Pool maintenance technicians specialize in installing, servicing, and repairing swimming pool equipment. They are also responsible for visiting a client's pool facilities to perform routine preventative maintenance tasks, including testing the water chemistry to ensure there's an appropriate balance of chlorine and pH levels, cleaning out the filtration system, and inspecting pool equipment and structure to keep it in working condition. Swimming pool techs advise clients on any repair work or water quality issues they identify. They typically work full-time and use a company vehicle to visit clients.