Complex sentence: He transferred to the Physics department in 1964 and received his doctorate in 1964, remaining at the university as a senior research assistant from 1970 till 1979, having in 1978 produced his on a topic in theoretical physics.
Split into simpler sentences: He transferred to the Physics department in 1964 which was also the year in which he received his doctorate. He remained at the university as a senior research assistant from 1970 till 1979, having in 1978 produced his on a topic in theoretical physics.