Engineering for
public facilities.
Helping agencies and prime contractors modernize the buildings their communities depend on. Integrated engineering, grounded in education and transit experience.
Download capabilitiesOne team.
Connected disciplines.
We bring mechanical, electrical, plumbing, fire protection, and civil engineering together with in-house architectural and structural support. Our experience as a prime A/E consultant helps us coordinate the technical requirements of complex facility projects.
From HVAC modernization on occupied campuses to power infrastructure at active transit facilities, we design around existing conditions, operational needs, and the next stage of a facility’s life.
Explore our expertise ↗Experience that
fits the assignment.
Our work for the Los Angeles Community College District, Los Angeles Unified School District, and Omnitrans spans energy assessment, building modernization, and transit electrification.
Los Angeles Pierce College
Sustainability & Decarbonization AssessmentCampus-wide boiler, chiller and HVAC evaluations, electrification feasibility, phased modernization, and decarbonization cost estimates.
White Middle School
CalSHAPE Ventilation AssessmentVentilation assessment of 154 HVAC units, including site surveys, engineering calculations, testing and balancing oversight, district coordination, and 222 filter replacements.
Corona Avenue Elementary School
HVAC ModernizationPrime design consultant for feasibility, multidisciplinary engineering, and construction administration for replacement of over 50 HVAC units on an occupied campus.
Omnitrans, Electric Bus Charging
East & West Valley Charging Station InstallationsElectrical design and power distribution infrastructure for heavy-duty electric vehicle charging stations supporting zero-emission transit fleet operations.
Contractor information.
Request qualifications ↗Registration details as of October 2026.
SAM registration
- Registration status
- Active · All Awards
- Initial registration
- April 3, 2009
- Renewal date
- December 17, 2026
- Primary NAICS
- 541330 · Engineering Services
Business details
- Legal business name
- S Y Lee Associates, Inc.
- Entity structure
- California S corporation
- Headquarters
- 216 S Jackson St, Suite 101
Glendale, CA 91205-1191
NAICS classifications.
Engineering Services is our primary classification, supported by additional registered codes.
Engineering Services
Commercial and Institutional
Building Construction
Architectural Services
New Multifamily Housing Construction
(except For-Sale Builders)
Business certifications.
Program designations
- DBE
- Disadvantaged Business Enterprise
- MBE
- Minority Business Enterprise
- SBE
- Small Business Enterprise
- CBE
- Community Business Enterprise
A minority-owned practice.
S Y Lee Associates is an Asian-Pacific American owned engineering firm, led by founding President Sang Y. Lee.
For a qualifications package or teaming opportunity, contact us for current certificates and documentation relevant to your agency’s requirements.
Request certification documents ↗Western roots.
Pacific reach.
Professional registrations across nine states and territories support our work beyond our Southern California base.
- Arizona
- California
- Colorado
- Guam
- Hawaii
- Louisiana
- Nevada
- Oregon
- Washington
Planning your
next project.
How can S Y Lee support our project team?
We provide individual engineering disciplines and coordinated multidisciplinary design. Our experience includes prime A/E consulting, existing-system assessments, construction documents, and construction administration. Share your scope so we can discuss the right role for our team.
Do you work in occupied facilities?
Yes. Our school modernization and transit projects include occupied campuses and active operations facilities. Existing-system evaluations and coordination with the project team help shape practical replacement and modernization plans.
How do you coordinate design documentation?
We prepare construction documents in Revit MEP and AutoCAD, with dedicated tools for load calculations, system modeling, and Title 24 analysis. In-house architectural and structural support helps align building systems with equipment loads and spatial requirements.
What should we include in a project inquiry?
Please include the project location, facility type, engineering scope, and anticipated schedule. For solicitations and teaming opportunities, include the solicitation number and response deadline. Reach our team at sangl@sylinc.com or 818.242.2800.
Let’s discuss
the assignment.
Connect with our team about an upcoming solicitation, qualifications request, or engineering partnership.
Contact our teamSang Y. Lee
President
William Lee
Director of Project Administration
sangl@sylinc.com ↗818.242.2800 ↗Download capability statement ↓