Providing service-first private security for Montana, Wyoming, and North Dakota since 1982. As a family owned and operated company, Sundown Security is proud to serve communities across the Northwest Region and companies of all sizes with a variety of security offerings. Providing timely, secure, and efficient services helps your business minimize risk. Choosing our company, you will experience a customer service focused service, ensuring you never feel like just another client. With more than 35 staff members trained in armed and unarmed security guard service, weve got the team to meet your needs. Services We Offer Your security needs are not a one size fits all scenario, and thats something we understand. We have a variety of offerings, and can customize your contract to be exactly what you need for your budget. Our most utilized services include private security guard patrol and posts, armed cash and asset transit, and ATM service and repair. Our services are ideal for everyday risk management, and can be provided in temporary and emergency situations.