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The GSI Difference

It’s simple. We customize our security services to meet the specific needs of each customer & we invest in customer support rather than bloated corporate bureaucracies.

Here’s what that means for you:

  • We work with you to develop a custom training program so guards present themselves to fit your brand.
  • We provide each client with a dedicated customer service manager whose job it is to ensure we are exceeding your expectations.
  • We are very responsive and have a proactive management approach that enables us to consistantly meet the customer’s needs so issues are resolved quickly and efficiently.

Oh yeah… and did I mention we have the lowest turnover rates in the industry. That’s because we hire carefully and take care of the people who will be greeting and protecting your tenants, staff, clients and property.

About Us

GSI has been delivering on our promises since 1956.

That means taking exceptional care of our customers & guards. As a result, we have grown to become one of the largest privately held contract security providers in the Southwest.

We offer a full range of security services that are customized to meet the needs of our customers with unequaled flexibility & adaptability.

Customized training programs are created for our customers so that guards understand and adhere to each customer’s policies and guidelines.

Our guards are loyal and enjoy above industry incentives and benefits.

Security Services

Residential High-Rise

Our friendly guards are well trained to provide concierge style security services that protect the safety and well being of your tenants. Learn More…

Commercial Office Buildings

Our team of experts work with property managers to design custom security programs, emergency preparedness plans and site specific operating procedures to meet the unique needs of each individual building. Learn More…


Educational and corporate campuses require security officers that are highly interactive and engaging. GSI provides a safe campus community. Learn More…


Protect trading floors, retail branches, data centers, corporate offices and lockbox areas. Learn More…


Patrols can help ensure that no unauthorized persons are trespassing on private property and can be used to observe (or test) all accessible gates, doors, and windows and make sure they are secured. Learn More…


GSI offers expertise and guarding solutions which will aid in identifying, developing, implementing and maintaining security processes across the organization to reduce risks Learn More…


GSI helps retailers protect against direct theft from random shoplifters, dishonest clerks and even through organized retail crime. Learn More…

Join, Our Team!

When you come to work for GSI, we view you as a valuable member of our team. Guards who work for us, tend to stay longer because we know how to keep them happy. That’s why GSI has the lowest turnover rate in the industry.  Come experience the difference for yourself.

Get in touch now

We would love to hear from you! Please feel free to call us anytime at (800) 606-6711 or click the “Contact us” button below to send us an email or visit our office.

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