Callan, County Kilkenny
After completing his Leaving Certificate at St. Kieran's College, Keher later went to Ross's College in Dublin where he studied to be a bank official. He subsequently worked in the Allied Irish Bank branches in St. Stephen's Green and Capel Street in Dublin. Keher later transferred to the bank's branch in Kilkenny before becoming manager of the AIB branch in Callan, County Kilkenny.