In 1921 Pearson joined his father's Department of Applied Statistics at University College London as a lecturer. However, despite being a lecturer, his father seems to have kept him away from lecturing.
Sa 1921 Pearson sumali sa kanyang ama ng Kagawaran ng Applied Statistics sa University College London bilang isang lektor. Gayunman, sa kabila ng pagiging isang lektor, ang kanyang ama tila may alagaan sa kanya ang layo mula sa lecturing.