Having retained his office of provost of the Dom after losing his episcopal title in 1466, Gijsbrecht van Brederode appointed Evert as his socius and officius as a reward for his support in the struggle with David of Burgundy. Before Gijsbrecht's death, Evert also succeeded him as provost of Sint Servaas at Maastricht (1470). In 1480 Evert was appointed vice-deacon of the Dom (vice-domdeken), and in 1482 he became treasurer of the Dom; he surprisingly retained this key post until 1500 despite his active opposition to the Prince-Bishop David of Burgundy in the Civil War of 1481–1483.