Insights

Comprehensive Security Offerings Diamond SI provides a broad range of security and systems solutions including electrical, surveillance, access control, life safety, and IT hardware, which presents opportunities for clients seeking integrated security management and upgrades across multiple systems.

Government & Commercial Focus With certifications such as SBA 8(a), HUBZone, and various minority business designations, Diamond SI is well-positioned to pursue government contracting opportunities as well as commercial projects requiring certified small or minority-owned business partnerships.

Technological Advancement Their commitment to staying on the cutting edge of security technology and systems integration makes them an attractive partner for clients planning to upgrade or modernize security infrastructure with the latest innovations.

Market Differentiator Despite a smaller employee base, Diamond SI’s ability to deliver quick turnaround on complex projects and maintain high-quality standards offers a competitive advantage for mid-sized organizations or government agencies needing reliable and swift security solutions.

Growth Potential With revenues estimated between 1M to 10M and a diverse client base, there are significant opportunities for expansion into larger contracts or new sectors, especially by leveraging relationships with federal, state, and local agencies as well as private sector entities.

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 Suite G, Windsor Mill, MD 21244, US. 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 October 2025, 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 ServicesUnited 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
Suite G, Windsor Mill, MD 21244, US
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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