Complex sentence: In 1988, Diehl joined Dallas-based International Telecharge, Inc. as Vice President of Regulatory Affairs where he was responsible for state regulatory and legislative matters and was the company's expert witness in administrative law and appeals court proceedings.
Split into simpler sentences: In 1988, Diehl joined Dallas-based International Telecharge, Inc. as Vice President of Regulatory Affair. He was responsible for state regulatory and legislative affairs and was the company's expert witness in administrative law and appeals court proceedings.