Complex sentence: After retirement from the Department of State in 2001, Simpson has been a writer and columnist for the Pittsburgh Post-Gazette and the The Blade as wall as a member of the American Academy of Diplomacy.
Split into simpler sentences: After retirement from the Department of State in 2001, Simpson has been a writer and columnist for the Pittsburgh Post-Gazette and the The Blade. He is a member of the of the American Academy of Diplomacy.