Chief Secretary to the Government Ali Hamsa announced Dzulkifli Ahmad's appointment as the Malaysian Anti-Corruption Commission's (MACC) chief commissioner for a five-year tenure starting Aug. 1 in a statement Friday.

Ahmad, who is currently the national revenue recovery enforcement team director in the Attorney General's Chambers, will take over from Abu Kassim Mohamed who opted for the early resignation.

Late 2015, the MACC opened three investigation papers on Prime Minister Najib Razak over an alleged $681 million political donation and two probes into former 1Malaysia Development Bhd (1MDB) subsidiary SRC International.

Razak was, however, cleared of any wrongdoings in all the cases. The probe into SRC is still ongoing.

On Friday, Hamsa also announced that MACC Deputy Chief Commissioner Mustafar Ali will be shifted to take over as the director-general of the immigration department.

Ali was also actively involved in the anti-graft body's probe of 1MDB and the $681 million political donation.

Mohamed was appointed MACC chief commissioner in January 2010 by the Malaysian King.

He will continue as anti-corruption service officer until he reaches compulsory retirement in December 6, 2020.