3SI Security Systems
Commercial services · Malvern, Pennsylvania
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Products & Services
About 3SI Security Systems
With over 50 years experience, 3SI protects more than 250,000 locations worldwide. Our innovative solutions combat crime through a variety of technologies including GPS Tracking and Dye and Ink Staining.
Its primary NAICS classification is 541990 (All Other Professional, Scientific, and Technical Services). 3SI Security Systems is one of 784,164 Industrial & mechanical companies listed in Pennsylvania.
Business Contact Information
- Phone
- +1 (800) 5231430
- Website
- www.3sisecurity.com
- facebook.com/3sisec
- Address
- 101 Lindenwood Dr, Malvern, Pennsylvania, 19355, United States
Industry & Classification
- Industry
- Industrial & mechanical
- Sector
- Commercial services
- Segment
- Office service
NAICS Codes
- 54Professional, Scientific, and Technical Services
- 5419Other Professional, Scientific, and Technical Services
- 541990All Other Professional, Scientific, and Technical Services
SIC Codes
- 89Miscellaneous Services
- 899Miscellaneous Services
- 8999Environmental Consulting Services
Company Details
- Employees
- 233 (101-250)
- Annual Revenue
- $40.1M ($25M-$50M)
3SI Security Systems: frequently asked questions
What does 3SI Security Systems do?
With over 50 years experience, 3SI protects more than 250,000 locations worldwide. Our innovative solutions combat crime through a variety of technologies including GPS Tracking and Dye and Ink Staining.
Where is 3SI Security Systems located?
3SI Security Systems is headquartered at 101 Lindenwood Dr, Malvern, Pennsylvania, 19355, United States.
How many employees does 3SI Security Systems have?
3SI Security Systems has about 233 employees (the 101-250 range).
What is 3SI Security Systems's annual revenue?
3SI Security Systems's annual revenue is estimated at $40.1M (the $25M-$50M range).
What industry is 3SI Security Systems in?
3SI Security Systems is in the Industrial & mechanical / Commercial services industry, and its primary NAICS code is 541990 (All Other Professional, Scientific, and Technical Services).
How can I contact 3SI Security Systems?
Its website is www.3sisecurity.com and its phone number is +1 (800) 5231430.
Largest companies in Pennsylvania
Largest industrial & mechanical companies
Manufacturing sales in Pennsylvania, 2026
In Pennsylvania, Factur's 2026 study counted 44 manufacturing quotes worth $1.6M and 10 purchase orders over 12 months: 23% of quotes became orders, against 21% nationally. See the Pennsylvania data.
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