Bonjour Khush !
The position of object pronoun in sentences with a conjugated verb + infinitive is:
conjugated verb + le, la, l', les + infinitive
See our related lesson:
https://french.kwiziq.com/revision/grammar/position-of-object-pronouns-in-sentences-with-infinitives
If you mean a verb conjugated in a coumpound tense, it will be:
le, la, l', les + auxiliary verb + past participle
See our related lesson :
https://french.kwiziq.com/revision/grammar/position-of-object-pronouns-with-verbs-in-compound-tenses
Bonne journée !