*Club domestic league appearances and goals, correct as of 18:00, 8 June 2023 (UTC) ‡ National team caps and goals, correct as of 18:00, 8 June 2023 (UTC)
As a youth, Petersen was in the academy of Nykøbing in Denmark.[1] In 2019 B-67 Vice-president Finn Meinel identified him as the best young talent in Greenland.[2] In 2022, he was named to the Greenlandic Football Championship Team of the Year while playing for N-48. He scored in the final to help the club win the championship.[3][4]
From 31 January to 17 February 2023 Petersen and fellow-Greenlander Bastian Rosing went on trial with Faroese club KÍ Klaksvík through a partnership between the club and B-67.[5][6] The players had the opportunity to join the first team in the Faroe Islands Premier League or the reserve team in the 1. deild.[7] During the trial, he scored for the reserve team in a training match and spent time with the first team while Rosing was forced out through a knee injury.[8] In March 2023 it was officially announced that Petersen had signed an initial deal with the reserve squad.[9][10]
In August 2021, Greenland head coach Morten Rutkjær named Petersen to the 24-man squad that would train and compete against several Danish clubs in Denmark the following month.[13] The camp was the first of its kind after the Greenland Football Association began the process of joining CONCACAF.[14] Petersen was then part of the roster for Greenland's first match against an official national team after beginning the process of joining CONCACAF, a friendly match against Kosovo under-21 played in Turkey in September 2022.[15]
He was named to the squad again for the 2023 Island Games to be played in July of that year.[16]
