[2] Neeraj Kumar belonged to 1976 batch and AGMUT (Arunachal-Goa-Mizoram and Union Territories) cadre and has recently completed his tenure as the Chief Advisor to the BCCI for their Anti Corruption & Security Unit (ACSU).

Subsequently, as DCP/South, he cracked the serial crimes being committed by an erstwhile criminal tribe wherein victims were being bludgeoned to death in their sleep and looted there after.

In 1993, Kumar was promoted to the rank of Deputy Inspector General of Police after which he was on deputation with the Central Bureau of Investigation till 2002.

As the Director General (Prisons) he introduced several measures such as "Padho aur Padhao" (First learn yourself and then teach others) and "Sparsh" for the welfare of jail inmates.

As DCP/South, he is remembered as a people friendly DCP, who cracked the serial crimes being committed by members of an erstwhile criminal tribe in which citizens were being bludgeoned to death in their sleep, and, thereafter, looted.

On promotion to the rank of Deputy Inspector General of Police in 1993, he proceeded on deputation to the Central Bureau of Investigation where he served until 2002.

Under his leadership, the Special Task Force (or STF, created in the CBI to investigate the case) arrested seven members of the Memon family and sixteen other absconders.

[6] which occurred on the first anniversary of the Babri Masjid demolition in various prestigious trains, and unearthed a terrorist outfit called Ahle Hadees.

His tenure in the CBI is also highlighted by the solving of the Meenakshi Amman Temple blast case, the unearthing of the UTI Scam, the arrest and deportation of American Cultural Centre attack mastermind Aftab Ansari from Dubai, the arrest of Abdul Lateef, a notorious underworld don of Gujarat; Romesh Sharma, a Dawood Ibrahim henchman masquerading as a politician based in Delhi; the cracking of the cricket match fixing scandal in 2000.

These included the encounters at Ansal Plaza,[15] Tughlaqabad Fort,[16] Deenpur Village in Najafgarh, Millennium Park and Lotus Temple.

He masterminded the arrest of Tariq Ahmed Batlo, a Pakistan trained Kashmiri terrorist, who was tasked with an assignment to cause Bali like bombings in Goa.

As Director General (Prisons) where, besides toning up the jail administration, he introduced several innovative measures like a literacy programme called "Padho aur Padhao", in collaboration with the National Literacy Mission Authority, which brought down illiteracy amongst jail inmates substantially; campus placement for reformed prisoners in which nearly four hundred inmates given jobs.

During his tenure as the CP, Kumar and his police force exposed the scam of spot fixing in the sixth edition of the Indian Premier League (IPL 6) of cricket.

In February, 2012 he was invited by the U.K. Government to share his experiences of organizing the security arrangements during Commonwealth Games 2010 for the benefit of the U.K. Police.