Members by Company

OAC Services, Inc.

Architects, engineers, and construction management. AGC member since 2009.
Phone: (206) 285-4300
Fax: (206) 285-4370
701 Dexter Ave. N, Ste. 301
Seattle, WA  98109

O'Brien Construction Co., Inc.

AGC member since 2007.
Phone: (509) 582-5525
Toll Free: (800) 541-5114
Fax: (509) 736-2359
501 N Quay, Ste. C 101
Kennewick, WA  99336

Oldcastle Precast, Inc.

Precast concrete products: three-sided bridges, barrier, utility vaults: electrical, water, communication, and environmental, drainage manholes, pipe, and catch basins. structural/architectural precast. AGC member since 1966.;
Toll Free: (800) 892-1538
Fax: (253) 735-4201
2808 "A" St. SE
Auburn, WA  98002

Oles Morrison Rinker & Baker LLP

Washington's most experienced law firm in all facets of construction - contracts, bonding, insurance, partnering, claims, bid protests, environmental, MBE/WBE and labor. AGC member since 1979.
Phone: (206) 623-3427
Fax: (206) 682-6234
701 Pike St., Ste. 1700
Seattle, WA  98101

Olson Bros. Excavating, Inc.

Earthwork and underground utilities, excavation, site development, sewer, storm, water, residential subdivisions, and demolition. AGC member since 1988.
Phone: (253) 770-3844
Fax: (253) 770-3845
6622 - 112th St. E
Puyallup, WA  98373

Olympic Peninsula Construction, Inc.

AGC member since 2018.
Phone: (360) 626-1963
Fax: (360) 824-8730
Street Address
42 Ketch Lane
Poulsbo, WA  98365
Mailing Address
P.O. Box 553
Poulsbo, WA  98365

Omega Riggers & Erectors INC.

Omega Riggers & Erectors, Inc. is a highly developed machinery moving and rigging contractor specializing in full service equipment installation worldwide. As the Seattle Metro area’s top millwright and machinery moving company, we are proud to be your first choice in machinery and equipment moving. Member since 2017. Storage – Indoor storage 100' x 300' fully insulated and temperature-controlled building. Building is equipped with a 24-hour video surveillance and sprinkler systems throughout and a twenty-ton overhead crane. Outdoor storage is also available for all other storage needs. Fabrication – Custom fabrication services and custom welding services available. AGC member since 2017.
Phone: (253) 804-6000
Fax: (253) 804-4000
3705 W Valley Hwy. N
Auburn, WA  98001


OMEGA MORGAN is the Pacific Northwest’s Premier Solutions provider to meet your Crane, Rigging, Transportation and Millwright service needs. Based regionally in the PNW our reach extends globally. We service our customer’s machinery moving, transportation and re-location needs both domestically and internationally. Our Millwright Services group has a complete machining and fabrication shop ready to meet your needs. Our Engineering group has long been recognized for innovate solutions to complex transportation and rigging challenges. We have both inside and outside secured storage with video surveillance and controlled access. Omega Morgan provides complete crane service, machinery moving, rigging and transportation services. AGC member since 2012.
Phone: (253) 852-7500
Fax: (253) 852-7600
1222 - 46th Ave. E
Fife, WA  98424

On Site Health & Safety

ON-SITE HEALTH & SAFETY is a 24-hour provider of essential health and safety services. Certain services can be better performed at the jobsite, instead of an off-site facility. AGC member since 2016.
Phone: (866) 998-2750
520 - 6th St.
Rodeo, CA  94572

O'Neill Service Group, LLC

Transportation QA/QC design-build, special inspections and construction materials testing, and environmental services. AGC member since 2012.

Phone: (425) 429-7800
Fax: (425) 633-2284
17619 NE 67th Court, Ste. 100
Redmond, WA  98052

Osborne Construction Company

Focuses on commercial, industrial, military, civil, housing, and design/build projects for government agencies and private clients. AGC member since 2006.
Phone: (425) 827-4221
Fax: (425) 828-4314
Street Address
10602 NE 38th Place, Ste. 100, Quad One South Bldg.
Kirkland, WA  98033
Mailing Address
P.O. Box 97010
Kirkland, WA  98083

Otto Rosenau & Associates, Inc.

WBE certified small business: geotechnical engineering, ground penetrating radar (locating), WABO certified special inspection/testing - concrete, masonry, steel, fireproofing, soil, asphalt, etc. AGC member since 1982.


Phone: (206) 725-4600
Toll Free: (888) 688-6487
Fax: (206) 723-2221
6747 Martin Luther King Jr. Way S
Seattle, WA  98118

Overton Safety Training, Inc.

Safety training for equipment operators. AGC member since 2006.
Phone: (503) 356-0403
Toll Free: (866) 531-0403
Mailing Address
P.O. Box 6297
Aloha, OR  97007