Complex sentence: He worked at Mercer Management Consulting where he helped firms develop growth strategies and improve operations, and then at Marsh, Inc. where he helped firms develop risk management solutions for their ongoing strategic, financial, and operational challenges.
Split into simpler sentences: He worked at Mercer Management Consulting where he helped firms develop growth strategies and improve operations. He now works at Marsh, Inc. where he helps firms develop risk management solutions for their ongoing strategic, financial, and operational challenges.