Complex sentence: He also worked for CUSO, and for Crossroads Africa in the 1960s.From 1963-66 he was Executive Assistant to Paul Martin Sr. in the Department of External Affairs and he chaired Paul Martin Sr. 's unsuccessful leadership campaign in 1968 (Sawatsky, pp.65-66).
Split into simpler sentences: He also worked for CUSO, and for Crossroads Africa in the 1960s. He chaired Paul Martin Sr. 's unsuccessful leadership campaign in 1968 (Sawatsky, pp.65-66).