Design a variety of HVAC systems, including chilled and heating water systems, VRF/VRV, DX cooling, electric and gas heat, CV/VAV, DOAS, packaged systems, and other point-of-use HVAC systems. Chilled and heating water hydronic systems, VRF/VRV, DX cooling, electric and gas heat, CV/VAV, DOAS, packaged and built-up modular systems, and low- and medium-pressure duct systems.