Zelko’s Security is Always On Guard! Since 1997 we’ve been serving the Washington, D.C. / Baltimore / Annapolis region. We service the commercial AND residential markets including sales, installation, and service of burglar alarm systems, electronically controlled access, and video surveillance systems. While many security companies rely on “20th century sales” we SPECIALIZE in the SERVICE that follows the installation. We take pride in the fact that we include at little or no cost to our customers our exclusive Remote Database Maintenance. This decreases service time and service expenses with the benefit of virtually NO WAITING for a technician to arrive for services such as changing an alarm code on your business to providing an access code to allow entry into your building to reviewing video after an event. A priceless feature in the event of an emergency! Contact Us for details about how you can take advantage of 21st century sales, installation, service, and Remote Database Maintenance.