- Ramanujan IT City implemented an Energy Management System (EnMS) certified to ISO 50001 to reduce energy costs and emissions. - Power costs accounted for 78% of operating costs, so EnMS focused on improving energy efficiency. - The implementation journey included establishing an energy policy, reviewing energy use, setting objectives and action plans, and integrating EnMS into the existing integrated management system. - Early achievements included benchmarking energy parameters, improving HVAC performance, clarifying roles and responsibilities, and gaining a sales advantage through the focus on energy management.