In 1832, he defended Charlotte Williams, an African American teenager accused of poisoning five children in the home where she worked as a housekeeper.
[3] Park also represented Suffolk County in the Massachusetts General Court for over a decade and was a member of the Boston Common Council in 1835.
[2][4] On February 4, 1852, Park was appointed Suffolk County district attorney by Governor George S.
[6] In 1874, Park was appointed clerk of the Suffolk Superior Court following the death of Henry Homer.
He was appointed to a judgeship on the Newton district court by Governor John Davis Long.
[2] In the 1888 United States presidential election, Park broke with the Republican Party in favor of Democratic incumbent Grover Cleveland.