Indian Police Service officer Rakesh Aggarwal is listed as Director General of the National Investigation Agency (NIA). After the leadership change at the NIA in December 2025, he had earlier held interim additional charge of the agency. For exam preparation, this update helps connect a current person-post fact with an institution, a law, and the static internal-security base.

The NIA is India's premier counter-terrorism investigation agency. It was established after the 2008 Mumbai attacks under the NIA Act, 2008. Its jurisdiction extends across India for the investigation of offences related to terrorism, terror financing, and other scheduled offences. This makes the topic useful for direct prelims questions on the law under which the NIA was created, the security context behind its establishment, and the broad nature of its investigative mandate.

For RAS and UPSC-style preparation, study the leadership change alongside the NIA Act, 2008 and the agency's pan-India jurisdiction. The leadership update is the current-affairs part, while the NIA Act, 2008 and the agency's pan-India jurisdiction form the static-GK base. From a mains perspective, it is a compact example of why terrorism and terror-financing cases require a specialised investigation agency backed by a specific law and a clear jurisdictional framework. In answers, keep the factual core precise: Rakesh Aggarwal's role, the December 2025 leadership change, the post-2008 Mumbai attacks context, the NIA Act, 2008, and the agency's investigative scope.