Insights

Market Leadership Whelan Security is one of the largest and fastest-growing contract security providers in the United States, serving a diverse range of industries. This extensive client base presents numerous cross-selling and upselling opportunities for complementary security products and managed services.

Acquisition Backing The recent acquisition by Garda World Security Corporation enhances Whelan's credibility and financial backing, which can be leveraged to position premium service offerings and expanded security solutions to prospective clients seeking reputable providers.

Revenue Potential With annual revenues estimated between $250 million and $500 million and a workforce of up to 5,000 employees, Whelan has substantial operational capacity. This scale indicates capacity for deploying large security projects and customized solutions tailored to enterprise clients.

Industry Growth As a leading player in the security and investigations industry, Whelan operates in a sector with ongoing demand driven by rising safety concerns and regulatory requirements. This trend offers growth opportunities through innovative security technologies and integrated safety solutions.

Technology Utilization Whelan’s investment in digital tools such as Google Analytics and SEO optimization indicates an active approach to digital engagement. This digital presence can be expanded with advanced security management platforms, client portals, and analytics-driven security insights to attract tech-savvy clients.

Similar companies to Whelan Security

Whelan Security Tech Stack

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

  • WordPress
    Content Management System
  • Twemoji
    Font Scripts
  • Google Fonts API
    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.

How much revenue does Whelan Security generate?

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As of February 2026, Whelan Security's annual revenue is estimated to be $5B.

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 February 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 WordPressTwemojiGoogle Fonts APIjQueryPHPYoast 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’s commitment to quality and service has made us one of the foremost respected, successful and fastest growing companies in the industry. Today, we rank as one of the largest contract security companies operating in the United Sates, and serve hundreds of different clients in many diverse industries throughout the United States.

As we continue to grow, we have a consistent need for talented, assertive and positive individuals who have a friendly attitude, strong initiative, and the desire to lead in security officer jobs. If you are looking for a challenging and rewarding career in the security industry, we encourage you to take the first step towards becoming a part of the Whelan team.

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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