Sioux Falls' trusted security & patrol company.
Locally owned. Licensed. Insured. Dispatched 24/7. From on-site guards to K9 detection, we protect what matters most to your business.
Security services built for Sioux Falls businesses.
From a single event to 24/7 site coverage — one team, one point of contact.
Commercial Security
Protect your employees, customers, and inventory around the clock.
Learn moreBomb Detection K9
The only for-hire bomb sniffing dog service in South Dakota.
Learn moreSecurity Guards
Armed and unarmed officers, in uniform or plain clothes.
Learn moreMobile Patrol
GPS-tracked vehicle patrols on random or scheduled routes.
Learn moreEvent Security
Keep attendees safe from load-in to teardown.
Learn moreContract Security
Fully licensed and insured contracts, short-term or ongoing.
Learn moreSecurity Consulting
Assessments and playbooks written by working operators.
Learn moreActive Shooter Training
Certified instructor-led training for staff and first responders.
Learn moreFour steps. No fluff. Real accountability.
Every account starts with the same simple process — because good security begins with understanding your site, not a copy-pasted proposal.
Start the process- 01
Free consultation
We walk your property, listen to your concerns, and identify real risks — not sales fluff.
- 02
Custom plan
A written security plan built for your site, staffing needs, and budget.
- 03
Vetted officers
Background-checked, professionally trained officers assigned to your account.
- 04
Ongoing reporting
Shift reports, incident documentation, and a single point of contact you can actually reach.
Trusted across every kind of Sioux Falls property.
Commercial & Retail
Loss prevention, opening/closing coverage, and after-hours patrols.
Construction Sites
Overnight patrols and materials protection during active builds.
Manufacturing & Warehousing
Access control, dock coverage, and inventory security.
Healthcare & Clinics
Discreet patient-facing security and after-hours coverage.
Events & Venues
Load-in to teardown coverage with credentialing and crowd management.
Schools & Faith Communities
Active shooter prep, event coverage, and campus consulting.
Executive & VIP
Personal protection, transport, and advance work.
Property Management & HOAs
Random patrols, alarm response, and resident-facing service.
A reputation built site by site.
Local ownership. Real accountability.
We're not a national chain routing your call through a distant call center. When you call Tri-State, you talk to someone in Sioux Falls who knows your property and can dispatch.
- Owner-led operations, not a franchise
- Officers vetted, trained, and W-2 employed
- GPS-tracked patrols with photo-verified reporting
- Fully licensed and insured in South Dakota
- The only for-hire K9 explosive detection in the state
Licensed & Insured
Full documentation available on request.
24/7 Response
Dispatchers standing by every day of the year.
Locally Based
Sioux Falls owned and operated.
Vetted Officers
Background-checked and continuously trained.
Get a free security consultation.
Tell us about your property. We'll walk the site, listen, and put together a plan — no obligation.