Our home base at 150 Mason Circle, Suite K. Energen Systems has served the East Bay since 1988, providing generator service to refineries, hospitals, data centers, and commercial facilities across Contra Costa and Alameda counties.
What We Do
Preventive maintenance programs
NFPA 110 load bank testing
Emergency generator repair (24/7)
Automatic transfer switch service
Controller retrofits and upgrades
Engine overhauls and rebuilds
Fuel system service and polishing
Coolant and exhaust system repair
Who We Serve
John Muir Health and regional medical facilities requiring NFPA 99 and Joint Commission compliance.
Chevron, Shell, and Martinez-area refineries with critical standby power infrastructure.
Office parks, retail centers, and mixed-use developments throughout Contra Costa County.
Colocation and enterprise facilities demanding five-nines uptime.
City of Concord, county buildings, water treatment, and emergency services.
Manufacturing, warehousing, and distribution facilities across the East Bay corridor.
Common Questions
Our headquarters is at 150 Mason Circle in Concord, so East Bay response times are the fastest in our service area. For Concord, Walnut Creek, Pleasant Hill, and Martinez, we can typically have a technician on site within 1 to 2 hours of an emergency call.
Yes. We maintain standby generators at petroleum refineries, chemical plants, and heavy industrial sites across Martinez, Richmond, and the Contra Costa corridor. Our technicians hold the safety certifications required for refinery and hazardous environment work.
We service all major generator brands including Caterpillar, Cummins, Kohler, Generac, MTU, and Mitsubishi. We also work on older and legacy units. If it has an engine and makes power, we can maintain it.
Yes. Energen Systems has operated from Concord since 1988. Our shop, parts inventory, and dispatch are all based at 150 Mason Circle, Suite K, giving us direct access to I-680, Highway 4, and I-580 for rapid coverage across the entire East Bay and Central Contra Costa.
We do. Our maintenance contracts include scheduled quarterly or semi-annual visits, annual load bank testing, fluid analysis, and 24/7 priority emergency dispatch. Most office parks, medical buildings, and retail centers in Walnut Creek, San Ramon, and Concord are on contract programs with us.