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Products & Services
About Sentry
This profile covers Sentry, a company operating in Office service, employing 6-10 people, reporting $1M-$5M in annual revenue, classified under Investigation and Security Services and based in Diamond Bar, California, United States.
Its primary NAICS classification is 561621 (Security Systems Services (except Locksmiths)). Sentry is one of 2,121,238 Industrial & mechanical companies listed in California.
Business Contact Information
- Address
- 24321 Sentry Dr, Diamond Bar, California, 91765, United States
Industry & Classification
- Industry
- Industrial & mechanical
- Sector
- Commercial services
- Segment
- Office service
NAICS Codes
- 56Administrative and Support and Waste Management and Remediation Services
- 5616Investigation and Security Services
- 561621Security Systems Services (except Locksmiths)
SIC Codes
- 73Business Services
- 738Miscellaneous Business Services
- 7382Security Systems Services (Except Locksmiths)
Company Details
- Employees
- 9 (6-10)
- Annual Revenue
- $1.2M ($1M-$5M)
Sentry: frequently asked questions
What does Sentry do?
This profile covers Sentry, a company operating in Office service, employing 6-10 people, reporting $1M-$5M in annual revenue, classified under Investigation and Security Services and based in Diamond Bar, California, United States.
Where is Sentry located?
Sentry is headquartered at 24321 Sentry Dr, Diamond Bar, California, 91765, United States.
How many employees does Sentry have?
Sentry has about 9 employees (the 6-10 range).
What is Sentry's annual revenue?
Sentry's annual revenue is estimated at $1.2M (the $1M-$5M range).
What industry is Sentry in?
Sentry is in the Industrial & mechanical / Commercial services industry, and its primary NAICS code is 561621 (Security Systems Services (except Locksmiths)).
What companies are similar to Sentry?
Other large industrial & mechanical companies in California include State of California, TD SYNNEX Corp, University of California and Ingram Micro Holding Corp.
Largest industrial & mechanical companies in California
Largest companies in California
Largest industrial & mechanical companies
Manufacturing sales in California, 2026
In California, Factur's 2026 study counted 98 manufacturing quotes worth $14.7M and 18 purchase orders over 12 months: 18% of quotes became orders, against 21% nationally. See the California data.
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