In 1992, having decided to become a priest, Parkes entered the St. Vincent de Paul Regional Seminary in Boynton Beach, Florida, receiving a Master of Divinity degree.
[3] Parkes is fluent in Spanish, having studied it in high school, college, and seminary, plus during a six-week language immersion course in Costa Rica.
[2] During his time in Orlando, Parkes was also a member of the Investment Committee and, starting in 2019, a spiritual director to the Catholic Foundation of Central Florida.
[11] In May 2022, Parkes contacted the Vatican Dicastery for Divine Worship and Discipline of the Sacraments, requesting permission to continue the Traditional Latin Mass in the diocese.
[14]Within the US Conference of Catholic Bishops, Parkes is a member of the Committee on Pro Life Activities and the Subcommittee on Native American Affairs.