Talwar studied for a BA (Hons) in Economics at Hindu College at the University of Delhi.

Subsequently, after securing an LL.B from Campus Law Centre at the University of Delhi, he studied for an LL.M in human rights law at the University of Nottingham, England, funded by a British Chevening Scholarship.

He taught LL.B students at both Delhi University and Jamia Millia Islamia over a period of six years.

[2] Thereafter, he began working for the United Nations in various capacities including as the Executive Officer of the UN Human Rights Advisory Panel in Kosovo, as the Legal Adviser to the Police Commissioner in East Timor and as the Deputy Legal Adviser to the United Nations Assistance Mission in Afghanistan.

[9] Talwar's work for children include fiction and plays for children including The Boy Who Became a Mahatma on Mahatma Gandhi, The Boy Who Fought an Empire on Subhash Chandra Bose and a play titled The Boy Who Wrote a Constitution based on the childhood of B. R. Ambedkar, the chief architect of the Indian Constitution.