The responsibilities of a swimming pool installer include the building and repair of residential and commercial pools. The size and construction method vary from customer to customer, but a contractor who specializes in swimming pools most often works on inground pools. As a pool installer, you may help the client select a location for their pool, dig a hole, and create a frame. You then use materials specified by the client to build the structure itself. You may also install equipment such as pumps, heaters, and filters.