The end of the war in 1945 also put an end to the twelve Hitler years. Beckmann emerged as a member of the leadership team of the Evangelical Church in the Rhineland, serving as president of the Rhineland between 1945 and 1949. In 1947 he was elected deputy president of the of the Evangelical Church, serving a two year term till 1949, under the leadership of . Sources suggest that behind the scenes Beckmann was a particularly influential, with respect to the church's decisions and pronouncements. Following the organisational changes of 1949 Beckmann continued to serve as deputy to Praeses till the latter's sudden death in 1957.