Complex sentence: Since 1992 Giraldi has consulted for several Fortune 500 corporate clients and written columns on terrorism, intelligence, and security issues for The American Conservative magazine, Huffington Post, and Antiwar.com and op-ed pieces for the Hearst Newspaper chair.
Split into simpler sentences: Since 1992 Giraldi has consulted for several Fortune 500 corporate clients. He has written columns on terrorism, intelligence, and security issues for The American Conservative magazine, Huffington Post, and Antiwar.com and op-ed pieces for the Hearst Newspaper chair.