Complex sentence: He was a Senior Research Scientist at the Honeywell Research Center from 1961to 1968, and at Queen Mary College, becoming the Chairman of the School of Engineering, and Dean of Engineering.
Split into simpler sentences: He was a Senior Research Scientist at the Honeywell Research Center from 1961 to 1968. He taught at Queen Mary College, becoming the Chairman of the School of Engineering, and Dean of Engineering.