Geo. H. Wilson is an employee-owned business that evolved through hard work and dedication from the original partnership of Izant and Wilson, established in 1921. The founder, George H. Wilson, devoted all his energies towards developing a successful business with a reputation for quality work.

The company has grown over the years to a point that it consistently employs over 85 employees. It prides itself on its role in the building trades and overall community. Geo. H. Wilson is the first plumbing company to become a Certified Green Business in Santa Cruz County and have repeatedly been recognized for our role as a bicycle friendly organization and supporter of a wide range of community organizations and events.

Geo. H. Wilson evolved from its roots to become the present multi-dimensional mechanical construction company in business today. In 2018, GHW was acquired by ACCO Engineered Systems, thus becoming part of the largest mechanical and plumbing contractor in the Western United States. The acquisition afforded GHW and its customers access to even broader capabilities across the company’s products and services.

Obtaining Green certification in Dec. 2005, and then recertification in June 2009, was a natural extension of practices previously in place with our operation. We recognize that resources should not be wasted and that recycling construction by-products is an important part of our company’s culture as we strive to always do the right thing.

Our employees provide quality service while using proven equipment and products for improving plumbing and heating infrastructures to schools, hospitals, institutions and homes throughout the Monterey Bay area. We welcome the challenge of being a community leader with best practices and new design innovations.

In 1984, Richard J. Wilson (Blue), George H. Wilson’s grandson, joined the firm. He brought a wide spectrum of engineering experience from University Mechanical in Southern California. In 1996 he became President. His stewardship has been steady throughout several business cycles.

Thomas E. Wilson, Blue’s brother and also Geo. H. Wilson’s grandson,  joined the firm as a Vice President in 1985 after a career in Radio Frequency Identification. His work at a start-up electronics company has provided a variety of experiences that have been applied to daily operations.

The Geo. H. Wilson Team is comprised of a diverse group of talented people that strive for sustainable growth through quality service and workmanship.

George H. Wilson, founder, at 94.
Izant and Wilson and its fleet of trucks in the early 1930s.
The Wilsons next to the company e-car.

Historical List of Contracts


Boulder Creek Elementary School
Cabrillo Community College
California State University Monterey Bay
DeLaveaga Elementary School
Harbor High School
Hartnell College
Monterey Peninsula College
Naval Postgraduate School:
New Brighton Middle School
San Jose State University
San Lorenzo Valley Junior High School
Santa Cruz Gardens Elementary School
Santa Cruz High School
University of California at Santa Cruz
Watsonville/Aptos Adult School Annex
Watsonville High School


Buena Vista Landfill
Emergency Family Shelter
Live Oak Library
Monterey County Office of Education
Monterey Regional Waste Management District
Santa Cruz County – Rountree Med. Security
Santa Cruz County – Simpkins Pool Cogen
Santa Cruz Port District
Sleepy Hollow Steelhead Rearing Facility
Watsonville Civic Plaza
Veterans Affairs


Cisco Systems
Monterey Mushrooms, Inc.
Monterey Pacific Winery


Cooper House
Household Credit Services
1550 Leigh Avenue
McGraw-Hill Companies
1200 Pacific Avenue


Falcon Trading Company, Inc.
Gayle’s Bakery
Hank’s at the Hook


Animal Hospital of Soquel
Community Hospital of the Monterey Peninsula
Dominican Hospital
Dominican Oaks
Garden Hotel Watsonville
Hyatt Regency Monterey
Monterey Peninsula Country Club
Monterey Plaza Hotel
Mount Hermon Association, Inc.
Quail Lodge Resort
Redwood Commons
Santa Clara Valley Medical Center
Sutter Maternity and Surgery Center
Veterans Administration Palo Alto

250 Harvey West Blvd. Santa Cruz CA 95060 • (831) 423-9522
FAX (831) 423-9903
© 2023 Geo. H. Wilson
Contractors Lic# 1042403