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Centinel Security Guard Services

Security guard service · Markham, IL · reviewed since 2020

How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 69%86+59.5Reliability 31%76+23.4Craft & service penalty99−0.1Experts Score= 83Not enough data for value, replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.83SCORE
AGradeLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#24 of 36 security guard servicesPosition by Experts Score among all companies we track in this category. · better than 34%
4.8 ★★★★★ 25 Google reviews · 9 photos
96%five-star reviews
5.00★last 12 monthsAverage stars on reviews from the last 12 months only.
5%1–2★, last 20 reviewsShare of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
8%reviews answered by the owner
Sep 2026latest review

Centinel Security Guard Services at a glance

Google reviewers rate Centinel Security Guard Services 4.8 out of 5 based on 25 reviews, with the owner responding to only eight percent of comments. Customers frequently highlight the company's ability to provide immediate, last-minute security for fire watches, construction sites, and executive protection. Recurring themes include reliable punctuality, fair pricing during urgent situations, and clear communication regarding specific event needs. The primary criticism found in the low-star excerpts is a failure to return phone calls or respond to inquiries.

  • Google rating: 4.8 out of 5 from 25 reviews (96% five-star).
  • Reviews on this page: 25 Google reviews (22 with written comments).
  • Owner responses: the business replied to 8% of reviews.
  • Most recent review: September 3, 2026.
  • Service: Security Guard Company serving Markham, Illinois.

Data from Google, last updated October 25, 2026.

Score profile vs other security guard services

Score per factor (100 = best)Each factor is scored 0–100 on absolute terms (star average, share of 1–2★ reviews, price verdicts…); standing within the category can only raise it, never lower it.. Strongest: momentum and craft & service; weakest: reliability.

Satisfaction86Reliability76Craft & service99Value–Momentum100Replies to reviews–Satisfaction: 86 (median 89)Reliability: 76 (median 89)Craft & service: 99 (median 100)Momentum: 100 (median 100)
This companySecurity Guard Services median0 = centre, 100 = best
SatisfactionSatisfaction · 54% of the scoreRecency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Centinel Security Guard Services: 86/100 on this factor. Category median: 89.A
86
ReliabilityReliability · 24% of the scoreHow rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Centinel Security Guard Services: 76/100 on this factor. Category median: 89.B
76
Craft & serviceCraft & service · penalty only, up to −10 pointsGoogle review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Centinel Security Guard Services: 99/100 on this factor. Category median: 100.A
99
ValueValue · 14% of the scoreCustomers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Not enough reviews for this factor yet. Category median: 90.–
–
MomentumMomentum · penalty only, up to −10 pointsPenalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Centinel Security Guard Services: 100/100 on this factor. Category median: 100.A
100
Replies to reviewsReplies to reviews · 7% of the scoreHow often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.Not enough reviews for this factor yet. Category median: 79.–
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Bar = this company · dark tick = category median.

Star ratings

25 Google reviews we collected

  • 5 stars2496%
  • 4 stars00%
  • 3 stars00%
  • 2 stars00%
  • 1 star14%

Praise vs complaints

Phrases our text analysis found in 22 written reviews

  • Praise3297%
  • Complaints13%

Topic share

How often each topic comes up in the written reviews

  • Staff & attitude824%
  • Would recommend824%
  • Speed & response618%
  • Quality & results39%
  • Communication39%
  • Honesty & trust39%
  • Price & value26%

What customers talk about

We read 22 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.

  • “Used Jason and his team for a project we had, and everyone was really helpful to get the project to the finish line.”
  • “I highly recommend Centinel Security for the outstanding work and results they provided.”
  • “Within the same day Jason was able to provide a talented security detail.”
  • “Shawn and Phil were so incredibly professional, thorough, and kind.”
  • “Always in communication to account for last minute changes.”
  • “They are very reliable, have fair pricing and I would recommend them to anyone!”
  • “…short notice at all and didn't price gouge us at all, they were very fair.…”

praise complaint · found by our text analysis, Google review wording unchanged.

Recent reviews

ASA2 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a month ago★★★★★

Used Jason and his team for a project we had, and everyone was really helpful to get the project to the finish line. Always in communication to account for last minute changes. I will definitely call them again, highly appreciative. Thank you guys!

Joseph1 reviewTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 4 months ago★★★★★

Contacted Jason the owner of Centinel Security for an immediate solution to a highly volatile security situation at our warehouse. Within the same day Jason was able to provide a talented security detail. Over the course of two shifts for several weeks Jasons officers effectively neutralized the immediate threat to…

RachelLocal Guide · 25 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 years ago★★★★★

Needed super last minute executive armed security guard and Shawn quite literally saved the day. He pulled some strings and was able to pick up my client from the airport within 3 hours of my initial call. Shawn and Phil were so incredibly professional, thorough, and kind. If you book with them, you are in good hands.

