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California contractor license
Professional Telecommunications Services Inc
Professional Telecommunications Services Inc of Livermore holds California license 900567 (C7 Low Voltage Systems, C10 Electrical, C28 Lock and Security Equipment, D16). The CSLB file dated Oct 31, 2026 lists it as active.1 It expires Nov 30, 2026.
Licensed 19 years, longer than 51% of 72 active Livermore electrical contractors.
Active
- License ends Nov 30, 2026 (30 days)
Professional Telecommunications Services Inc, Livermore
- License
- 900567
- Class
- C7 Low Voltage Systems; C10 Electrical; C28 Lock and Security Equipment; D16
- Expires
- Nov 30, 2026
- Bond
- $25,000
- Workers' comp
- Insured to Jun 6, 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
- $25,000American Contractors Indemnity Company, from Feb 23, 2026, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- InsuredSentinel Insurance Company LTD, from Jun 6, 2026, to Jun 6, 2027
Who is on this license?
- Officer
- Etienne G. GibbsSince Nov 14, 2008
- Responsible managing officer, CEO and president
- Jeffrey L. O'BrienSince Jul 20, 2007
- Responsible managing employee
- Donald P. GranizoSince Feb 28, 2017
What work does this license cover?
Issued Jul 20, 2007. Reissued Nov 14, 2008.
- C7 Low Voltage Systems
- C10 Electrical
- C28 Lock and Security Equipment
- D16
Which other Livermore businesses hold C7 Low Voltage Systems?
- Ams.Net LLCLicensed since 1999
- Three Alarm Fire ProtectionLicensed since 2006
- Three Alarm Electrical Systems IncLicensed since 2010
- Bay Area Security Specialists IncLicensed since 2010
- Ag Security Services IncLicensed since 2013
What should you check before hiring?
What to ask before you hire
- Ask whether it has been renewed. Something on this license ends within 60 days. Check again before you pay a deposit.
- Get the license number in writing. The name on the license should match the name on your contract and invoice.
- Check the class covers the job. A license for one trade doesn't cover another. California license classes
- Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
- 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.
- 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
- Don't sign or pay a deposit until the CSLB shows the license active again.
- 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.
- If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
- Check another contractor. California license lookup
Sources
- CSLB License Master (cslb.ca.gov, Oct 31, 2026)
- Contractors State License Board (CSLB)