Upon earning his master's degree from Oxford University, Twelftree went on to study under world-renowned New Testament scholar James D. G. Dunn at the University of Nottingham.
Setelah meraih gelar master-nya dari Universitas Oxford, Twelftree mendapatkan pembelajaran di bawah bimbingan sarjana Perjanjian Baru terkenal di dunia James D. G. Dunn di Universitas Nottingham.