He served as federal secretary of the National Teachers' Union [fr] and soon joined the French Section of the Workers' International (SFIO).
In February 1934, Lamarque-Cando founded an anti-fascist organization, and joined a socialist association based in Landes, serving as the latter group's secretary from September 1936.
While allied with the French Forces of the Interior, Lamarque-Cando worked within a network led by Maurice Buckmaster of the Special Operations Executive.
His political career resumed after the war, as he returned to the Sabres seat on the general council, and chaired the body from September 1945 to April 1949.
He sought election to the First National Assembly in November, and won, despite lower turnout, with the SFIO party list claiming 45,039 of 125,149 votes cast.
Upon losing his seat in the 1958 legislative elections, Lamarque-Cando focused on leading a construction cooperative, and on his career as a printer and bookseller.