At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good. Knowledge of the methods, materials, equipment, and tools used in the construction, repair, and operation of engines, pumps, and other mechanical equipment related to water/wastewater treatment plant operations and procedures; safe work practices.