If you try, energy and money will bleed away while valuable efficiency improvements wait to be made. Spread the work effectively. In a big facility, your main job is to decide which Measures to accomplish, and to make sure that they get done correctly. Use engineers, architects, contractors, specialized consultants, along with the facility staff. As your program gains momentum, you will have your hands full making sure that others do their work correctly.
Many Measures straddle the boundaries of the established design and construction disciplines.
For example, successful daylighting requires close coordination between the architect, the lighting designer, the electrical engineer, and the mechanical engineer. You have to bring all these people together and require them to address all the issues that are critical for success. This is not always easy. Select your people for their willingness to listen and learn. The most important point is to get started.