A Professional Employment Organization You Can Trust

Every PEO is different, and you deserve the best when it comes to hiring a professional employment organization. At Diamond PEO, we handle everything from employee benefits to workers’ compensation, and we will give you the personalized care and attention that you deserve.

Find the Perfect Payroll Solution for Your Business

Call (714) 796-9110

Diamond PEO Offices

Corporate Office
27442 Calle Arroyo
Cottage 45
San Juan Capistrano, CA 92675

Los Angeles Office
879 West 190 Street Suite 400
Gardena, CA 90248

Riverside Office
12139 Mt Vernon Ave Suite 105
Grand Terrace, CA 92313

Diamond PEO Canada Office
2416 Main Street, Suite 398
Vancouver, BC, V5T 3E2

Oregon Office
650 NE Holladay Street, Suite 1600
Portland, OR 97232

Service Area
Nationwide Services, including Hawaii & Alaska.


(714) 796-9110

Hours of Operation
Monday – Friday: 8:00 a.m. – 5:00 p.m.

Customer Contact Hours
For 24/7 After-Hours Support,
Call (949) 724-4504