Insights

Compliance and Certifications Diamond SI holds multiple useful certifications including SBA 8(a), SDB, and HUBZone status, which can be appealing for government agencies and large commercial clients seeking qualified vendors for security projects involving federal and local government contracts.

Comprehensive Security Offerings The company's expertise spans a wide range of installation and maintenance services such as surveillance, access control, fire safety, and communication systems, presenting opportunities to cross-sell integrated security solutions to existing clients with diverse needs.

Technological Advancement With a dedication to staying on the cutting edge of security technology, Diamond SI is well-positioned to offer advanced, innovative solutions, which can be leveraged to target clients seeking modern, scalable security infrastructure.

Market Segment Focus Serving both government and commercial sectors across various NAICS codes indicates opportunities to tailor marketing efforts toward specific industries like facilities, electrical, or information technology, to expand their customer base.

Growth Potential Although currently a small business with revenue between one and ten million dollars, Diamond SI’s specialized services and certifications position it for growth, especially if targeted outreach is made to larger organizations and government agencies with security system needs.

Diamond SI Tech Stack

Media & News

Diamond SI's Email Address Formats

Diamond SI uses at least 1 format(s):
Diamond SI Email FormatsExamplePercentage
FLast@diamondsecurityinc.comJDoe@diamondsecurityinc.com
50%
FLast@diamondsecurityinc.comJDoe@diamondsecurityinc.com
50%

Frequently Asked Questions

Where is Diamond SI's headquarters located?

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Diamond SI's main headquarters is located at Windsor Mill, Maryland 21244 United States. The company has employees across 1 continents, including North America.

What is Diamond SI's official website and social media links?

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Diamond SI's official website is diamondsecurityinc.com and has social profiles on LinkedIn.

What is Diamond SI's SIC code NAICS code?

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Diamond SI's SIC code is 7382 - Security Systems Services NAICS code is 5612 - Facilities Support Services.

How many employees does Diamond SI have currently?

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As of January 2026, Diamond SI has approximately 11 employees across 1 continents, including North America. Key team members include Principal: N. R.. Explore Diamond SI's employee directory with LeadIQ.

What industry does Diamond SI belong to?

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Diamond SI operates in the Facilities Services industry.

What is Diamond SI's email format?

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Diamond SI's email format typically follows the pattern of FLast@diamondsecurityinc.com. Find more Diamond SI email formats with LeadIQ.

Diamond SI

Facilities ServicesMaryland, United States11-50 Employees

Our Mission is to provide diamond quality security and systems solutions that protect the lives and properties of US citizens in the homeland and overseas.

DSI is a SBA-certified 8(a) SDB and HUBZone small business specializing in providing versatile customized security services to a variety of clients both government and commercial.

Our unique multifaceted approach to projects allow for a quick turnaround on the most complex projects without compromising quality of work.
Our professional experience combines well with our dedication to staying on the cutting edge of all technological advances in the respective fields we service.

INSTALLATION AND MAINTENANCE:
- Electrical Systems
- Mass Notification Systems
- Surveillance Equipment
- Audio & Visual Equipment
- Access Control 
- Telephone/Card Reader Entry Systems
- Gate Entry Control Systems
- Life Safety & Equipment Protection
        - Fire Protection
        - Chemical detection
Telephone Network
IT Hardware

U.S. Small Business Administration 8(a) Certified | SDB 
CAGE Code: 39NA1
DUNS Number: 795167324
NAICS Codes: 236210, 236220, 238210, 334310, 517110, 541690, 561621, 561622, 812921, 921190

MDOT Minority Business Enterprise # 02-563
WMATA / DDOT Minority Business Enterprise  # 1371
Baltimore City Minority Business Enterprise #08-005182

Section iconCompany Overview

Headquarters
Windsor Mill, Maryland 21244 United States
SIC Code
7382 - Security Systems Services
NAICS Code
5612 - Facilities Support Services
Employees
11-50

Section iconMedia & News

Section iconFunding & Financials

  • $1M$10M

    Diamond SI's revenue is estimated to be in the range of $1M$10M

Section iconFunding & Financials

  • $1M$10M

    Diamond SI's revenue is estimated to be in the range of $1M$10M

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