Liefering In January 2015, Ati-Zigi joined
Red Bull Salzburg from Ghanaian feeder club
Red Bull Ghana. Ati-Zigi was immediately loaned out to
reserve team FC Liefering who play in the
Austria 2. Liga. After his debut, he went ahead to play in six consecutive league matches. At the end of his first season, he played six league matches with Liefering finishing in second place in the
2014–15 Austrian Football First League. In total he featured in 33 matches for Liefering in this two year stint.
Sochaux In July 2017, Ati-Zigi joined French team
FC Sochaux-Montbéliard on a three-year deal reuniting with his former coach
Peter Zeidler from Liefering and Red Bull Salzburg. He made his club debut in the first round of the in a
Coupe de la Ligue on 8 August 2017 against
Valenciennes which ended in a 3–1 loss. Over the season, he remained as the second choice goalkeeper behind
Maxence Prévot being named in the match day squad for the 24 consecutive times. On 9 February 2019, seven months after signing for the club, he made his
Ligue 2 debut against
Stade de Reims after coming on as a substitute in the 58th minute for Prévot who sustained an injury; Ati-Zigi conceded two goals as Souchaux lost 3–0. Afterwards he kept the post for the next five league matches, keeping a clean sheet in one. At the end of his first season with
Montbéliard side he had made 12 appearances. Out of the 12 appearances, four of those were in
Coupe de France, for which he was the main goalkeeper. They were eliminated in the
round of 16, after losing to defending champions
PSG by 4–1. In the 2018–19 season, Ati-Zigi remained the second choice goalkeeper behind Prévot. He played his first league match of the season on 22 December 2018, keeping a clean sheet in their 1–0 over
Lorient.
St. Gallen On 16 January 2020, Ati-Zigi joined Swiss-club
FC St. Gallen on a two and half-year deal with his contract set to expire in June 2023. Ati-Zigi made his debut for the club against
FC Lugano in a
Swiss Super League match on 26 January, helping the club to a 3–1 victory. On 26 October 2020, in a league match against Lugano, Ati-Zigi was subjected to intense racist chants from the opponent's fan base. After the match, Lugano issued a statement and apology via social media to St. Gallen and Ati-Zigi stating – “We would like to apologize to FC St. Gallen and the player. There must be no place for racism. The club will do its best to find those responsible." On 14 September 2022, St. Gallen announced that Ati-Zigi had signed a new two-year contract that will keep him at the Swiss club until 2025. On 25 October 2022, Ati-Zigi played his 100th Swiss Super League match, in a 1–1 draw against
Servette. Prior to that he had played his 100th match in all competitions against
Sion on 10 September. ==International career==