From November 1999, Campbell held the post of Professor of Animal Development, Division of Animal Physiology, School of Biosciences at the University of Nottingham where he continued to study embryo growth and differentiation.
Dari November 1999, Campbell menjabat sebagai Profesor Pengembangan Hewan, Divisi Fisiologi Hewan, Fakultas Biologi Sains di Universitas Nottingham di mana ia melanjutkan untuk mempelajari pertumbuhan embrio dan diferensiasi.