Mr Williamson was club secretary of Our Boys for many years. Along with Mr William Black, he was keen on the idea of Our Boys and East End amalgamating to form a new team in Dundee which he hoped would be elected to the Scottish First Division. When Dundee F.C. was formed he become its first club secretary, later becoming both vice-chairman and chairman as well as a director.
When the whole committee was forced to stand down after a disastrous season 1896-97 it was felt very unfair on Mr Williamson who had helped save the club when its future was far from secure financially. When the new board was elected, he was installed as vice-chairman.
February, 1904, saw a celebratory evening held for Mr Williamson, honouring his twenty years of service to sport in Dundee.
Apart from football Mr Williamson was very keen on athletics and swimming, he had been secretary of the Belmont Swimming Club, and was a keen supporter of Victoria Cricket Club. He also acted as chairman of the Forfarshire & Charity Association.
He died, aged sixty, on 22nd January 1922 at his residence, 114 Hawkhill, which he shared with his niece. He had never married. Although not keeping good health, he still carried on business at his tobacconist’s shop in West Port, whilst still holding the position of vice-chairman with Dundee. The burial took place in the Eastern Cemetery which was attended by club officials and players.