Complex sentence: Her mother Emmy (maiden name-Montoya) worked at Universal Studios for thirty years, starting in the legal department, and working her way to assistant to the president of talent, Peter Terranova, and then for the president of television, Erv Sepkowitz.
Split into simpler sentences: Her mother Emmy (maiden name-Montoya) worked at Universal Studios for thirty years starting in the legal department. Emmy worked her way up to working for the president of talent, Peter Terranova, then the president of television, Erv Sepkowitz.