MUELLER ENGINEERING operating as a sole owner is licensed in California under CSLB number 1078132. The license was first issued in 2021, putting the business at 5 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 AMERICAN CONTRACTORS INDEMNITY COMPANY and an exempt workers' compensation status (no employees on payroll). The business is based in EL CAJON, in San Diego County, California.