Jona Niemiec

Early and personal life Niemiec was born in Lüdenscheid, North Rhine-Westphalia. His father, brother and uncle were all involved in local football. He is of Polish origin.

Niemiec began playing football in his hometown as a youth for LTV 61 and SD Lüdenscheid, before joining Rot-Weiß Lüdenscheid. In the summer of 2020, he was about to join the latter club's senior team, but instead chose to sign for TSG Sprockhövel in the fifth-tier Oberliga Westfalen. His first year as a senior was abandoned due to the COVID-19 pandemic, but earned him trials at professional clubs Rot-Weiss Essen, SC Freiburg and FC Schalke 04 before he opted for Fortuna Düsseldorf. Aged 19, he left his job at plumbing manufacturer Flühs Drehtechnik.

On 8 February 2023, Niemiec made his professional debut in the DFB-Pokal round of 16 away to 1. FC Nürnberg. He came on as a substitute in added time for goalscorer Dawid Kownacki with Fortuna winning 1–0, but they conceded an equaliser and the game went to extra time. In time added onto extra time, he was fouled by opponent Florian Flick, who was sent off. The game went to a penalty shootout, in which he was the only player to miss, his attempt being saved by FCN goalkeeper Peter Vindahl Jensen.

Four days after his cup debut, Niemiec played his first 2. Bundesliga game, again as a substitute. He assisted the second goal of a 2–0 win at home to SV Sandhausen, scored by Rouwen Hennings. He played 12 games in his first league season, scoring once on 24 February to conclude a 3–1 win over Eintracht Braunschweig at the Merkur Spiel-Arena in his third match.

In the summer of 2023, Niemiec wanted to transfer to a club in the 3. Liga due to a lack of playing time, but his move did not come to fruition. On 5 December, in the last 16 of the cup, he came off the bench with five minutes remaining and scored both goals of a 2–1 win at 1. FC Magdeburg; his contributions earned the club €1.7 million in prize money. Fortuna came third in the 2023–24 2. Bundesliga and contested the promotion/relegation playoff against VfL Bochum, surrendering a 3–0 away win from the first leg as the game went to penalties; Niemiec came on as a substitute and scored his attempt while his team lost in sudden death.

Odense Boldklub On transfer deadline day, 1 September 2025, Niemiec transferred to the Danish Superliga club Odense Boldklub on a deal until June 2028.