Even though the Kuala Lumpur President Cup Team did not manage to reach the finals, Wan Zack became the top scorer with 11 goals.
Wan Zack and 25 other Harimau Muda A players were chosen by Azraai Khor to participate in an 8-month long, training camp in Zlaté Moravce, Slovakia.
Malaysian media reported in early March 2012 that Wan Zack, along with teammate Wan Zaharulnizam Zakaria is to attend trial with Japan Football League side FC Ryukyu after impressing the Japanese side talent spotter during Malaysia's 2–0 defeat to Japan in the 2012 Olympic qualifiers match in Tosu.
[5] Wan Zack and Nazirul officially signed a two-year playing contract with FC Ryukyu in early April 2013.
Wan Zack made his full debut in a 2–1 win against Sagawa Printing, playing 80 minutes before being subbed off.
[6] Malaysian media reported in early March 2014 that Wan Zack will join Kelantan FA in April.
After succeeded in helping FELDA United to become the 2018 Malaysia Premier League champions, Wan Zack signed a one-year contract, with the option for a second year, with Selangor.
On 9 August 2023, Wan Zack got back to his phenomenal form providing a goal and an assist in a 3–1 win against Penang in the Malaysia Super League.
In the second leg of the 2023 Malaysia Cup quarter-final match on 25 September 2023, Wan Zack scored the only goal in the game against Sabah bringing the tally to 3–2 on aggregate sending the team to the semi-finals.
Wan Zack played a big role in a match against Laos in which he provided a goal and an assist to help Malaysia win 4–1 on 28 November 2012 at the National Stadium, Bukit Jalil.