Sentry Security Agency Inc.

Sentry Security Agency Inc. Since 1969, Sentry Security Agency has provided professional on-site security officers for commercial and residential clients across the St. Louis metro area.

Backed by strong police and military experience, we help ensure safety and peace of mind.

Things people think security officers deal with:🚨 High-speed chases🚨 Dramatic confrontations🚨 Crime scenesThings securit...
03/16/2026

Things people think security officers deal with:
🚨 High-speed chases
🚨 Dramatic confrontations
🚨 Crime scenes

Things security officers actually deal with most:
• Doors that should be locked but aren’t
• People going where they shouldn’t
• Parking lot chaos
• Being the person everyone asks for directions and info 😅

Security is often about preventing problems before they become big ones.

If you’ve ever worked security before — what’s the most random thing someone asked you?

02/11/2026

Watchful Wednesday: Good security starts with what you can see.👀

We notice:
- Burnt-out lights in lots & entryways
- Dark corners near dumpsters / side doors
- Landscaping that creates hiding spots
- Lighting fixes are one of the fastest wins.

Sentry Security
📞 314-867-1125
🌐 www.securitystl.com
📍 9021 Riverview Drive, St. Louis, MO

We’re kicking off a new weekly series called Watchful Wednesday — because security isn’t just “standing there”, it’s not...
02/04/2026

We’re kicking off a new weekly series called Watchful Wednesday — because security isn’t just “standing there”, it’s noticing the little things before they turn into big problems.

Here’s what our guards actually notice on post:
✅ Doors that look closed…but aren’t fully latched
✅ “Just for a second” propped entrances
✅ Dark corners where lights are out
✅ The same car circling one too many times
✅ People who don’t look lost… they look curious

Sentry Security
📞 314-867-1125
🌐 www.securitystl.com
📍 9021 Riverview Drive, St. Louis, MO

If Sentry Security has helped you feel safer at your business, property, or community, we’d love a quick Google review. ...
01/14/2026

If Sentry Security has helped you feel safer at your business, property, or community, we’d love a quick Google review. Your feedback helps others find a security team they can count on.

WE ARE HIRING!! Sentry Security is hiring for both armed and unarmed security guard positions in the St. Louis and surro...
01/08/2026

WE ARE HIRING!! Sentry Security is hiring for both armed and unarmed security guard positions in the St. Louis and surrounding areas.

For more information, call 314-938-1843 or message us directly.

When people think “security guards,” they picture someone standing still in the corner. That’s not what we do.Our guards...
01/05/2026

When people think “security guards,” they picture someone standing still in the corner. That’s not what we do.

Our guards are on-site, visible, and actively paying attention. We patrol properties, respond to alarms, check buildings, and handle situations before they turn into real problems.

It’s about presence.
It’s about awareness.
It's about professionalism.
And it’s about having real people there when it matters.

That’s what Sentry Security does best.
Specialists in Protection. 🛡️

📍 Serving the St. Louis and surrounding areas.

Protecting people, property, and peace of mind across the St. Louis area.Sentry Security offers professional, licensed s...
01/03/2026

Protecting people, property, and peace of mind across the St. Louis area.

Sentry Security offers professional, licensed security officers committed to keeping your business and community safe.

📞 314-867-1125 | www.securitystl.com

🎄✨ Holiday cheer, SecuritySTL style ✨🎄Our Sentry Security and ACF Alarm teams came together to celebrate the season, ref...
12/30/2025

🎄✨ Holiday cheer, SecuritySTL style ✨🎄

Our Sentry Security and ACF Alarm teams came together to celebrate the season, reflect on the year behind us, and appreciate the people who make it all happen.

From protecting properties to showing up for our communities, none of this work happens without an incredible team in the field and behind the scenes. This day was all about good food, big prizes, and even better people.

Grateful for our crew, proud of the work we do, and excited for what’s ahead. Cheers to a safe, strong, and successful year to come 🔒🎄

Breaking and entering ✔️Trespassing ✔️Theft (cookies) ✔️Leaving gifts ✔️ — Confusing.If it’s not Santa, we’re stepping i...
12/28/2025

Breaking and entering ✔️
Trespassing ✔️
Theft (cookies) ✔️
Leaving gifts ✔️ — Confusing.

If it’s not Santa, we’re stepping in. 🎅➡️🚓

For over 50 years, Sentry Security has been keeping St. Louis safe with real people on the ground and protection you can...
12/27/2025

For over 50 years, Sentry Security has been keeping St. Louis safe with real people on the ground and protection you can count on!

From licensed armed and unarmed officers to mobile patrols, alarm response, and risk assessments, we deliver customized on-site security for businesses and residential communities — with a strong, visible presence that actually makes a difference.

Specialists in Protection.

📍 9021 Riverview Dr, St. Louis, MO
www.securitystl.com | www.sentrysecurity.net

Address

9021 Riverview Drive
St. Louis, MO
63137

Telephone

(314) 867-1125

Website

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