Whelan Sfi is a national security business that is a combination of two security companies: Whelan Security and Security Forces, Inc. It services the Washington, D.C., Maryland, Delaware and Virginia area. Its mission is "to assure the delivery of real quality security service, which means that we not only focus on the means to the end, but the assurance of the end result of quality service delivery." For more information, please contact this business directly or check out the company's website.