John4 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 years ago★★★★★

100% recommend Centinel Security Services for any of your security needs. I made my initial inquiry on a Saturday afternoon and while other companies were closed for the weekend, I was connected immediately with Shawn. He was very informative, detailed and reassuring. He paid attention to the details of the event…

Sarah11 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 years ago★★★★★

Five stars for sure...if I could do 10 I would!! These guys have come through for me countless times. My first encounter with them was for a fire watch at one of my buildings over New Years. Two other companies fell through last minute, reached out to Centinel and they were there for me, short notice at all and…

Brandon1 reviewTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 years ago★★★★★

My company uses Centinel Security Guard Services and the results have been dependable and effective. Centinel is a great company to work with and I would recommend their services to anyone who need security guard services.

Photos

Customer reviews

4.8 ★★★★★ 25 reviews on Google · rating breakdown

Reviews from Google, shown as published (original wording, unedited).

Team members customers mention
Filter by topic — each topic is highlighted in the reviews in the same color
ASA Film Crew2 reviewsTotal number of Google reviews ASA has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Used Jason and his team for a project we had, and everyone was really helpful to get the project to the finish line. Always in communication to account for last minute changes. I will definitely call them again, highly appreciative. Thank you guys!

Joseph Holy1 reviewTotal number of Google reviews Joseph has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Contacted Jason the owner of Centinel Security for an immediate solution to a highly volatile security situation at our warehouse. Within the same day Jason was able to provide a talented security detail. Over the course of two shifts for several weeks Jasons officers effectively neutralized the immediate threat to our employee safety. I highly recommend Centinel Security for the outstanding work and results they provided.

Betsaide Ramirez Luis1 reviewTotal number of Google reviews Betsaide has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Great company for your organizations security. Highly recommended.

Saul RuizLocal Guide · 10 reviewsTotal number of Google reviews Saul has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Professional and reliable people to work with.

Rachel JacobsonLocal Guide · 25 reviewsTotal number of Google reviews Rachel has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Needed super last minute executive armed security guard and Shawn quite literally saved the day. He pulled some strings and was able to pick up my client from the airport within 3 hours of my initial call. Shawn and Phil were so incredibly professional, thorough, and kind. If you book with them, you are in good hands.

John Mroczek4 reviewsTotal number of Google reviews John has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

100% recommend Centinel Security Services for any of your security needs. I made my initial inquiry on a Saturday afternoon and while other companies were closed for the weekend, I was connected immediately with Shawn. He was very informative, detailed and reassuring. He paid attention to the details of the event and made sure his teams was dressed appropriately for the event (which was a black tie event). As a further measure, he assured that he would be in attendance himself to ensure a smooth, worry-free day for me. As it turned out, his services were needed and his team quickly diffused the situation without any commotion or attention drawn to the problem. I VERY HIGHLY recommend Shawn and his team for any of your security needs.

Sarah Rios11 reviewsTotal number of Google reviews Sarah has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Five stars for sure...if I could do 10 I would!! These guys have come through for me countless times. My first encounter with them was for a fire watch at one of my buildings over New Years. Two other companies fell through last minute, reached out to Centinel and they were there for me, short notice at all and didn't price gouge us at all, they were very fair. They are very reliable, have fair pricing and I would recommend them to anyone!!

Brandon Metoyer1 reviewTotal number of Google reviews Brandon has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

My company uses Centinel Security Guard Services and the results have been dependable and effective. Centinel is a great company to work with and I would recommend their services to anyone who need security guard services.

Kristina Roe5 reviewsTotal number of Google reviews Kristina has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

I recently discovered Centinel when I was in a bind and needed fire watch on a Friday night after hours. I had it all set up or so I thought with a bigger named company when I happened upon an email in the evening that the other company canceled my fire watch & my building wasn't secure as I was led to believe. I made one call to Centinel and was able to get everything taken care of immediately! Jason & Sean were highly responsive & had someone on site within an hour! Moving forward Centinel will be our go-to for all security needs.

Roseland Center2 reviewsTotal number of Google reviews Roseland has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

My name is Cynthia Alexis, Administrative Manager at the Youth Peace Center of Roseland. Our facility is pleased with the performance of Centinel Security Inc.'s staff. Questions and needs are responded to quickly by the management. I would like to compliment the Security staff for a job well done. Our doors are always guarded by two security guards as we leave each day. They are always on point. An unidentified car was spotted in our parking lot by one of the guards and he immediately took action. The security guard stayed right there until I got in my car and drove off the lot. Although the incident may have been nothing, the security guard was very observant and made me feel very safe. The Youth Peace Center recommends Centinel Security Inc., to any company seeking competitive prices. professionalism and a company that goes above ad beyond the call of duty.

Centinel Security Guard Services on Google Maps →

Business details