Retrofit Services Assesment of Energy Related Systems for Buildings and Facilities Chilled Water System Redesign with Energy Efficient Chillers Redesign of HVAC Ducting System, Supply, Installation, and Commissioning Redesign of Lighting System with Energy Cost Optimization, Lighting Quality Enhancement by Improving Color Reduction Index (CRI) and Melanopic Light Glazing System Improvement by Selective Optimization and Building Envelope Modeling Chiller Plant Management Optimization Building Operating Plan and Sequence of Operation Optimization Building Control System Programming for Occupant’s Comfort Enhancement through Lighting and Thermal Comfort Potable Water System Optimization with Water Efficiency Fixtures and Water Savings Fixtures Design Contract Administration and Commissioning of Greywater and Black Water Treatment Plant