Engineering services, namely, electrical engineering, mechanical engineering, plumbing engineering, and engineering for building commissioning; Engineering consulting services in the field of retro and on-going building commissioning; Technology consultation in the field of electrical engineering, mechanical engineering, plumbing engineering, and engineering for building commissioning; Technology consultation in the field of energy efficiency improvements for buildings in the nature of lighting, heating, cooling, natural ventilation, fuel cells, water conservation, environmental control systems, and industrial processes and equipment Design services in the field of green technologies building design for residential, office, commercial and industrial buildings; Engineering services in the field of energy efficiency; Consulting services related to the design of energy efficient and sustainable buildings