TechGuard Security: Detailed Company Information & Corporate Profile
Summary
TechGuard Security, founded in 2000, operates from O'Fallon, Illinois and employs between 100 and 200 people. The company generates annual revenue between $10 million and $50 million.
TechGuard delivers comprehensive cybersecurity solutions, including phishing simulations, vulnerability assessments, penetration testing, IT security controls assessment, risk assessment, vendor risk management, security program development, compliance consulting, wireless access point assessment, physical security assessment, web application scanning, cloud assessment, incident response planning and tabletop exercises, security product testing and evaluation, third‑party oversight with letters of attestation, S.H.I.E.L.D. security awareness training, and social engineering assessments.
The leadership team features Chelsea Mandeville as Director of People Operations; Andrea Johnson as Chairman of the Board & Chief Operating Officer; Steve Kelly heading Technology; and specialists such as Theresa Verity, Jack Schweitzer, Audrey Harris, Erhard Haniffa, and Maxwell Stone overseeing cybersecurity strategy, contracts, compliance, and defense operations.
| TechGuard Security Website | techguard.com |
| Industries | |
| TechGuard Security Headquarters Address | 1722 Corporate Crossing, O'Fallon, Illinois, 62269 US |
| Company Size | 100-200 employees |
| Specialities & Services | cybersecurity, phishing simulator, vulnerability assessment, penetration testing, IT Security Controls Assessment , Risk Assessment, Vendor Risk Management, Security Program Development, Compliance Consulting, Wireless Access Point Assessment , Physical Security Assessment , Security Product Testing and Evaluation , Web Application Scanning , Cloud Assessment , Incident Response Planning & Tabletop Exercise, Security Product Testing and Evaluation, Third Party Oversight and Letters of Attestation, S.H.I.E.L.D Security Awareness Training & Phishing Simulator, Social Engineering Assessment |
| Founded | 2000 |
| Estimated Annual Revenue | $10M - 50M |
| Updated: | 2026-09-17 |
Estimated Website Traffic
The chart shows a decline in traffic to the techguard.com website. In August, traffic decreased to 1559, compared to 1629 in the previous month. The highest traffic in 2026 was recorded in July, reaching 1629 visits.
Workforce Turnover
Number of employees switched from or switched to
Departmental sample breakdown
Length of Employment
TechGuard Security's workforce includes employees across a wide range of tenure levels.
8% have been with the company for 1 to 2 years12% have been with the company for 3 to 4 years12% have been with the company for 5 to 7 years20% have been with the company for 8 to 10 years48% have been with the company for more than 11 years
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TechGuard Security Corporate Information: FAQ
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