Conserving energy becomes part of business culture, and it describes by reducing energy consumption to achieve the same works. Due to increasing internal demand on energy in many parts of the world, it has pushed societal expectations to oil companies toward rigorously conserve energy and explores ways to enhance its energy performance. As global energy demand soars, it is known that the industries, power plants and transportation sectors are the main contributors to the intensive utilization of energy resources. The demand from the growing population has overwhelmed current capacity. It is inevitable, therefore, many oil companies are now participating in on-going efforts to conserve energy, and do so in a sustainable manner by means of implementing energy management systems (EnMS) in accordance to internationally recognized standards. However, its progress has just been seen and unfortunately, most of oil companies are far away from a matured management to excel in energy performance. It appears that many of oil companies consider EnMS as an ambition rather than a platform to excel in energy performance. In fact, cost reduction is a main focus instead of exploring other hidden benefits of EnMS. More seriously, lack of dedicated steps to push for the successful implementation. This paper discusses a systematic approach that drive for full implementation of EnMS at one of the leading oil companies.