Insights

Large Scale Reach Whelan serves numerous clients across diverse industries, indicating strong demand for flexible multi-site security programs and integrated solutions.

Growth Opportunity As a fast-growing nationwide contractor with ongoing expansion, there is a clear opportunity to upsell comprehensive security offerings such as scalable staffing and enterprise security management across existing and new accounts.

Global Synergy Garda World ownership creates a pathway for cross-selling integrated security services to multinational clients seeking U.S. coverage and global security capabilities.

Digital Readiness The current tech stack and online presence suggest readiness for technology-driven offerings, including security analytics, dashboards for clients, and integration of security tech with existing systems.

Staffing Solutions Whelan's ongoing recruitment focus signals an opportunity to offer training, credentialing, and managed staffing services to improve security outcomes for clients and maximize workforce effectiveness.

Similar companies to Whelan Security

Whelan Security Tech Stack

Whelan Security uses 8 technology products and services including WordPress, Google Fonts API, Twemoji, and more. Explore Whelan Security's tech stack below.

  • WordPress
    Content Management System
  • Google Fonts API
    Font Scripts
  • Twemoji
    Font Scripts
  • jQuery
    Javascript Libraries
  • PHP
    Programming Languages
  • Yoast SEO
    Search Engines
  • Google Analytics
    Web Analytics
  • ShareThis
    Widgets

Whelan Security's Email Address Formats

Whelan Security uses at least 1 format(s):
Whelan Security Email FormatsExamplePercentage
FLast@whelansecurity.comJDoe@whelansecurity.com
95%
First.Last@whelansecurity.comJohn.Doe@whelansecurity.com
4%
FirstLast@whelansecurity.comJohnDoe@whelansecurity.com
1%

Frequently Asked Questions

Where is Whelan Security's headquarters located?

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Whelan Security's main headquarters is located at 1699 South Hanley Road Suite 350 St. Louis, Missouri 63144 United States. The company has employees across 4 continents, including North AmericaEuropeAsia.

What is Whelan Security's phone number?

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You can contact Whelan Security's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Whelan Security's official website and social media links?

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Whelan Security's official website is whelansecurity.com and has social profiles on LinkedIn.

What is Whelan Security's SIC code NAICS code?

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Whelan Security's SIC code is 7381 - Detective, Guard, and Armored Car Services NAICS code is 5616 - Investigation and Security Services.

How many employees does Whelan Security have currently?

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As of June 2026, Whelan Security has approximately 3.1K employees across 4 continents, including North AmericaEuropeAsia. Key team members include Chief Executive Officer: K. M.Chief Financial Officer: M. M.Chief Medical Scribe: H. R.. Explore Whelan Security's employee directory with LeadIQ.

What industry does Whelan Security belong to?

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Whelan Security operates in the Security and Investigations industry.

What technology does Whelan Security use?

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Whelan Security's tech stack includes WordPressGoogle Fonts APITwemojijQueryPHPYoast SEOGoogle AnalyticsShareThis.

What is Whelan Security's email format?

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Whelan Security's email format typically follows the pattern of FLast@whelansecurity.com. Find more Whelan Security email formats with LeadIQ.

When was Whelan Security founded?

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Whelan Security was founded in 1949.

Whelan Security

Security and InvestigationsMissouri, United States1001-5000 Employees

Whelan Security is a security and investigations company headquartered at 1699 South Hanley Road, Suite 350, St. Louis, Missouri 63144, United States. It is one of the largest contract security providers in the United States and serves hundreds of clients across diverse industries nationwide. The company employs between 1,001 and 5,000 people and maintains a website at https://whelansecurity.com. In January 2019, Garda World Security Corporation acquired Whelan Security. Reported revenue falls within a range of $250 million to $500 million.

Section iconCompany Overview

Headquarters
1699 South Hanley Road Suite 350 St. Louis, Missouri 63144 United States
Phone number
SIC Code
7381 - Detective, Guard, and Armored Car Services
NAICS Code
5616 - Investigation and Security Services
Founded
1949
Employees
1001-5000

Section iconFunding & Financials

  • $250M$500M

    Whelan Security's revenue is estimated to be in the range of $250M$500M

Section iconFunding & Financials

  • $250M$500M

    Whelan Security's revenue is estimated to be in the range of $250M$500M

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