Sh Amitav belongs to 1990 batch of Indian Revenue Service. He is a Post Graduate from Delhi University and has a Law degree (LL.B) and a Post Graduate Diploma in Cyber Laws from NALSAR University of Law, Hyderabad. During his initial posting in Patna he handled Fodder Scam Investigation and Assessments. He held senior faculty position at National Academy of Direct Taxes, Nagpur from 2001 to 2006. His area of interest has been Investigation and Risk Assessment. He was a member of the core team that worked on the design phase of Business Process Re-engineering (BPR) Project for the Income-tax Department from 2006 to 2009.

In 2009 he joined Financial Intelligence Unit-India (FIU-IND) as Additional Director and looked after various functions including policy matters relating to changes in PMLA and Rules. He was involved in the Mutual Evaluation process of India in 2010 from FIU. He represented FIU-IND in FATF Plenary Meetings at Paris and Working Group meetings of Egmont Group in different countries. During his tenure in FIU-IND, he gained deep insight into the working of Indian financial sector and the regulatory practices. After completing his deputation in June 2014, he reverted to his parent organisation and worked in Central Board of Direct Taxes as CIT (Investigation) OSD under Member (Inv.) where he was involved in overseeing and monitoring enforcement action by the Investigation Directorates in the country. In 2017, he was posted as Additional Director General in the Directorate of Risk Assessment under CBDT and worked on risk-based selection of cases based on Country-by-country Reporting (CbCR), Common Reporting Standard (CRS) Reports and other databases.

With keen interest in Blockchain technology he has closely monitored the bitcoin market in India in the post-demonetization period and represented CBDT in the Inter-departmental Committee constitute by Department of Economic Affairs (DEA) on “Regulation of Virtual Currencies in India”. He has also written a book on Investigation of Bitcoin Transaction for the guidance of officers posted in the investigation Directorates of ITD in 2017. In 2021, he was posted as Principal Director (Investigation), Mumbai and conducted some remarkable searches in the Insurance and mutual fund industry and Online Gaming sector. He was posted as Director General (Systems), Delhi in September 2023 and is currently spearheading critical IT Projects of the Income-tax Department.