Complex sentence: Upon completion of his studies at the Academy of Fine Arts, he immigrated to the United States, settling in Kansas City, Missouri, where he worked as the chief designer of Tiffany's stained-glass operation.
Split into simpler sentences: Upon completion of his studies at the Academy of Fine Arts, he immigrated to the United States. He settled in Kansas City, Missouri, where he worked as the chief designer of Tiffany's stained-glass operation.