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California contractor license

Siemens Industry Inc

Siemens Industry Inc of Buffalo Grove holds California license 758796 (C10 Electrical, C16 Fire Protection, C20 Warm-Air Heating, Ventilating and Air-Conditioning). The CSLB file dated Oct 31, 2026 lists it as active.1 It expires Feb 28, 2027.

Licensed 27 years, longer than 82% of 15,216 active California electrical contractors.

Active

Siemens Industry Inc, Buffalo Grove

  • Workers' comp on file ended Oct 1, 2026.
License
758796
Class
C10 Electrical; C16 Fire Protection; C20 Warm-Air Heating, Ventilating and Air-Conditioning
Expires
Feb 28, 2027
Bond
$25,000
Workers' comp
Insured to Oct 1, 2026

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
$25,000Federal Insurance Company, from Jan 1, 2023, continuous
Liability insurance
Not in the CSLB fileCheck with the board
Workers' comp
InsuredTravelers Property Casualty Company Of America, from Oct 1, 2025, to Oct 1, 2026

Who is on this license?

Officer
Heiko VolpertSince Jun 29, 2023
CEO and president
Ruth GratzkeSince Jun 29, 2023
Responsible managing employee
Matthew E. HansonSince Aug 14, 2020
Responsible managing employee
David M. YoungSince Apr 2, 2024
Responsible managing employee
Joel L. MorenoSince Jun 23, 2025

What work does this license cover?

Issued Feb 4, 1999.

Where are other licensed California contractors listed?

California electrical contractorsCalifornia HVAC 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)