SELECT A DIVISION
ConstructionFacility ServicesElectronic SecurityVoice & Data
font - small font - medium font - large
Strategic Partners

Our partnership with industry leaders gives us a solid and reliable platform in which to leverage our services with maximum effectiveness.


U.S. Green Building Council

U.S. Green Building Council
USGBC is a 501 c3 non-profit organization committed to a prosperous and sustainable future for our nation through cost-efficient and energy-saving green buildings.

Visit Site
 
Western Independent Bankers

Western Independent Bankers
WIB is a trade association that informs, educates and connects community banks with the resources to achieve the highest standards of organizational performance.

Visit Site
 
Isotec Security, Inc.

Isotec Security, Inc.
Isotec develops, integrates and supplies passage control security products broadly categorized as Access Control, Weapons Control, or Materials Control Systems.

Visit Site


DSX Access Systems, Inc.

DSX Access Systems, Inc.
DSX Manufactures Integrated Solutions for the Access Control and Security Industries. "Integrated Solutions and real world applications are what we do best."

Visit Site
 
Leviton Manufacturing

Leviton Manufacturing
Leviton was founded in 1906 and has become a leading North American producer of electrical and electronic products.


Visit Site
 
OnSSI

On-Net Surveillance Systems, Inc.
OnSSI offers the most advanced non-proprietary open architecture IP video surveillance management solutions.


Visit Site


Dedicated Micros

Dedicated Micros
Dedicated Micros designs and manufactures robust camera and recording equipment to meet the demands of continuous 24-hour security video surveillance.

Visit Site
 
March Networks

March Networks
At March Networks, we focus on delivering intelligent video management solutions that help our customers realize the true business value of networked video.

Visit Site
 
Aiphone

Aiphone Communications Systems
Aiphone's brand of communication systems are unrivaled in design simplicity, technical excellence and reliability.


Visit Site


National Monitoring Center

National Monitoring Center
NMC provides contract central station monitoring to independent alarm companies nationwide.


Visit Site
 
Digital Monitoring Products

Leviton Manufacturing
Digital Monitoring Products is a recognized leader in network solutions for fast, cost-effective, centralized security monitoring in applications of all sizes.

Visit Site
 
International Facility Management Association

IFMA
IFMA is the world’s largest and most widely recognized international association for professional facility managers, supporting more than 19,500 members in 60 countries.

Visit Site


Honeywell

Honeywell International
A diversified technology and manufacturing leader, serving customers worldwide with aerospace products and services; control technologies for buildings, homes and industry; automotive products; turbochargers; and specialty materials.

Visit Site
 

 





Corporate Headquarters
560 Riverdale Drive
Glendale, CA 91204

License #749452
ACOL #5382
Northern California
23785 Cabot Blvd., Suite 317
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.