On 1 March 2020, Geldiyev made his debut in the 2020 Malaysia Super League in a 0–0 draw against Sabah FA.
[7][8] In March 2021, Serdar Geldiýew signed a deal at his former club FC Ahal.
Geldiýew made his debut for the Turkmenistan senior national team in 2008, friendly match against Oman.
[11] [12][13][14][15][16] In December 2024 he was appointed as General Secretary at the Football Federation of Turkmenistan.
Younger brother, also a footballer for the Turkmenistan national team, Ata Geldiýew.