Job Duties. 1. A typical work week will consist of checking cathodic systems or installing new systems from Monday to Thursday (see numbers 2, 3, and 4 below for more information). Friday is usually a shop day preparing for next week’s work (number 7 below) or local work near home base. 2. The CPT must be willing to travel almost every workday (and stay overnight in hotels anywhere from approximately 80 to 100 nights per year, depending on worklo...