Off-Season personnel changes began shortly before the 2023–24 season ended, with the appointment of Merijn Goris as the new general manager of the club, taking over for Martin van Geel who announced in February 2024 that he would be leaving the position on 1 July 2024.

[1] On 14 May Tom Caluwé was announced as the new technical director of the club, replacing Van Geel who was acting in the role following the resignation of Teun Jacobs in September 2023.

[3] The team further addressed to its technical staff by hiring Kristof Aelbrecht as assistant-trainer and Stefan Winters as performance coach.

In late June, the club signed their first new player to the squad, acquiring Thomas Didillon-Hödl to a two-year contract.

Four more players (Mickaël Tırpan, Cisse Sandra, Emilio Kehrer, and Kyan Vaesen) were later added from other Belgian clubs.

Willem II kicked off the season on 10 August 2024 with a 1-1 draw against 2023-24 KNVB Cup winners Feyenoord at De Kuip, followed by the first win of their return to the Eredivisie, 2-0 at home over Go Ahead Eagles.

As the primary transfer window was running down, the club added a few more desired pieces in preparation for the Eredivisie competition: attacking midfielder Amar Fatah and defenders Boris Lambert and Miodrag Pivaš.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.