[1][3] He held the position of Standing Junior Counsel to the Advocate General from 2012 to 2021.
He held the position of ad hoc Advocate Depute in 2015.
[1][2][3] As sheriff, Duthie's cases included various issues of dangerous driving, drugs, car chases, stalking, sexting, domestic abuse, drug smuggling, drug dealing, theft, suicide attempts and various issues of violence.
[1][2][3] Duthie was a Lieutenant of the Royal Naval Reserve,[3] and is now on the Retired List.
He was appointed legal adviser to the European Union Naval Force in 2010, and served in the Volunteer Reserves in 2015.