Wang & Lee Group is a Hong Kong-based electrical and mechanical (E&M) engineering contractor. Operating through its primary subsidiary, Wang & Lee Contracting, the company installs and maintains building systems — including low voltage electrical systems, mechanical ventilation and air-conditioning (MVAC), fire services, and plumbing — for commercial, industrial, and residential properties across Hong Kong. Wang & Lee wins work through competitive tender, securing roughly a third to 40% of bids it submits, and serves customers including property developers, commercial building owners, hotel and hospital operators, and the Hong Kong government. The company acts as prime contractor on roughly half to two-thirds of its projects, subcontracting out the majority of physical work while retaining project management and quality oversight. Revenue is recognized on a fixed unit price basis and is driven by the number and size of projects won. Customer concentration is high, with the top five customers historically accounting for 88–98% of annual revenue. Wang & Lee also holds authorized dealer status for an American HVAC brand, giving it preferential equipment pricing that supports margins on MVAC bids. In early 2025, Wang & Lee acquired Solar HK, a solar photovoltaic installation and green energy services firm, marking its entry into renewable energy. The company is also shifting toward pure project management on larger jobs to reduce direct costs and improve cash flow.