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California contractor license

RDM Electric Co Inc

RDM Electric Co Inc of Ontario holds California license 539194 (C10 Electrical). The CSLB file dated Oct 31, 2026 lists it as active.1 It expires Aug 31, 2028.

Licensed 38 years, longer than 96% of 88 active Ontario electrical contractors.

Active

RDM Electric Co Inc, Ontario

License
539194
Class
C10 Electrical
Expires
Aug 31, 2028
Bond
$25,000
Workers' comp
Insured to Jul 1, 2027

CSLB file dated Oct 31, 2026

From the CSLB file dated Oct 31, 2026. Not a consumer report; check the board before you hire.

Has the board taken action on this license?

None in the CSLB file dated Oct 31, 2026. Confirm with the board: CSLB license check

What bond, insurance and workers' comp are on file?

Bond
$25,000Atlantic Specialty Insurance Company, from Sep 1, 2026, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredUnited Fire & Casualty Company, from Jul 1, 2025, to Jul 1, 2027

Who is on this license?

Officer
Diane E. Mc DonnellSince Aug 25, 1988
Responsible managing officer, CEO and president
Robert D. Mc DonnellSince Aug 25, 1988

What work does this license cover?

Issued Aug 25, 1988.

Which other Ontario businesses hold C10 Electrical?

California electrical contractors

What should you check before hiring?

What to ask before you hire

  1. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  2. Check the class covers the job. A license for one trade doesn't cover another. California license classes
  3. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  4. Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. An exemption on file means the contractor told the CSLB it has no employees.
  5. Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.

If the license is lapsed

  1. Don't sign or pay a deposit until the CSLB shows the license active again.
  2. Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the CSLB, then check again.
  3. If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
  4. Check another contractor. California license lookup

Sources

  1. CSLB License Master (cslb.ca.gov, Oct 31, 2026)
  2. Contractors State License Board (CSLB)