Customers

California customers CAMBE covers

Browse every customer, whether or not it matches what you sell. Most large companies don’t post contract opportunities publicly, so their supplier program is the place to start.

Find your best fits

Utilities

Technology · Construction · Professional Services

AT&T

Communications company that connects people and businesses through its wireless network and other connectivity services.

How to startOpen registration · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: AT&T Supplier Inclusivity Program

SourceAT&T Corporate ProfileChecked Oct 19, 2026
Construction · Professional Services

California American Water

Water utility that provides water and wastewater services in California, serving about 700,000 people.

How to startOpen registration · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: Supplier Diversity Team

Construction · Professional Services

California Water Service (Cal Water)

Regulated water utility based in San Jose that provides water and wastewater services to over 100 California communities.

How to startOpen registration · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: Supplier Diversity Program Manager

Technology · Construction · Professional Services

Comcast

Global media and technology company that provides broadband and mobile services and reaches customers and viewers worldwide.

How to startOpen registration · Supplier.io (SupplierOne) · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity
Construction · Professional Services

Golden State Water Company

Regulated California water utility, a subsidiary of American States Water Company, serving about 262,000 customer connections in more than 81 communities.

How to startInterest form · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: Supplier Diversity Program Manager

Construction · Professional Services · Technology

Pacific Gas and Electric Company (PG&E)

Utility incorporated in California in 1905 that provides natural gas and electric service to about 16 million people across northern and central California.

How to startOpen registration · Supplier.io (SupplierOne) · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: Supply Chain Responsibility (SCR) team

Construction · Professional Services · Technology

San Diego Gas & Electric (SDG&E)

Energy utility that delivers electricity and natural gas to 3.7 million people across a 4,100-square-mile service area spanning two counties and 27 cities.

How to startInterest form · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: Responsible Sourcing / Supplier Diversity

Construction · Professional Services

San Jose Water

Regulated private water utility, founded in 1866, that delivers water directly to homes and businesses for over 1 million people in the greater San Jose area.

How to startOpen registration · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: Director of Supplier Diversity

Construction · Professional Services · Technology

Southern California Edison (SCE)

Investor-owned electric utility and Edison International subsidiary that delivers electricity to about 15 million people across central, coastal and Southern California.

How to startOpen registration · SAP Ariba · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: Supplier Diversity & Development (SD&D) team

Construction · Professional Services · Technology

Southern California Gas Company (SoCalGas)

Regulated natural gas distribution utility, a subsidiary of Sempra, serving about 21.1 million consumers across roughly 24,000 square miles of Central and Southern California.

How to startOpen registration · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: Responsible Sourcing (shared SDG&E/SoCalGas supplier intake)

Technology · Construction · Professional Services

T-Mobile

Wireless carrier based in Bellevue, Washington, that provides 4G LTE and nationwide 5G network services under the T-Mobile, Metro by T-Mobile and Mint Mobile brands.

How to startOpen registration · Supplier.io (SupplierOne) · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: Supplier Enablement

Technology · Construction · Professional Services

Verizon Wireless (including Frontier)

Communications technology company offering mobile, home internet and fiber broadband, and 5G network services to consumers, businesses and public sector customers.

How to startSupplier page · Register
Recognized certifications
California Public Utilities Commission (CPUC) General Order 156 supplier diversity

Contact: Verizon Small Business Supplier Accelerator

About this list

Every line comes from a public source, shown on each card with the date it was checked. Listing isn’t paid for and doesn’t mean a customer is buying what you sell; confirm with the customer before you bid. CAMBE isn’t affiliated with or endorsed by the customers listed. Know one CAMBE should include? Email hello@cambe.app.