He attended Thomas Carr Howe Community High School in Indianapolis and was the most valuable player on the football team.
By 1981, Fiers, whose alias in clandestine matters was "Cliff Grubbs",[citation needed] had risen to the coveted post of Station chief in Riyadh, Saudi Arabia.
After succeeding Duane Clarridge, he assumed a major responsibility for support of the Nicaraguan Contras' armed opposition to the Sandinista's Soviet-backed, Communist government.
Fiers was known for wholeheartedly supporting Adolfo Calero and Enrique Bermúdez against so-called reformers like Arturo Cruz and Alfonso Robelo.
On July 9, 1991, Fiers pleaded guilty to two misdemeanor counts of withholding information from the Congress regarding secret efforts to aid the Nicaraguan Contra rebels.
He was sentenced to one year probation and 100 hours community service by US District Chief Judge Aubrey Eugene Robinson Jr. on January 31, 1992.