Blue Oak Energy is an American full-service photovoltaic system design, engineering and consulting firm. The company engineers and commercial and utility solar photovoltaic (PV) energy systems in the United States and abroad. The company engineered and constructed the Google campus in Mountain View, California, the San Francisco International Airport, and the 37MW Long Island Solar Farm, and has designed solar installations for Whole Foods, Staples, Walmart, the US Navy, and the State of California.