Diamond SI Employee Directory

Facilities ServicesMaryland, United States2-10 Employees

Diamond SI is a facilities services company based in Windsor Mill, Maryland, providing security and system solutions intended to protect lives and property both in the U.S. homeland and overseas. The firm operates as a small business with certifications that include SBA 8(a), Small Disadvantaged Business, and HUBZone status, and serves a mix of government and commercial clients with customized, versatile security services designed to support rapid project delivery without sacrificing quality.

Its offerings span installation and maintenance across electrical, life-safety, and security systems, including surveillance, access control, entry systems, and related protective technologies. The company emphasizes a multifaceted approach to projects, combining professional experience with ongoing adoption of new technologies, and it participates in multiple minority business programs at the state and metropolitan levels to broaden its market access. Located in the Baltimore metropolitan area, Diamond SI positions itself within the security and facilities services industry as a small, certified provider capable of handling complex requirements for a diverse client base.

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