After teaching in several colleges of Bihar, Tiwari joined
Visva-Bharati,
Santiniketan (West Bengal), an institution founded by Nobel laureate
Rabindranath Tagore and now a central university as a reader in the Department of Hindi in January, 1976. In due course, he rose to the rank of professor and became head of the Department of Hindi as well as dean of the Faculty of Humanities & Social Sciences. After final retirement in 1999 he was invited as a visiting professor in the University of Hyderabad in 2000 and Hungarian
Transylvania University (Romania)[2] in the year 2006. He served Nalanda Open University, Patna as chief co-ordinator in the Faculty of Languages for three years.
Recent work – Jo Yeh Padhe Hanuman Chalisa
Tiwari has published a comprehensive commentary on the most popular hymn of Lord Hanuman named Hanuman Chalisa with the name "Jo Yeh Padhe Hanuman Chalisa". Forty verses of the hymn have been explained so elaborately that the work has covered about 250 pages.
Distinction
He has written more than twenty books on Hindi literature.[3]
After retirement he was Prime Minister's nominee in Viswa-Bharati Court.
He assisted Union Public Service Commission in its confidential work in several capacities.
He was member of different bodies of so many universities of India.
He was felicitated by Bhartiya Hindi Parishad, a premier organization of University Hindi teachers in its annual conference held in Lucknow University in October 2011.
He delivered lectures in Refresher Courses organized by University Grants Commission in different universities.
He participated in national and international seminars organized by universities and learned institutions.
He has published a large number of research papers, critical articles, book reviews etc. in reputed Hindi journals and magazines.