[4] At the age of 24, Cardinal Joseph Van Roey brought Ugeux at the helm of the catholic newspaper Le Vingtième Siècle.
By the outbreak of the Second World War, he entered the Belgian Resistance through the intelligence network Service de renseignement Zéro.
He left Belgium for London in March 1943, where he became the director general of the Intelligence and Actions Service (Fr.
Minister of the Colonies Auguste Buisseret proposed Ugeux to lead the public information institute for the Congo and Rwanda-Urundi INFORCONGO.
After Congolese independence in 1960, Ugeux proposed Minister for Foreign Affairs Pierre Wigny to found a Belgian institute for Information and Documentation (INBEL), which he will lead until 1975.