O NELSON & SON INC operating as a corporation is licensed in California under CSLB number 307071. The license was first issued in 1975, putting the business at 51 years on the active CSLB roster. It carries a single CSLB classification: A — General Engineering Contractor. Records show an active surety bond on file with HUDSON INSURANCE COMPANY and active workers' compensation coverage from STATE COMPENSATION INSURANCE FUND. The business is based in WOODSIDE, in San Mateo County, California.