Whelan Security Information
Summary
Whelan Security is a private company that has been in the industry for 77 years. The company currently specializes in the Security and Investigations, Business Support Services areas. The position of the President is occupied by Greg Twardowski. Its headquarters is located at Saint Louis, Missouri, USA. The number of employees ranges from 5.0K to 10K. The annual revenue of Whelan Security varies between 100M and 500M. To connect with Whelan Security employee register on SignalHire.
Organization Website | whelansecurity.com |
Social Links |    |
Phone Number | 314-644-3227 |
Industries | |
Headquarters Location | 1699 South Hanley Road, Ste. 350, St. Louis, MO, 63144 US |
Employees Size | 5000-10000 employees |
Specialties | Uniformed Security Services, Event Services, Disaster & Emergency Response Services, Strike & Labor Dispute Services, Patrol & Alarm Response Services, Temporary Security Services |
SIC Code | 7380 |
DMA Code | Greater St. Louis Metropolitan Area |
Founded | 1949 |
Estimated Annual Revenue | $100M - 500M |
Operating Status | Acquired |
Competitors
Founded | Type | Employees | Revenue | Funding | |
|---|---|---|---|---|---|
| 1976 | - | 100 - 250 | 42.2M | $150K | |
| 1901 | Public Company | 100K - 9.9M | 9.4B | $0 | |
| 1973 | Privately Held | 100 - 250 | 32.4M | $0 | |
| 1955 | Privately Held | 5.0K - 10K | 1.5B | $0 |
Employees Turnover 4 quarter 2025
Number of employees switched from or switched to
Length of Employment
Employee tenure at Whelan Security shows a diverse range of experience levels:
1% for 1–2 years1% for 3–4 years6% for 5–7 years28% for 8–10 years64% have over 11 years of service at Whelan SecurityEx-employees positions
Similar Companies
FAQ
Data Privacy
GDPR COMPLIANT
SignalHire complies with the General Data Protection Regulation (GDPR). SignalHire follows GDPR requirements, including but not limited to rights of data subjects to access, correct, or delete their personal information and supports the right to be forgotten.
CCPA COMPLIANT
SignalHire is CCPA-compliant and provides California residents the right to know, access, opt out, and request deletion of their personal data.
