Jobs in a hydroelectric plant involve designing, building, operating, and maintaining the systems and equipment that generates electrical energy from moving water. The duties of plant technicians and operators involve ensuring that the hydraulics and other equipment are operating efficiently and making repairs and performing maintenance when needed. As a plant manager, you oversee the operation of the power plant and delegate tasks to plant employees when required. Engineers have responsibilities related to the design of hydroelectric plants and improvements to equipment or processes within the plant. Your duties can change depending on the size and type of plant in which you work.