In 1999 he was in private practice in Bangor, Maine. Upon graduation from law school, Walker served as a law clerk to Justices Atwood, Marden, and Studstrup of the Maine Superior Court for one year. Before his nomination to the bench by Governor of MainePaul LePage, he worked in private practice at the Portland, Maine, law firm of Norman Hanson & DeTroy. For approximately thirteen years he handled personal injury and products liability claims for insurance companies. He tried twenty cases to verdict.[3]
State judicial service
Walker was nominated to the state district court by Governor Paul LePage on February 7, 2014,[4] and his appointment was unanimously confirmed by the Maine Senate soon thereafter. Walker was sworn into office on May 2, 2014.[5]
On May 26, 2015, Walker was nominated to the Maine Superior Court by Governor Paul LePage.[6] He was unanimously confirmed by the Maine Senate. He was sworn in on June 17, 2015.[7] Walker's service on the state bench terminated when he became a federal judge.
Federal judicial service
Walker was recommended to the White House for a federal judgeship by U.S. Senators Susan Collins and Angus King of Maine.[8]
Walker rejected challenges to Maine's ranked-choice voting system by former Republican U.S. Representative Bruce Poliquin, who was seeking to have ranked-choice voting declared unconstitutional in order to initiate a new election after narrowly losing his seat to Jared Golden.[16]
Memberships
On his Senate Judiciary Committee questionnaire, Walker reported being a member of the Federalist Society (1997–2002), the National Rifle Association of America (2001–present), the Woodlands Club (2007–2010), Scarborough Fish & Game Club (2012–2015), and the Maine Audubon Society (2010–2015).[3]
Political activities
He was appointed by Governor Paul LePage in 2012 to serve on the Board of the Combat Sports Authority of Maine. He served on the board from 2012 to 2013.