[2] Nemecz was introduced to golf at a young age by his parents and credits sibling rivalry with helping him improve his game.

[3] He was low amateur at the 2010 Lyoness Open[4] and runner-up behind Julien Brun at the 2011 European Nations Cup in Spain.

He came close to defend his title at the Gösser Open in 2018, finishing runner-up 3 strokes behind winner Santiago Tarrío, but he won the event again in 2020.

[2] Nemecz finished 10th on the Road to Mallorca Rankings in 2021 to earn a return to the European Tour for 2022, after he recorded runner-up finishes at the Italian Challenge, the German Challenge, and the Hopps Open de Provence, where he lost a playoff to Alfie Plant of England.

[2] He got off to a strong start on his return the European Tour, with a T3 at the 2022 Ras Al Khaimah Championship,[7] and finished 84th in the season rankings to keep his card.