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Whelan Security
What Does Whelan Security Do?
Whelan Security was a prominent American-owned and operated contract security services company founded in 1949 by James T. Whelan. Headquartered in St. Louis, Missouri, the company was known for its commitment to quality, customized security solutions, and a strong focus on client service and employee development. Whelan Security provided a range of security services, including uniformed officers, consulting, and investigations, primarily across the United States. In 2016, Whelan Security merged with Universal Services of America to create Allied Universal, which has since become one of the largest security companies globally. This page provides historical information about Whelan Security prior to its merger.
Where Is Whelan Security's Headquarters?
HQ Function
Served as the central command and administrative center for all national operations, strategic planning, human resources, finance, and client relationship management for its contract security services.
Notable Features:
The headquarters was a functional corporate office designed to support a large, national security workforce and operations. Specific architectural highlights are not widely publicized; its focus was on operational efficiency.
Work Culture:
Whelan Security was known for fostering a professional, employee-centric work culture rooted in its family-owned heritage. It emphasized values like integrity, respect, customer focus, and continuous improvement, aiming to be an employer of choice in the security industry.
HQ Significance:
The St. Louis headquarters was highly significant as the nerve center for a rapidly growing, respected national security firm. It coordinated services across numerous states and client sites, embodying the company's commitment to centralized quality control and operational excellence until its merger.
Values Reflected in HQ: The headquarters aimed to reflect Whelan's core values: a commitment to service excellence, a focus on people (both clients and employees), and the reliability and trustworthiness expected of a leading security provider.
Location:
Prior to its merger in 2016, Whelan Security's operations were primarily concentrated within the United States. It provided comprehensive security services, including guarding, consulting, and investigations, to a wide array of clients nationwide across various sectors. While it did not maintain an extensive independent global office network under the Whelan Security brand, its services supported national and sometimes multinational clients at their U.S.-based locations. Following the merger, as Allied Universal, the company now possesses an extensive global presence and supports a vast range of security functions internationally.
Street Address:
1699 S Hanley Rd
City:
St. Louis
State/Province:
Missouri
Country:
USA
Where Else Does Whelan Security Operate Around the World?
Chesterfield, Missouri, USA
Address: Specific historical street address not readily available post-merger. Chesterfield was a key operational area.
To manage and deliver high-quality security solutions to clients in and around the St. Louis metropolitan area and the broader Missouri region, ensuring local responsiveness.
Dallas, Texas, USA
Address: Specific historical street address not readily available post-merger.
To provide tailored security programs, manage local security personnel, and offer dedicated support to a diverse client base in the Dallas-Fort Worth metroplex and surrounding territories.
Nashville, Tennessee, USA
Address: Specific historical street address not readily available post-merger.
To cater to the specific security needs of businesses and organizations in Nashville and the surrounding Tennessee region, ensuring localized expertise and high standards of service delivery.
Buying Intent Signals for Whelan Security
Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.
Who's Leading Whelan Security? Meet the Executive Team
As of April 2025, Whelan Security' leadership includes:
Who's Investing in Whelan Security?
Whelan Security has been backed by several prominent investors over the years, including:
What Leadership Changes Has Whelan Security Seen Recently?
Not applicable. Whelan Security merged with Universal Services of America in 2016 to form Allied Universal. There have been no executive movements for Whelan Security as an independent entity in the last 12 months, as it no longer operates under that name.
What Technology (Tech Stack) Is Used byWhelan Security?
Discover the tools Whelan Security uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.
Whelan Security Email Formats and Examples
Prior to its 2016 merger and integration into Allied Universal, Whelan Security likely utilized standard corporate email formats associated with its domain, whelansecurity.com. These formats are no longer in active use for Whelan Security.
Common historical formats for companies of its era and structure might have included [first_initial][last]@whelansecurity.com (e.g., jsmith@whelansecurity.com) or [first].[last]@whelansecurity.com (e.g., john.smith@whelansecurity.com). These are speculative historical examples.
Format
dmacdonald@whelansecurity.com (Example, historical and not active)
Example
0%
Success rate
What's the Latest News About Whelan Security?
PR Newswire • July 14, 2016
Universal Services of America and Whelan Security Announce Merger Agreement
Universal Services of America and Whelan Security today announced they have entered into a definitive merger agreement. This transaction will create the leading U.S.-owned security company, with more than 140,000 trained security professionals and a strong national and local presence in all 50 states. The combined company would be the largest security company in North America. Don L. P. Whelan, CEO of Whelan Security, was slated to become Vice Chairman of the Board of Directors for the combined company, Allied Universal....more
Allied Universal (formerly ASIS anline, referencing original announcement) • August 1, 2016
Universal Services of America and Whelan Security Finalize Merger, Creating Allied Universal
Universal Services of America and Whelan Security announced the finalization of their merger, officially forming Allied Universal. This strategic move combined two major players in the security industry, enhancing service capabilities, technological offerings, and geographic reach. The new entity aimed to set a new standard for security services in North America....more
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