Antasari started his career at the
Justice Ministry (1981–1985). His plan to become a diplomat changed after he was accepted to become a prosecutor at the
Central Jakarta State Prosecutor's Office, where he served from 1985 to 1989. Next he was appointed a prosecutor at
Tanjung Pinang State Prosecutor's Office (1989–1992). He then served as Head of the Corruption Investigation Section at the
Lampung High State Prosecutor's Office (1992–1994) and later as Head of Special Crimes at the
West Jakarta State Prosecutor's Office (1994–1996). Next, he became
Baturaja State Prosecutor (1997–1999). In 1999, Antasari joined the High State Prosecutor's Office, serving as chief investigator of the Special Crimes Sub-directorate (1999–2000). He was subsequently Head of Mass Media Communication (2000) at the High State Prosecutor's Office. It was as Chief of the
South Jakarta State Prosecutor's Office (2000–2007) that he first gained widespread attention in the mass media. In 2000, the Supreme Court sentenced former president
Suharto's youngest son
Tommy to 18 months in jail for corruption. It was Antasari's job to take Tommy to jail, but instead the former playboy was allowed to go on the run, resulting in speculation that Antasari had been paid off, although this was never proven. == Chairman of Corruption Eradication Commission ==