Complex sentence: In the early years of their marriage, he was a banker, serving as vice president of the "Banque Nationale pour le Commerce et l'Industrie" in Paris from 1932 through 1938.
Split into simpler sentences: In the early years of their marriage, he was a banker. He was a vice president of the "Banque Nationale pour le Commerce et l'Industrie" in Paris from 1932 through 1938.