License is active
Source: Contractors State License Board (CSLB)
Licensed
Current and in good standing
Bonded
$25,000 surety bond
Insured
Workers' comp coverage on file
Clean record
No complaints or disciplinary actions
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MAS SERVICE
DBA: JB MECHANICAL INC
Owner: JB MECHANICAL INC DBA MAS SERVICE
- License Number
- 498289
- State
- California
- Status
- active
- Business Type
- Corporation
- Address
- 5083 LONE TREE WAY ANTIOCH, CA, 94531 Contra Costa County
- Phone
- (888) 314 0451
License Dates
Issued
09/15/1986
Expires
06/30/2026
Expires in 11 weeks
Inactivated
10/28/1998
Reactivated
06/05/2000
CSLB Last Updated
03/03/2026
License Classifications
Personnel & Officers
BILLHEIMER JOHN ALAN
Responsible Managing Officer/Chief Executive Officer/President
BILLHEIMER CORINNE K
Officer
ROBELLO RICHARD PAUL
Responsible Managing Employee
Qualifier bond: STAR INSURANCE COMPANY
CLARK GARY L
Officer
MYERS ELIZABETH KATHLEEN
Officer
BURGHER GEORGE J
Officer
GELDERT FRANK DUNBAR JR
Responsible Managing Employee
Qualifier bond: AMERICAN CONTRACTORS INDEMNITY COMPANY
Contractor Bond
Amount: $25,000
Company: OHIO CASUALTY INSURANCE COMPANY (THE)
Bond #792706C
Effective: 01/01/2023
Workers' Compensation
Carrier: INSURANCE COMPANY OF THE WEST
Policy #WPL508874000
Effective: 03/03/2026
Expires: 03/03/2027
CSLB designation: Workers' Compensation Insurance
Complaints & Disciplinary History
This reflects CSLB's bulk license data. For detailed complaint history including pending investigations, check the official CSLB record.
Verify this record on the official state licensing board
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California licensing guide →Data sourced from official state licensing board records. Always confirm critical information directly with the state board.