Knowledge of the principles, methods, and tools employed in the general operation of engines, pumps, valves, motors, and related equipment; general maintenance work; safe work practices; principles and methods of biological and chemical sewage analyses, effects and problems of industrial waste in water/wastewater treatment processes, principles of supervision. 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.