Robb attended Belfast Royal Academy between 1958 and 1965.
After school Robb joined BRAFP, which later became Academy Sports Club, and played rugby at senior level and cricket at very much less than senior level. Robb was Hon. Treasurer the club for almost 20 years and still maintains a keen interest. He is currently a Trustee of the Club.
Robb married his wife Heather (nee Hadden), a BRA old girl, in 1973 and both their children Ian and Caroline attended Ben Madigan and BRA before going on to university where they also graduated in engineering and are well settled in their respective careers.