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California contractor license

Sefnco Communications Inc

Sefnco Communications Inc of Sumner holds California license 913292 (A General Engineering, C7 Low Voltage Systems). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Apr 30, 2028.

Licensed 18 years, longer than 67% of 62,372 active California general contractors.

Active

Sefnco Communications Inc, Sumner

License
913292
Class
A General Engineering; C7 Low Voltage Systems
Expires
Apr 30, 2028
Bond
$25,000
Workers' comp
Insured to Sep 15, 2027

CSLB file dated Nov 1, 2026

From the CSLB file dated Nov 1, 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 Nov 1, 2026. Confirm with the board: CSLB license check

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

Bond
$25,000Travelers Casualty And Surety Company Of America, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredAce American Insurance Company, from Sep 15, 2026, to Sep 15, 2027

Who is on this license?

Officer
Alberto I. de CardenasSince Jun 28, 2017
Officer
Robert E. AppleSince Jun 28, 2017
Officer
Paul A. DimarcoSince Aug 3, 2023
Officer
David L. KarianSince Aug 8, 2024
Responsible managing officer
Robert M. LopezSince Nov 19, 2020
CEO and president
Seth R. SherwoodSince Feb 14, 2024

What work does this license cover?

Issued Apr 2, 2008.

Where are other licensed California contractors listed?

California general 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, Nov 1, 2026)
  2. Contractors State License Board (CSLB)