Hudson was Art Director for KG Murray's Man Junior in it's first year (1938) and provided some illustrations for stories.

In 1940, he established an agency, Packard Advertising & Publishing Company (26 O'Connell Street, Sydney), with Eric Grenville Holt and Lindsay R. MacNicol. Radio was to be one of this firm's specialities.

During the second world war, Hudson was official war artist with the British Pacific Fleet. Around this time, he worked for the Sun for three years as creative artist, and for the Sydney Morning Herald later in the forties (see some of his art in SMH 8 December 1945).

With Eric Holt, Ladd-Hudson edited the publication All in Fun. Including contributions from many of Sydney's leading artists and writers, it was published by the National Welfare Publications Committee in aid of the (Sydney) Lord Mayor's Patriotic and War Fund. (The Sun, 3 July 1940).

In 1948, Ladd-Hudson collaborated with architect Athol Kerr and Public Relations Officer C. W. Judd for a Sydney Town Hall exhibition on the Cumberland County Council Town Planning Exhibition, 'the biggest exhibition of its kind yet seen in the Southern Hemisphere' (The Sun, 7 August 1948).