Guru Besar Fakultas Perikanan dan Ilmu Kelautan – IPB; Ketua Umum Masyarakat Akuakultur Indonesia (MAI); Wakil Ketua Dewan Pakar ICMI Pusat; Member of International Scientific Advisory Board of Center for Coastal and Ocean Development, University of Bremen, Germany; Honorary Ambassador of Jeju Islands Province and Busan Metropolitan City, Republic of Korea to Indonesia; dan Menteri Kelautan dan Perikanan – RI (2001 – 2004).