Dr. Nayak has completed PhD in International Politics from Jawaharlal Nehru University. He was Visiting Fellow to PRIO, Oslo, from June 6 to July 7, 2006 and July 2007. He did a special course on Peace Research in International Summer School from Oslo University in 2007. He has been Visiting Faculty to the Center for the Study of Nepal, Faculty of Social Science, Banaras Hindu University in 2011. He has been Guest Faculty to Lal Bahadur Shastri National Academy of Administration (LBSNAA), Mussoorie since September 2006. He has published a book named "Strategic Himalayas: Republican Nepal and External Power. He has also edited a book and published various journal  articles. 

His area of expertise are Nepal, Bhutan, Left wing extremism/Maoist Conflict and coperative security in South Asia.  He is also an associate fellow of Institute for Defense Studies and Analysis (IDSA)