Prince Michel started civilian life at the age of 20, engaging in business over the following decades. He worked for a company that had created the Zodiac inflatable rubber boat, which enjoyed huge commercial success after the war. Later, he negotiated contracts for French companies with Mohammad Reza Pahlavi, Shah of Iran, until he was deposed in the Islamic revolution of 1979. In later life he lived between his house in Neuilly-sur-Seine, France and his house in Palm Beach, Florida.