Professor Muljono is a clinician who also works in the arena of basic biomedical research. He joined the Eijkman Institute for Molecular Biology in Jakarta in 1995 as the head of the hepatitis unit, and has been carrying out basic and translational researches in viral hepatitis. He is also actively involved in international and national activities targeted to public health in the prevention and control of viral hepatitis and emerging diseases. On July 1, 2011, he was awarded the title Academy Professor in Life Science by the Royal Netherlands Academy of Arts and Sciences (KNAW) and the Indonesian Academy of Sciences (AIPI). On 30 November 2011, Professor Muljono was inaugurated as the Academy Professor Indonesia in Hasanuddin University, Makassar, which is the host university where he is considered as Guru Besar Luar Biasa. He was also awarded the title Honorary Professor from Sydney Medical School in September 2011. In 2014, he was assigned as a member of the Strategic and Technical Advisory Committee in Hepatitis (STAC-Hep) to the Director General of the World Health Organization (WHO). He is now the Chairman of the National Expert Committee for Hepatitis.