Hydroelectric power generation has been around since the late 19th century. Generally seen as a renewable, environment friendly, non-polluting, low-cost and highly reliable source of energy, some 150 nations have hydel-power projects today. Hundreds of hydro-generators installed more than 60 to 80 years ago still operate across the world, using old technology. Given the long-time cycle and huge capital investment required to construct a new power plant, upgrading these old hydro units by Renovation, Modernization and Uprating (RMU) is a quick, cost effective means of capacity addition. This white paper showcases the capabilities of Quest Global in Engineering Services for RMU of Hydro Generators. This method is also applicable to old steam and gas based power stations.