About Us

First Security Systems is a security and investigation firm located in Fort Worth, Texas. The company was founded in 1999 by Brent and Lee Sandlin and has since grown from two employees to more than 40 part- and full-time employees, including security officers, investigators, and personal protection officers.

In 2015, the company began training and equipping security officers with Tasers, an effective alternative to deadly force. First Security officers receive quarterly tactical and weapons retention training.


First Security Systems values protection, capability, and integrity. We display these values by developing capable, specialized employees who make the community safer for everyone.


First Security Systems understands that companies want their customers, employees, and property protected. Our security officers undergo regular training to handle volatile situations. Meanwhile, their vigilance enables them to stay ahead of potential threats and take decisive action when necessary.


Our staff receives routine field compliance reviews and undergoes both state- and First Security-mandated training to become the best at what they do.


In an effort to provide the best security for our customers, we demand total transparency from every employee. While we are discreet and professional, we are also 100% up front about every situation. At First Security, we never compromise in our demand for honor and integrity.