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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.

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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.

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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.

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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."

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Leviton Manufacturing

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


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OnSSI

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


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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.

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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.

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Aiphone

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


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National Monitoring Center

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


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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.

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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.

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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.

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License #749452
ACOL #5382
Corporate Headquarters
560 Riverdale Drive
Glendale, CA 91204
Walnut Creek Centre
2121 N. California Blvd
Walnut Creek, CA 94596
ph)
email) info@callsierra.com

Effective May 1, 2010 Sierra Group will be relocating their San Francisco Office to a new address at 237 Cabot Blvd. Suite 317 Hayward, CA 94545