Every successful Retro-Commissioning (retro-cx) project and program includes collaboration with the building’s operating staff. It is critical to foster a culture of trust and engagement with all parties in order to identify, implement, and sustain energy conservation and GHG reduction measures. Drawing on technical examples and lessons learned from real world projects, this session will provide guidance and best practices for working with an onsite operations team as part of the retro-cx process. This session will also help attendees develop training materials that can be used for ongoing cx projects, and showcase examples of how previous award-winning project collaborations have shown significant benefits beyond the attainment of energy and carbon savings.