After working as a mechanic in World War I Scieur rode the revived Tour de France in 1919 placing in fourth. He had punctured four or six times, according to reports, between Le Havre and Cherbourg. The weather was foul and he had no more spares so had to huddle in a doorway to repair one of the punctures. Mending a race tyre involved taking it from the rim, cutting the stitching that held the base together, mending the inner tube, then sewing up the tyre before replacing it. Scieur had acquired a needle and thick thread from the woman in whose doorway he was sheltering but his fingers grew too cold to use them. He asked the woman to help but the chief official, Lucien Cazalis, told him: "It's forbidden to receive help; you'll be penalised if "madame" threads the needle for you." Scieur completed the repair but lost the Tour to Lambot by about the time it had taken. He rode three more years after his victory but without finishing. He came fourth again in 1920, once more behind Thys.