Al Kerth's job with Fleishman-Hillard put him in a position to make a difference in the community. He later became secretary of one of the firm's clients, the influential Civic Progress organization. Through those two affiliations, Kerth would have a major influence over such projects as the construction of the area's light-rail system, bringing pro football back to St. Louis and building the stadium for football,. In addition, he served as a board member for the Salvation Army, Laumeier Sculpture Park and Forest Park Forever. Former Senator John Danforth said Kerth was "St. Louis' most important civic asset."