Highlands Ranch residents can rest assured that Pinnacle Security will provide a way to preserve what matters most. Our monitoring facilities are standing by 24 hours a day, 7 days a week, to help in any emergency situation at any time. Security systems for homes, apartments, and businesses are Pinnacle Security.s specialty At Pinnacle Security, you can expect great customer service and low prices. Contact a Pinnacle Security representative about protecting your family, your business, and your possessions today.