From 1962 to 1967 he was Alfred P. Sloan Foundation fellow and in 1963 he taught chemistry at University of Pennsylvania.
He also published numerous of scientific papers and two books; Behaviour of Electrons in Atoms and Molecular Aspects of Symmetry.
[3] In 1981 he received Bourke Medal from Faraday Society and a year later became Christianson Fellow at St. Catherine's College, a division of Oxford University.
[4] From 1985 to his death he was a chair of the John Scott Advisory Panel for the City of Philadelphia.
The next year brought him Ellis Lippincott Award from the Optical Society of America.
After his death, in June 2013 he was posthumously awarded a Doctorate of Science from the University of Edinburgh.