The son of Edgar Andersen and Muriel Lucy, he was born in Makkovik, Labrador and was educated in North West River. In 1975, he married Marie Delaney. Andersen was manager for the government stores in Labrador from 1974 to 1996. He was a member of the council for Happy Valley-Goose Bay.[4] Andersen served 12 years as president of the local hockey association.[5]
Andersen was released in December 2009 after serving three months of a 15-month sentence.[9]
In 2016, he won a by-election for the Happy Valley-Goose Bay town council defeating 3 other candidates.[10] He was re-elected in the 2017 municipal elections, and became Deputy Mayor. Following the death of Mayor John Hickey in December 2017, Andersen became acting Mayor of the town and was later named Mayor in early 2018.[11] Andersen announced in August 2021 that he would not be seeking re-election.[12]
Andersen was elected to the Nunatsiavut Assembly[1] in May 2022. He represents Upper Lake Melville (Happy Valley-Goose Bay, Mud Lake and North West River) and serves alongside his brother Anthony Andersen (representing Nain) and nephew Thomas Evans (representing Makkovik). Andersen defeated incumbent member Marlene Winters-Wheeler for the 2-member district (the other winner was Gerald Asivak).