Licensed armed protection for Chicagoland.

Armstrong Security places trained, licensed officers at schools, houses of worship, businesses, and residential properties. We start by understanding your site, then staff it to the standard it needs.

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Illinois-licensed private security contractor agency, IDFPR PSCA #122.001579

Two officer tiers, matched to the post

Every site is different. We staff each post with the tier its risk calls for, so you pay for the protection you need and nothing that you don't.

Sentinels

Armed officers who observe and report

Licensed armed officers carrying the full duty load-out. They carry the full use-of-force continuum — OC spray, taser, and firearm — and deter through visible presence, direct people verbally, document what happens, and report it.

How Sentinels work

Protectors

Officers trained to engage a threat

Our advanced tier, trained in counter-terrorism response, combatives, and crowd and riot control — for posts where an officer may have to act, not just report.

How Protectors work

What sets our officers apart

Documented trainingOur officers train through a structured academy curriculum, and we can show you exactly what they've completed.
Led by someone still servingArmstrong is led by an active service member in Special Operations and a certified firearms instructor who holds officers to that standard.
Priced on the whole contractThe lowest hourly rate is rarely the lowest cost. We'll show you what coverage really costs once turnover, gaps, and risk are counted.

Quiet, professional, and on post.

Good security rarely draws attention to itself. Our officers are trained to deter first, de-escalate when they can, and act decisively when they must.

About Armstrong

Start with a site assessment.

We walk your property, review your risks, and recommend the right coverage.

Request an assessment