Insights

Market Leadership Whelan Security is one of the largest contract security providers in the United States with a substantial client base across diverse industries, indicating strong market reach and potential for cross-industry service expansion and multi-site contracts.

Expansion Readiness Acquired by Garda World in 2019 signals access to greater capital, resources, and a broader network, presenting opportunities for upselling higher-end security services, integrated solutions, and geographic expansion collaborations.

Growth Potential Revenue range of several hundred million and a large employee base suggests scale advantages; identify up-selling opportunities in large facilities, port or campus environments where expanded services and managed security programs can yield higher contract value.

Digital Footprint Current tech stack includes WordPress, analytics, SEO and standard web tooling; potential for selling modern security technology integrations, visitor management, analytics-driven security programs, and client-facing dashboards to enhance transparency.

Talent Pipeline Heavy emphasis on recruiting for security officer roles indicates a need for training, shift optimization, and workforce management solutions; present managed staffing, scheduling, compliance, and mobility solutions to improve retention and efficiency.

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

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 July 2026, Whelan Security's annual revenue is estimated to be $250M - $500M.

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 July 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.Owner: G. B.. 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 logo

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

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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