Welcome to National Alarm Systems

National Alarm Systems, former owners of Kertz Security Systems, is the one unique company catering only to local South Florida residents and commercial establishments and we’ve been doing it for nearly 60 years. We’re proud to be one of the oldest and most respected security and fire alarm companies in the state. Just because we’re big, doesn’t mean we act it. All our work is done by our trained and certified technicians. Our growth and penetration in the South Florida market is due entirely to our commitment to complete customer satisfaction.

When we opened our doors back in 1949, our mission was to become a leader in commercial and residential security. In this industry where the technology and equipment is the same across the board, there is only one way to differentiate the leaders; pricing and service. We’ve learned that we have to take care of our customers, or someone else will. That is why we don’t raise our rates. Once you’re a customer, you can rest assured that what you’re paying now is what you’ll pay 20 years from now. It’s a promise we’ve kept and we don’t intend to change. Our commitment to complete customer satisfaction can’t stop here. We also understand that things break down; it’s a fact of life. Our technicians are always ready for life’s daily challenges, and it comes at no additional cost to you, nor do we charge you a ‘trip’ fee. We just wouldn’t feel right capitalizing on your hardship. It’s our privilege to serve you, consider it our way of saying thanks. We didn’t become the largest, local independent security company overnight; it took years of quality service and competitive pricing. Thank you for giving us the opportunity to compete for your business.