IAPS is a large organisation and can not be run just by the Executive Committee(EC). For this purpose there are several working groups in various areas and they consist of IAPS members who devote their free time to help the EC on the day to day work of IAPS. They are volunteers and now you have a chance to become an IAPS volunteer!
Multiple opportunities are open and you do not want to miss this chance! Volunteering and gathering experience in student associations is very recommended, it may even help you when you apply to your first job! You can be an enthusiastic beginner, an experienced pro in organisation duties or anything in between. What is important is to have an open mind, good work ethics, the will to help and learn by doing.