Dr. Vishnu is a writer, journalist and social activist, with focus on people’s rights campaign including RTI, RTE, consumer rights, MGNREGA. He is also associated with local self governance in urban and rural bodies under 73rd and 74th amendment. He has worked as lecturer in mass communication at MLC National University of Journalism, Bhopal. He also worked as Resident Editor of Hindi Daily ‘Prabhat Khabar’, Dhanbad.

In 2006, he joined RTI movement with Arvind Kejriwal and wrote a book on RTI with him as co-author. The book was published by Rajkamal Prakashan, New Delhi.
Dr. Rajgadia was also associated with Jan Lokpal Movement. He has written several books including Mass Communication, NGNREGA and Panchayati Raj. He is writing articles for various newspapers and web portals.