A strong sponsor of women's rights when she was a legislator, Mary Risteau also became a clerk of the Circuit Court for Harford County.
She served on several committees, including the Committee on Education and the Committee on Agriculture, during her time in the General Assembly, and she was a strong sponsor of women's rights. 
Risteau was also a clerk of the Circuit Court for Harford County; she was appointed in 1938 and served for one year. 
