After his 1999 ordination, the diocese assigned Parkes as the parochial vicar of Holy Family Parish in Orlando. He was transferred in 2005 to become the founding pastor of Corpus Christi Parish in Celebration, Florida. That same year, Bishop Thomas Wenski appointed Parkes as chancellor of the diocese. He also became its vicar general in 2009.[3]
Episcopal career
Bishop of Pensacola-Tallahassee
On March 20, 2012, Pope Benedict XVI appointed Parkes as the fifth bishop of Pensacola-Tallahassee. Parkes attended his first Ad Limina meeting with the pope at the Vatican prior to his consecration. Parkes was installed and consecrated on June 5, 2012, at St. Paul's Church in Pensacola, Florida. Archbishop Thomas Wenski was the consecrating prelate. Bishops John Noonan and Felipe Estévez were the co-consecrators.[5]
In May 2016, a group of parents protested the appointment of Reverend Roy C Marien as principal of John Paul II Catholic High School in Tallahassee, Florida. The parents objected to several teen novels authored by Marien that they felt were sexually explicit. In response, Parkes announced his full support for Marien.[7]
On October 17, 2018, Parkes and the diocese were named in a sexual abuse lawsuit by Mark Cattell, a Virginia resident. Cattell alleged that, at age nine, he had been abused in 1981 by Reverend Robert D. Huneke from Christ the King Parish in Tampa. In 1980, Huneke had sent a letter to the Bishop of Rockville Centre in New York, saying he had abused a boy named John Salveson years earlier in New York. On August 7, 1981, Salveson, now an adult, had written Bishop William Larkin,then Bishop of St. Petersburg about Huneke. Despite Salveson's complaints, the diocese did not removed Huneke from ministry until 1982.[9]
Parkes attended his second ad lumina visit to the Vatican in 2019. While Francis met with Parkes, the pope noticed Parkes' 6'8" height and asked if he ever played basketball. Parkes started a "View from the Top" podcast, giving an overview of the diocese, and his "Invitation to Worship" podcast, giving a quick overview of the weekly reading.