During World War I, Mold was enrolled in the Inns of Court OTC, registration 14279 His occupation at this time was a rancher.
Cricket
As a cricketer he played for his school side, which in itself was a distinction given Dulwich College's reputation for cricket at the turn of the twentieth century. He played a number of matches for the South of Argentina vs the North of Argentina, from 21 February 1909 to 2 March 1924 and after the First World War also played in international matches for Argentina against both Chile and Brazil, opening the batting on more than one occasion.