TORONTO: APJ Abdul Kalam was so much respected in Canada that the current Governor-General David Johnston delayed his oath-taking in 2010 so that he could personally - as president of the University of Waterloo - confer an honorary doctorate on the former Indian president.
In the context of the input sentence, determine the relationship between 'David Johnston' and 'University of Waterloo'.
Options: creator, chief executive officer, publisher, employer