A cable jointer is a professional who works with heavy insulated cables such as telephone, high-voltage and fibre optic cables. The job requires electrical expertise as well as substantial on-the-job training.
One of the main jobs that a cable jointer does is create splices, or joints, in runs of cable by connecting two or more cables together. The jointer then connects the insulation and/or sheathing that surrounds the cable.
Cable jointers are also charged with maintaining and repairing existing runs of cable. They also perform tests and checks of conductors and insulators, locating and repairing faults. Jointers will often assist in digging trenches and ditches for runs of underground cable.
In addition to knowledge of electricity and conductivity, cable jointers need to be comfortable working outside in all conditions and need to be comfortable with heights. Cable jointers also need to be able to work as part of a team.