[1][2] Nettey began his career at Division One League side Attram De Visser Soccer Academy, before joining Accra Great Olympics on loan along with 9 players from the club including Godfred Odametey in the 2017 season.
[6] In December 2019, Asante Kotoko announced that they had signed him from Accra-based club Attram de Visser Soccer Academy on a three-year contract.
[7][8] On 22 December 2019, he won his first trophy with the club, after Asante Kotoko defeated their rivals Hearts of Oak by 2–1 victory in the President's Cup.
In November 2020, after Harrison Afful withdrew due to injuries, Nettey received his first call-up to the Ghana national team for a double-header 2021 AFCON qualifiers against Sudan.
[12][13] On 12 November, he made his debut against Sudan in the 2021 AFCON qualifiers Group C match at the Cape Coast Sports Stadium, starting in the right-back position as Ghana won 2–0.