The Operation Sector comprises of 8 divisions that serve as the main core to the Malaysian Anti-Corruption Commission. They are:

• Investigation Division
• Special Operations Division
  
• Intelligence Division
• Anti-Money Laundering (AML) Division
• Forensic Technology Division
  
• Legal and Prosecution Division
• Records Management and Information Division
• Financial Analysis Division

All the divisions play a vital role in driving the functions of the operation sector, among which are investigating, gathering information, provide forensic assistance, process and manage information as well as manage case trials. The Operation sector is placed under the portfolio of the Deputy Chief Commissioner (Operation). The roles of each Division are as follows.

The Investigation Division holds the most important role in the mission to eradicate corruption by conducting investigations. The role of the Division is allocated under Section 7 (a) and (b) of the Malaysian Anti-Corruption Commission Act (MACCA) 2009.

The Special Operation Division to investigate of high-profile and public interest cases under the Malaysian Anti-Corruption Commission Act 2009 (MACCA 2009) with the use of Effective Investigation Management (EIM) and Management Team-based Investigation (MTI) to ensure investigative success to enhance public confidence in MACC’s authority as a relevant and pre-eminent anti-corruption agency.

The Intelligence Division serves as the centre for information gathering, which is carried out through diverse sources and through various up-to-date methods and techniques.

The Anti-Money Laundering (AML) Division is a division responsible for conducting investigations under the Anti-Money Laundering, Anti-Terrorism Financing and Proceeds of Unlawful Act 2001 (AMLATFPUAA). This division comprise four main branches, namely the AMLA Branch, Operation Target Branch (OTC), Forfeiture of Properties (FOP) Branch as well as the Planning and Coordination Branch (Secretariat).

The Forensics Technology Division is to provide advisory and forensic assistance aimed at continuously empowering investigation and enforcement of the anti-corruption legislation.

The Legal and Prosecution Division is tasked with conducting case trials as well as appeals in court. Prosecution is made justly and fulfils the level of evidence required by the law. In addition, the Division also reviews Investigation Papers submitted by the Investigation Division for decisions on further actions, besides providing legal advice accordingly.

The Records Management and Information Division is responsible for receiving and processing information, coordinating and managing operation/tiered documents, processing applications for integrity vetting and document disposal as well as preparing statistics on MACC. In addition to this, the Division also provides technical support and consultation to users regarding issues in computer systems.

The Financial Analysis Division is responsible in performing investigation support function in the form of providing financial analysis assistance services for complex case investigations under MACC Act 2009, AMLATFPUAA 2001, Penal Code and any other relevant applicable laws.

In addition, this Division cooperates with local and international Law Enforcement Agencies (LEA) to facilitate investigations as anti-money laundering investigations are becoming increasingly complex and involve cross-border efforts.