Black Hills Info Security
308 Julius Street, Lead, SD 57754
(605)722-0599
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Mountain States Security Incorporated
306 Main St, Rapid City, SD 57701
(605)343-7448
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United States Government - Defense Dept, Defense Security Service
Rapid City, SD 57701
(605)385-1813
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http://www.firstgov.gov

G 2 Secure Staff
3001 N Minnesota Avenue, Sioux Falls, SD 57104
(605)338-0733
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Big-M Security & Alarm
203 W City Limits Road, Yankton, SD 57078
(605)665-9223
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Black Watch Inc
4447 S Canyon Road, Rapid City, SD 57702
(605)341-8787
blackwatch@rushmore.com
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www.blackwatchinc.com

Sioux Merchant Patrol & Sec
1501 N Cleveland Avenue, Sioux Falls, SD 57103
(605)334-9357
(605)334-2712
(888)403-1803
smpsecurity@msn.com
phone phone   email email   Business Profile 

www.smpsecurity.com

Guardsmark Inc
401 E 8th Street # 200P, Sioux Falls, SD 57103
(605)335-4381
(605)335-4401
(888)259-7972
phone phone  

Tri-State Security & Patrol
5404 W 9th Street, Sioux Falls, SD 57107
(605)330-4014
(605)330-0237
(800)332-4014
phone phone   Business Profile 

Oglala Sioux Tribe Offices Headstart - Security Services
Pine Ridge, SD 57770
(605)867-1747
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Answer One Services
Yankton, SD 57078
(605)655-9490
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G2 Secure Force
3001 North Minnesota Avenue, Sioux Falls, SD 57104
(605)338-0733
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Absolute Detective & Bodyguard
601 S 1st Avenue # 101, Sioux Falls, SD 57104
(605)334-2043
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Guardsmark Inc LLC
1317 River Drive, North Sioux City, SD 57049
(605)232-5193
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Aberdeen Security & Invstgtns
2209 17th Avenue SE, Aberdeen, SD 57401
(605)226-2877
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