First, ensure your new member has created an account on aiesec.org using a valid email address.
Step -1: Got to Committees section in EXPA.
Step -2: Select your entity using the Search Bar.
Step -3: Click on Manage Committee.
Step -4: Assign a position to the member.
Step -5: Fill up the member's details (using the same email address they used to create their aiesec.org account) and Select "Submit"