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Our Clients

AT&T

AT&T Mobility

Verizon Wireless

T-Mobile

USC

Loyola Marymount College

Santa Monica-Malibu Unified School District

United States Postal Service

Community Coalition

Apprentice and Journeyman’s Trust (Plumbers and Pipefitters)

DirecTV

NBC Universal

Inner City Associates

UC Irvine

Olsen Construction is a union, MWBE General Contractor that is licensed in California, Arizona, and Nevada, and is headquartered in Monrovia, CA.

Quick Links

Warehouse & Office

Monday – Friday
6:00 AM – 5:00 PM

Administrative Office
Monday – Friday
9:00 AM – 5:00 PM

busdevelop@hcolsen.com
710 E. Los Angeles Ave
Monrovia, CA 91016
(626) 359-8900