Abbas Di Palma, Shaykh Abbas Di Palma holds a BA and an MA degree in Islamic Studies, and certifications from the Language Institute of Damascus University. He has also studied traditional Islamic sciences in... Answered 1 year ago

as salam alaikum

to become a lawyer is permissible provided that you do not lie, cheat or support oppression and mischief against a third party.

Sometimes it may be very difficult to be "professionally clean" in certain circumstances but a Muslim is always required to behave at his best and to promote truth anywhere he is. 

With prayers for your success.