Mountain States Security, Inc. is a BBB Accredited Security Guard in Rapid City, SD
Mountain States Security, Inc. is a BBB Accredited Security Guard in Rapid City, SD

Proudly serving Western
South Dakota for over 37 years

About Us

Mountain States Security, Inc. was founded in 1986 by Karen and Roger Kierstead. Roger had been in law enforcement since 1962. He served as Chief of Police in Herrick and Platte, S. D. , and as Deputy Sheriff in Gregory and Charles Mix counties. After this, Roger moved to Rapid City and served on the Rapid City Police Department. In 1986 he ended his police duties to start Mountain States Security. Sadly, Roger departed in 2014. Karen started her career in law enforcement as a loss prevention officer in 1978. She was hired in 1980 by the Pennington County Sheriffs Office as a Correctional Officer and served as a member of the Pennington County Reserve Unit as a road deputy and also served as a member of the K-9 unit. During the years of Roger’s declining health, and after his death, Karen had the help of Air Force and Army Veterans Dallas Westwood and AJ Amos to help keep Mountain States Security moving forward. In 2019 they left the company to help their own family member with declining health issues. Firearm and Badge Chris Knight is the Operations Manager. He graduated from the Western Dakota Tech Criminal Justice – law Enforcement Emphasis program while working as a Security Officer for Mountain States Security. He has been with the company since July 2019.

Primary NAICS: 561612

Primary PSC Code: S206

Cage: 3FNA9

Duns: 956700868

Why Mountain States Security?

Mountain States Security, Inc takes your personal well-being very seriously. We make our clients feel comfortable carrying on with business or celebrating a momentous occasion. Most of our staff hails from prior police and military employment. They bring with them years of experience as well as a mental toughness that is required to be a security officer at our company. We remain ever cautious and pursue proactive interventions whenever possible. When you hire our security officers, you receive top-notch service guaranteed. Our seasoned officers are not lacking skill or authority. We are the premier security company in the Black Hills. Our company and officers are licensed, bonded and insured.


From small to large consumer locales we offer unsurpassed patrol security. Every security officer works in coordination with one another to promote efficient and accurate performance.

Want to know when the officer was on site and for how long? Want all of your Call Response and Incident Reports in one place? Done! With your TrackTik Client Portal you will have 24/7 access to this information and more!

Post - On Site security

As a responsible business owner, your top priority is the functioning of your establishment. Your worries should extend to your employees, products, customers and cash flow. At no point in time should your productivity suffer due to external threats. In the event you experience or anticipate illegal activity impeding your ability to do business, talk to Mountain States Security, Inc. Our security company handles all safety needs and lets you focus on running your business.

If you do business in an area where theft and vandalism run rampant, you may benefit from our impeccable on site security services. Sometimes, a show of force is all you need to deter a would-be crime. In the case a crime does occur, our company works efficiently with local police departments to ensure that perpetrators are swiftly caught and dealt with.

Special Event Security

Mountain States Security, Inc. Provides customer service-focused security solutions that extends to corporate and private events as well. We create and execute solutions for our clients to accomplish their event specific safety and security objectives. From corporate events and fundraisers to concerts and more, turn to the experienced professionals at Mountain States Security, Inc, for you next special event.

Special event security is need-specific and different every time. Our temporary event security solutions are flexible enough to adapt to changes in season, location, type of event, and clientele. Reliability, professionalism, and ability to adapt and react in a dynamic setting are a must.

Cash In Transit

Mountain States Security, Inc. Supplies exceptional cash delivery. Whether the intended location is a bank, ATM, or some other money center, we offer a secure cash management service tailored to each client. Make sure your cargo arrives intact in the speediest, safest manner possible! Banks and other high-end businesses often transfer valuable items from one location to another. When your cargo involves banknotes, coins, and cash, you want to leave absolutely nothing to chance. Mountain States Security, Inc. Offers a guaranteed safe transit giving you peace of mind. Our personnel are trained to spot threats and make necessary adjustments protecting your employees from work comp liability.

Officer Training

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