Diamond Schmitt Architects is an architectural firm founded in 1975 and located in Toronto, Ontario, Canada. Jack Diamond and Donald Schmitt are the founding principals of the firm. Born in South Africa, Jack Diamond arrived in Canada in 1964 as the Founding Director of the University of Toronto's Master of Architecture program. From 1968 to 1975, he was principal in the firm of Diamond and Myers. In 1975, he established A.J. Diamond Architects, which by 1989 had evolved into the partnership of A.J. Diamond, Donald Schmitt and Company. Canadian-born architect Donald Schmitt studied architecture at the University of Toronto, and he has been in practice with Jack Diamond since 1978.