Primary Functions and Duties. 1. Tankerman must transfer diesel fuel, gasoline and oil products to vessels from fuel flats in a safe and efficient manner. 2. Tankerman must be familiar with the ar...