Connected expertise.
Lasting commitment.

The whole building.
From the beginning.

Building systems work best when they are designed together. We connect core engineering disciplines with in-house architectural and structural support, bringing a coordinated perspective to new construction and renovation.

Our work ranges from HVAC and central plants to power distribution, fire safety, and building energy analysis. Education, transit, commercial, and mixed-use projects bring different challenges; we approach each with attention to the building and the people who rely on it.

S Y Lee Associates, Inc. continues an engineering legacy dating back to 1954 through its predecessor firms, with direct professional continuity through its President, Sang Y. Lee, P.E., who served as both an associate and a partner in those organizations.

William Lee, MBA, serves as Director of Project Management & Operations.

Based in Glendale, California, our professional registrations span Arizona, California, Colorado, Guam, Hawaii, Louisiana, Nevada, Oregon, and Washington.