Ms. Mamattah initiates and conducts the prosecution of criminal cases before the courts of Ghana. She regularly works on domestic and international legal issues, as well as representing the state in criminal appeals. During her Humphrey Year, she plans to organize literacy programs using seminars, workshops, and training courses in order to help empower women. Upon returning to her country, she plans to disseminate her research findings in order to fight domestic violence.

Ms. Mamattah holds degree in law from the Ghana School of la, Accra as well as the University of Ghana.