Berg was offered a linesman minor league contract (40-40) in the summer of 2015. He worked his first NHL Regular Season game in Brooklyn NY on October 15th, 2015 when the Nashville Predators were in town to play the Islanders. His teammates that night were referees Dave Jackson and Frederick L’Ecuyer while his partner on the lines was Brian Murphy. He was promoted to a full time NHL linesman status in the summer of 2016.