Zenith American Solutions is the combined company of American Benefit Plan Administrators and Zenith Administrators. Zenith American is a national TPA with experience that dates back to the 1940’s. Today, Zenith American is the largest Taft-Hartley third-party administrator in the United States and operates more than 40 offices nationwide, each one focused on serving clients and participants locally through an unrivaled depth of resources and wealth of professional expertise.