Dr. Tiwari is a member of number of Government/NGO governing body. He has organized several International/ National Seminars/ Workshops. He has received Twelve National awards including UGC Fellow Award 1989, Young Scientist Award 1993, AICTE, Best Hindi Writer Award, Best Hindi Electronic & Information Technology Award MIT GOI 2004, Dr. C.V. Raman Technical Writer Award 2005 & 2006,IT Ratan Award 2008, MPCST best Team Award 2008, Anusuriyan Award 2009 and Shiksha Bharti Puraskar 2009, Vigyan Bhushan Puraskar 2010,Computer Society Of India Citation 2011
Dr. N.K. Tiwari has given IT Consultancy to M.P. State Department and NGO’s. He has also established Center for Information Science and Technology for industries under umbrella of MPCST. He acted as consultant for various Engineering Colleges during establishment.
He is coordinating the National Children Science Congress since 2008 as State Coordinator. Also, he is supporting this noble event as Editor of the Proceeding of NCSC. He has also played a remarkable role in solving Y2K Problem in the state of Madhya Pradesh in year 2000 and produced a worth-reading report on it. Some reports written by him are Remote Sensing Technique for assessment of Environmental improvement arising out of Biological Reclamation & water storage in Korba Coal fields and Narmada Watershed Prioritization for selecting site for dam construction using Remote Sensing Technique.
He has also published some very interesting and world famous technical books i.e. Data structure, Bhgolic Suchna Prnali(GIS)(Hindi), Pryavaran Ek Parichya(Hindi), Optimisation Methods, Operation Research, Computer Fundamental with Pharmacy Applications, Biostatistics and Computer Fundamentals, Paryavaran ek adyan Part I, and Paryavaran ek adyan Part II(Hindi), Basic Computer Engineering,Basic computer Science and Information Technology part one and Two (Hindi and English)
He has been Secretary of Indian Society of Remote Sensing Bhopal Chapter from 1996-2004, Member of Indian Association of Hydrologist-Roorkee, Member of Governing Body of State Resource Centre-MP, Secretary General Srijan.