Complex sentence: Frey was the first architect in America to have worked directly with Le Corbusier now began working with the American architect A. Lawrence Kocher, who was also the managing editor of Architectural Record.
Split into simpler sentences: Frey was the first architect in America to have worked directly with Le Corbusier. Frey began working with the American architect A. Lawrence Kocher, who was also the managing editor of Architectural Record.