About Us

Founded in 1995 by Larry C. Giuliani, CornerStone Security, Inc. is backed with over 40 years of combined industry experience. Larry began his career with a local franchise of a national company in 1977 in San Antonio, Texas. Additionally, he has served in sales and management positions for security system dealers in Tucson, Memphis, and St. Louis, before moving to Colorado. The Giulianis have been married for 42 years and have three sons, all of which have been or are currently employed by CornerStone.

CornerStone Security, Inc. provides state-of-the-art, electronic security solutions, video surveillance, fire alarms, access control, ID Badging, Off-site video archiving. We hold current Denver licenses for Fire Alarms (installation, monitoring and service), and Access Control systems. We are equipped to design (to include: electronic shop drawings, submittals, etc.), install, monitor and service your fire alarm or sprinkler monitoring system as well as access control systems.

Through our commitment, experience, and expertise CornerStone Security, Inc. we have established relationships with our customers that will last a lifetime!