text: Philip Bunker was educated at Battersea Grammar School in Streatham. He received a bachelors degree at Kings College in 1962 and earned a Ph.D. in theoretical chemistry from Cambridge University in 1965, advised by H.C. Longuet-Higgins. The subject of his Ph.D. thesis was 
  the spectrum of the dimethylacetylene molecule and its torsional barrier. During Bunker's Ph.D. work in 1963, Longuet-Higgins
  published the paper that introduced molecular symmetry groups consisting of feasible
  nuclear permutations and permutation-inversions.
  Under the guidance of Longuet-Higgins, Bunker applied these new symmetry ideas and introduced the notations G and G for the molecular symmetry groups of 
  dimethylacetylene and ferrocene, respectively. After 
  obtaining his Ph.D. degree, he was a postdoctoral fellow with Jon T. Hougen in the 
  spectroscopy group of Gerhard Herzberg at the National Research Council of Canada. 
  He then spent his entire career at the National Research Council of Canada, eventually 
  rising to the position of principal research officer in 1997.