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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.

Whelan Security Questions

The Whelan Security annual revenue was $100 million in 2026.

Pat Twardowski is the Chairman and CEO of Whelan Security.

744 people are employed at Whelan Security.

Whelan Security is based in St. Louis, Missouri.

The SIC codes for Whelan Security are [738, 73].

Top Whelan Security Employees

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