Complex sentence: From humble beginnings as an assistant in his immigrant father's cigar shop, Martin begins employment as a bellboy at the Vanderlyn hotel and rises through its hierarchy through promotions, due to his reputation as a bright, conscientious worker.
Split into simpler sentences: From humble beginnings as an assistant in his immigrant father's cigar shop, Martin begins employment as a bellboy at the Vanderlyn hotel. He rises through its hierarchy through promotions, due to his reputation as a bright, conscientious worker.