Insights

Acquisition by Garda World Whelan Security was recently acquired by Garda World Security Corporation, the world's largest privately-owned security services company. This acquisition may create cross-selling opportunities for Whelan Security to leverage Garda World's extensive global network and resources.

Large Contract Portfolio Whelan Security is one of the largest contract security companies in the United States, serving hundreds of clients across diverse industries. This indicates a strong market presence and potential for expanding services to existing clients or attracting new clients from similar industries.

Technology Integration Whelan Security utilizes a range of technology tools such as WordPress, Google Analytics, and SEO optimization. Highlighting these tech capabilities can attract tech-savvy clients seeking innovative security solutions, presenting opportunities to offer bundled services or specialized tech-driven security offerings.

Financial Stability and Scale With revenues exceeding $1 billion, Whelan Security showcases financial stability and substantial scale in the security industry. This financial strength can instill confidence in potential clients looking for a reliable and well-established security partner for large-scale projects or ongoing security needs.

Competitive Landscape Insights In a competitive landscape alongside companies like Allied Universal and AlliedBarton Security Services, Whelan Security stands out with its unique positioning, potentially offering specialized services, tailored solutions, or competitive pricing to differentiate and capture market share in the security and investigations industry.

Similar companies to Whelan Security

Whelan Security Tech Stack

Whelan Security uses 8 technology products and services including WordPress, Twitter Emoji (Twemoji), Google Font API, and more. Explore Whelan Security's tech stack below.

WordPress
Content Management System
Twitter Emoji (Twemoji)
Font Scripts
Google Font API
Font Scripts
jQuery
Javascript Libraries
PHP
Programming Languages
Yoast SEO
Search Engines
Google Analytics
Web Analytics
ShareThis
Widgets

Media & News

Garda World Security Corporation acquired Whelansecurity on Jan 1st '19.
Simpson Thacher represented Garda World Security Corporation, the world’s largest privately-owned security services company, in connection with Garda’s acquisition of Whelan Security, which operates security guard services in the United States.
May 12, 2019 | www.globallegalchronicle.com

Whelan Security's Email Address Formats

Whelan Security uses at least 1 format(s):

Whelan Security Email Formats	Example	Percentage
FLast@whelansecurity.com	JDoe@whelansecurity.com	95%
First.Last@whelansecurity.com	John.Doe@whelansecurity.com	4%
FirstLast@whelansecurity.com	JohnDoe@whelansecurity.com	1%

Frequently Asked Questions

Where is Whelan Security's headquarters located?

Whelan Security's main headquarters is located at 1699 South Hanley Road, Ste. 350, St. Louis, MO 63144, US. The company has employees across 4 continents, including North AmericaEuropeOceania.

What is Whelan Security's phone number?

You can contact Whelan Security's main corporate office by phone at

+1-314-644-****

. 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?

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

How much revenue does Whelan Security generate?

As of June 2025, Whelan Security's annual revenue reached $5B.

What is Whelan Security's NAICS code?

Whelan Security's NAICS code is 541320 - Landscape Architectural Services.

How many employees does Whelan Security have currently?

As of June 2025, Whelan Security has approximately 5K employees across 4 continents, including North AmericaEuropeOceania. Key team members include Chief Executive Officer: K. M.Chief Financial Officer: B. G.Chief Information Security Officer: D. H.. Explore Whelan Security's employee directory with LeadIQ.

What industry does Whelan Security belong to?

Whelan Security operates in the Security and Investigations industry.

What technology does Whelan Security use?

Whelan Security's tech stack includes WordPressTwitter Emoji (Twemoji)Google Font APIjQueryPHPYoast SEOGoogle AnalyticsShareThis.

What is Whelan Security's email format?

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

When was Whelan Security founded?

Whelan Security was founded in 1949.

Whelan Security

Security and InvestigationsUnited States5001-10000 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.