About us. GWP is hiring Underground Pipe Layer positions. This work includes installing Water, Sewer mains and services. MUST HAVE EXPERIENCE IN UNDERGROUND UTILITIES. Must be able to perform all activities associated with installing pipe, fittings, valves structures, and etc. (Irrigation experience does not meet qualification requirements). Must be able to make connections to existing pipe, work in trench box, set up lasers and in dewatering sit...