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Sierra Group Corporate Offices

Corp. Headquarters
560 Riverdale Drive
Glendale, CA 91204

ph) 888-880-4949
fax) 818-637-2111
email) info@callsierra.com


Northern California
237 Cabot Blvd.
Hayward CA 94545

ph) 888-880-4949
fax) 818-637-2111
email) info@callsierra.com



Directions / Map:

We are located 2 blocks south of Colorado Boulevard just off of San Fernando Road. The closest freeway is the Golden State Freeway (5). A nearby landmark is Home Depot to the north of us on San Fernando Road.

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Email Us!

Carl Frommer
President / CEO
email) cfrommer@callsierra.com

Richard Freeman
Executive Vice President
email) rfreeman@callsierra.com

Monica Valenzuela
Director of Operations
email) mvalenzuela@callsierra.com


Contact Form

Corporate Headquarters
560 Riverdale Drive
Glendale, CA 91204

License #749452
ACOL #5382
Northern California
23785 Cabot Blvd.
Hayward, CA 94545
ph)
email) info@callsierra.com

Sierra Group is a California statewide commercial general contracting firm that brings together three unique facility based service divisions, commercial construction, facilities maintenance, electronic security surveillance and business alarms, operating under one company. Our commitment, dependability and sensitivity to operational schedules, environments and cost effective solutions allow us to provide a total solution for all of your building maintenance needs.