Welcome to 21st Sentry Security

21st Sentry Security is a full-service security company that services the needs of business owners in the Phoenix Metro area. Our team strives to provide a level of service not found with other security companies in the area. Through hard work and a dedication to quality customer service, we have grown into the company we are today.


  • Valley Wide
  • Phoenix
  • Scottsdale
  • West Valley
  • Tempe
  • Mesa
  • Prescott

All of our security officers are very accomplished specialists in their fields. We provide constant training for our security specialists. This provides them with all the latest procedures, techniques and rules in the security industry.

Please continue to browse our website for more information about our services. If you would like to set up a free consultation, please contact our office today.


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21st Sentry Security

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Contact Information

21st Sentry Security
Phoenix, AZ  85024


YP.com Reviews

Posted By DNKPROPERTY1 On 06/17/2009
No B.S. they show up do the work on time...