1. Mathematics in Industry: Challenges and Frontiers, organized by Office of International Affairs (OIA), The Maharaja Sayajirao University, Baroda, India, June 3, 2020. 
  2. Focusing on Mathematical Models &  Analysis of COVID-19 Crisis, organized by The Office of International Affairs, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India and Lappeenranta University of Technology, Finland, June 17-18, 2020.
  3. One World Optimization Seminar (OWOS), organized by Radu Ioan BoČ› (University of Vienna), Shoham Sabach (Technion - Israel Institute of Technology Haifa) and Mathias Staudigl (Maastricht University) (June 1, 2020; June 8, 2020; June 15, 2020; June 22, 2020; June 29, 2020; July 6, 2020; July 13, 2020; July 20, 2020; July 27, 2020; September 7, 2020; September 14, 2020; September 21, 2020; September 28, 2020; November 17, 2020; April 12, 2021; April 19, 2021). 
  4. Annual Meeting of the Alexander von Humboldt Foundation, Berlin, Germany (June 24-25, 2020). 
  5. Web of Science webinar: Supporting COVID-19 research efforts: How to make your search strategies more effective and efficient?  (25 June 2020).
  6. Sudoku: Fun and Serious Mathematics, Organized by the Office of International Affairs, The Maharaja Sayajirao University of Baroda, India and TU Eindhoven, The Netherlands (July 3, 2020). 
  7. Seminar: Operations Research Tools to COVID-19 for Sustainable Future, organized by Operations Research Society of Nepal (ORSN) (July 11, 2020). 
  8. IFORS Global Webinars (ALIO, July 29, 2020; APORS November 30, 2020; EURO, September 30, 2020). 
  9. DAAD-Freundeskreis International Language Caf\'e, Heidelburg, Germany (August 1, 2020).
  10. Invited talk: Network Optimization Techniques for Efficient Emergency Planning. International Webinar on Role of Applied Sciences in Industry and Engineering, organized by Department of Mathematics, Osmania University, Hyderabad, India (May 2-5, 2020).
  11. Session chair: International Webinar on Recent Advances in Pure and Applied Mathematics (RAPAM-2020), August 24-25, 2020. Organized by Department of Mathematics, KURSEONG COLLEGE, DARJEELING. 
  12. Webinar: DAAD (German Academic Exchange Service) Information Session (Tribhuvan University - Study and Research in Germany, August 28, 2020), conducted by DAAD India. 
  13. Webinar: "Merging Dynamics with Data: A mathematical perspective on climate science", organized by Institute of climate change research, The Maharaja Sayajirao University of Baroda, August 29, 31, September 5, 2020.
  14. Invited Webinar talk: Optimization Methods for Efficient Evacuation Planning, International Conference  on Computational Sciences: Modeling, Computing and Soft Computing (CSMCS-2020), organized by National Institute of Technology, Calicut, INDIA, September 10-12, 2020. 
  15. Panelist,  Pre-APORS Conference 2020 OR: Continuing Relevance in Challenging Times, September  23-25, 2020, organized for APORS by the OR Society of the  Philippines (ORSP).
  16. Invited talk: Network Flow Models and Algorithms with Emergency Location and Logistics; IFORS Global Webinar Series, O.R. in the Asia Pacific: Recent Trends and Practices, September 30, 2020.   
  17. Coordinator, 1st Virtual Southeast Asian Study Group Meeting on Industrial Problems, organized/ collaborated by Nepal, Germany, UK, Finland, Thailand, Malaysia, India  and other SAARC countries  (VSEASGMIP2020),  to be hosted by Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India, October 12-16, 2020. 
  18. DAAD online meet, Connecting Germany and South Asia–Fostering Partnerships in Higher Education, organized by DAAD New Delhi  in association with DAAD Bonn Section P24 – Cooperation Projects and University Grants Commission (UGC), Govt. of India, October 29-30, 2020. 
  19. Participated "DAAD Alumni Programmes", organized by DAAD South Asian Regional Office New Delhi, India, November 6, 2020. 
  20. Invited plenary speaker, MINDANAWAN MATH-STAT International Webcon (Strengthening Mathematical and Statistical Competencies through Convergence in the New Normal),  Quickest Flow Improvement with Network Reconfiguration (organized by MSU-IIT, Mindanao, Central University,  Mathematical Society and Southern Society of Theoretical and Applied Statistics at Philippines, November 4, 11 and 18, 2020). 
  21. Participated at Webex, Transnational Education - Insights into the international discourse and global trends, organized by DAAD regional office New Delhi, November 18, 2020. 
  22. Invited plenary speaker and international advisor: Flow Improvement Strategy using Lane Reversals on Evacuation Network, 2nd International Conference on Emerging Trends in Mathematical Sciences $\& $ Computing (IEMSC-21), February 5th-7th, 2021, Calcutta, India. 
  23. Participated at 2nd International Day of Mathematics (IDM) on March 14, 2021, organized by Bangladesh Mathematical Society (BMS). 
  24. International Alumni event ("DAAD alumni work despite/defies Corona", organized by ADIT: Info talk on - Nepal-German Academic Association (NEGAAS) and DAAD-Alumni Activities, May 28, 2021; June 11, 2021). 
  25. Participated: COVID-19 and Public Health Crises: Updates and Appeals from Nepal" Initiated by "the Commission for Educational Exchange between the United States and Nepal and by the Fulbright Alumni Association of Nepal" (also co-sponsored by Nepal-German Academic Association -NEGAAS), June 8, 2021. 
  26. Participated: International Symposium on Locational Decisions (ISOLDE XV), University of Wuppertal, Germany (5-9 July, 2021). 
  27. Participated: 5th International Conference on Dynamics of Disasters, DOD 2021, Greece (July 16-18, 2021).