RWDI

About RWDI

RWDI is a climate and performance engineering consulting firm in the Westminster area of London, Ontario. It serves clients in the civic, cultural, commercial, residential, and educational sectors. The firm works on infrastructure including airports, bridges, ports, rail and transit, roads and tunnels, waste management, manufacturing, mining and quarrying, oil and gas, renewable energy, and iconic structures. The firm provides engineering services including wind assessments, scale model testing, and computational fluid dynamics (CFD) modeling for indoor and outdoor environments. It offers services for human comfort and safety, GHG verification for climate change regulatory requirements, air quality, emissions, environmental risk management, and the design of supplementary damping systems for tall buildings. RWDI was formed in 1986 when senior partners bought out the Guelph microclimate division of Morrison Hershfield to create Rowan Williams Davies and Irwin, Inc. The company has over 50 years of experience in resilient design and environmental stewardship. As of 2025, the firm has been ranked as one of Canada’s Best Managed Companies for 17 straight years.