For forty-nine years Walker was associated with the architecture department of the Massachusetts Institute of Technology, retiring as president emeritus in 1933. He also lectured at the New England Conservatory of Arts, of which he was one of the founders. He had designed many structures in every section of the United States and was architect-in-chief of the Omaha Exposition in 1898 and the St. Louis Exposition in 1904. He fulfilled many notable commissions in greater Boston. He was a pioneer automobile designer and had been editor of The Architectural Review. He also belonged to the National Fine Arts Commission, American Academy of Arts and Sciences, National Institute of Arts and Letters, American Federation of Arts, Boston Society of Arts and Crafts, honorary member of the Copley Society, Boston Society of Architects, and was a corresponding member of the Royal Institute of British Architects. He was one of six delegates from the United States to the International Congress of Architects in Budapest in 1930.
| period | name | type |
|---|---|---|
| American Institute of Architects | Fellow |