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Security Companies in Baltimore, Maryland

Baltimore City and Baltimore County are separate jurisdictions, so confirm which one a company covers. Maryland State Police handle security guard agency licensing.

By Security Briefing, an independent publication. Details checked . Listings are not endorsements.

City or county?

Baltimore City

An independent city, not part of the county. Parking, event, and alarm rules can differ, so give any company your exact address.

Baltimore County

Surrounds the city and includes Towson and other communities. A “Baltimore” company may serve only one of the two.

Companies with a Baltimore address on their page

  • Allied Universal

    Office listed

    36 S Charles Street Suite 2300 Baltimore, MD 21201

    Consider for: Offices and commercial property, events and venues, healthcare sites

    BBB Not rated 0 complaints in 3 yrs
    More about Allied Universal
    • In its own words: “Because every industry has its own regulations and security challenges, we invest in a dedicated team for the industries we serve.”
    • BBB accreditation: Not accredited, which BBB says is optional

    Visit company website

  • Executive Protection Services (EPS)

    Office listed

    400 E Pratt St 800, Baltimore, MD 21202

    Consider for: Offices and commercial property, HOAs and residential property, events and venues

    No matching BBB or Yelp profile found
    More about Executive Protection Services (EPS)
    • In its own words: “Echelon Protective Services delivers a command-level standard built by former State Police leadership, setting us apart from other private security companies Baltimore MD.”

    Visit company website

Companies that say they serve Baltimore

  • Defender Security

    Says it serves the area

    “The JCC of Greater Baltimore’s events-driven campus needs guards who know the community, not just the building”

    Consider for: Events and venues, healthcare sites, offices and commercial property

    No matching BBB or Yelp profile found
    More about Defender Security
    • In its own words: “Family-owned and led by a seasoned law enforcement professional, Defender One delivers reliable, responsive contracted security guards tailored to your needs.”

    Visit company website

  • Prosegur

    Says it serves the area

    “Baltimore Security Guard Company”

    Consider for: Offices and commercial property, healthcare sites, events and venues

    No matching BBB or Yelp profile found
    More about Prosegur
    • In its own words: “Prosegur Security is a licensed Baltimore security guard company serving commercial clients throughout Baltimore and the Baltimore-Washington corridor.”

    Visit company website

  • Securitas

    Says it serves the area

    “Contact Securitas Security Services in Linthicum, Baltimore”

    Consider for: Mobile patrols, events and venues, personal protection

    No matching BBB or Yelp profile found
    More about Securitas
    • In its own words: “We offer many ways to keep you safe, from on-site security guards to advanced electronic security.”

    Visit company website

  • Sunstates Security

    Says it serves the area

    “Baltimore Security Services”

    Consider for: HOAs and residential property

    No matching BBB or Yelp profile found
    More about Sunstates Security
    • In its own words: “Since 1998, Sunstates Security has provided stellar security personnel services.”

    Visit company website

  • The Watkins Group

    Says it serves the area

    Company page for this area

    Consider for: Offices and commercial property, mobile patrols, armed posts

    BBB A+ 0 complaints in 3 yrs
    Yelp 1.0 out of 5 on Yelp 1 review
    More about The Watkins Group
    • Years in business: 45, per BBB
    • BBB accreditation: Not accredited, which BBB says is optional

    Visit company website

Alphabetical. BBB details come from its profile; Yelp scores from Yelp's search listing, for the location shown. A score from a few reviews says little. We don't rate companies ourselves. Checked November 6, 2026. Pages rarely say whether “Baltimore” means city or county, so ask.

Questions to ask

  • Do you cover my address: city, county, or both?
  • Are your officers on a posted site, or patrolling several clients in the corridor to Washington?
  • Who responds if our building is in the city but your branch is outside it?

Also see commercial security and corporate programs.