David Rock was a hugely respected man within the Urban District Council, the community of Portadown and the Orange and Black Institutions. His greatest contribution to the town was his leadership as a senior Officer of the Ulster Special Constabulary (A Specials) during the partition of Ireland years.
Mr John Greenaway, a Roman Catholic member of the Urban Council paid public tribute to Rock for his maintenance of peace in the town for both communities.
David Rock died in October 1937 and is buried at St Saviours (The Dobbin) churchyard with the inscription ‘A true Orangeman’ on his headstone. The Rock room in Carleton Street Orange Hall commemorates him.