Ahsanallahu Ilaikum Ustadh, is it permissible to work in sales (as setter/closer/etc.) for a halal business (e.g., business courses) if their packages may include Islamic courses from mubtadi’ people? JazakAllah Khair.

Ustadh AbdulAziz al-Haqqan
If he is truly a mubtadi' and you are promoting him this is not allowed