Nils Rossen

Nils Rossen (born 1 August 2004) is a Dutch professional footballer who plays as a midfielder for club Telstar.

Career Early years Rossen was born in Wijchen, Gelderland. As a child he played for local amateur club Alverna, and in 2013 – at age eight – he joined the Voetbal Academie NEC, the youth academy of NEC.

NEC Developing at NEC, Rossen progressed through the youth teams to the under-21 squad. In December 2021, at age 17, he signed his first professional contract with the club, a deal running until 30 June 2024. He was occasionally involved with the first team and was invited to NEC's mid-season training camp in Spain in early 2022.

Rossen made his senior debut for NEC on 1 September 2023 in an Eredivisie away match against Sparta Rotterdam, coming on as a substitute in the 76th minute for Lars Olden Larsen. Over the 2023–24 season, he made a total of four first-team appearances for NEC – three in the Eredivisie and one in the KNVB Cup – totaling only 29 minutes of playing time. NEC had an option to extend his contract by one year but chose not to exercise it, as the club's technical director Carlos Aalbers felt Rossen's development had been inconsistent.

Telstar After leaving NEC, Rossen went on trial with second-tier Eerste Divisie club Telstar. He impressed during the trial period, and on 8 August 2024 he signed a contract with Telstar for two seasons with an option of a third year. Telstar's technical manager Peter Hofstede noted that Rossen had left a very good impression during his trial and expressed confidence that the midfielder could become an important player for the team. Later that year, on 31 October 2024, Rossen scored his first professional goal, finding the net in Telstar's 3–0 win over Helmond Sport in the first round of the KNVB Cup. By that point, he had also contributed three assists in league play during his initial months with Telstar. He featured in all of the club's subsequent play-off matches, including a 2–2 draw and 3–1 victory over Willem II in the final round, which secured Telstar's promotion to the Eredivisie for the first time in 47 years.

On 28 September 2025, he scored his first Eredivisie goal, finding the net in a 4–2 home win over Go Ahead Eagles.

Style of play Rossen is a left-footed midfielder.