Lilker Energy Solutions (LES) provided energy modeling services for three buildings on the campus of the KAUST Research Park. The buildings are an administrative building, a maintenance and services building and a Mosque. The administrative building is an approximately 84,000 sq. ft. structure which includes offices and conference rooms as well as a kitchen and dining area. The Maintenance and Services building is an approximately 46,000 sq. ft. structure which includes offices, maintenance space and workshops as well as a data center. The Mosque building is an approximately 10,000 sq. ft. structure which includes religious worship space. Each building has been designed according to the principles of energy efficiency and sustainability in order to meet the requirements for certification under the U.S. Green Building Council’s Leadership in Energy and Environmental Design (LEED) 2009 rating system. By utilizing efficient lighting, increased levels of wall insulation, efficient glazing, and energy recovery wheels the administrative building was able to demonstrate a 22.3% energy cost savings compared to a similar building designed to ASHRAE 90.1 minimum specifications. The Mosque and Maintenance and Services buildings were able to demonstrate 26.1% and 22.8% energy cost savings, respectively.