[3] On 30 May 2016, Seuntjens moved to AZ, after an impressing 2015–16 season with NAC where he scored 13 goals and made 14 assists in 35 appearances in the Eerste Divisie.

[2] He made his debut for AZ on 28 July in a Europa League qualifier against Greek club PAS Giannina, coming on as a 87th-minute substitute for Joris van Overeem in a 1–0 home win.

[5] On 1 July 2019, Seuntjens signed a two-year contract with Turkish Süper Lig club Gençlerbirliği after having lost his spot in the AZ starting eleven under new head coach Arne Slot.

On 9 June, he signed a one-season contract with FC Utrecht, with the club holding an option to extend for one more year,[9] but returned to RKC Waalwijk on 13 January 2024.

[10] On 15 July 2024, Seuntjens moved to Spain and was announced at Segunda División side Castellón, managed by compatriot Dick Schreuder.