He helped prepare for Operation Torch, which landed U.S. troops in North Africa, along with Consul General Robert Murphy and Chargé d'affaires J. Rives Childs.
The Vichy government realized that he did not support its agenda of collaboration and recalled him to France with an order sent by cable from Otto Abetz and requested by Joachim von Ribbentrop.
He participated in many resistance activities, with Michel Debré in particular, and attended the August 25, 1944, meeting of the Provisory Council of the Republic at the Hôtel Matignon which set up the government that would succeed Maréchal Pétain.
When Charles de Gaulle began to question the future of French institutions, he asked Emmanuel Molnick to arrange a secret meeting with the Count of Paris.
During the summer of 1956, Monick also arranged several discreet meetings between de Gaulle and foreign heads of state, such as Mohammed V of Morocco, or political figures, such as French President René Coty.