Résumé

Draftsman, City of Saint Louis, Building Department, Saint Louis, MO, c. 1885.

Deputy Commissioner, City of Saint Louis, Building Department, Saint Louis, MO, c. 1888.

Partner, Barnett and Haynes, Architects, Saint Louis, MO, 1889-1895.

Partner, Barnett, Haynes and Barnett, Architects, Saint Louis, MO, 1895-1911.

Haynes's father-in-law was the Saint Louis architect, Goerge I. Barnett (1815-1898); he formed a partnership with his brother-in-law, George Dennis Barnett, c. 1889.