April 22, 2016 | WEBBIZ Fr. John Grant, associate pastor at Holy Family Cathedral in Tulsa, OK, speaks on Practical Purity at the weekly series ‘Wednesdays at the Cathedral’. For more information about the event and events upcoming, visit here. Bishop Slattery announced the appointment of Father John Grant as Associate Pastor of Holy Family Cathedral, effective May 12, 2015, serving under the newly appointed Rector, Father Jovita Okonkwo. Father Grant is also appointed Assistant Director of the Diocesan Office of Liturgy and Assistant Master of Ceremonies assisting Msgr. Patrick Brankin, Director of Liturgy.