1. Delivered an invited talk on "Some mathematical models for harvesting of renewable resources at an optimal level" in an International Conference on Mathematical Modelling and Simulation held at BHU, Varanasi during August 29-September 01, 2016.
2. Delivered an invited talk on “Modeling the dynamics of a fishery model with optimal harvesting policy” in the 2015 Joint meeting of the 5th China-Japan-Korea Colloquium and the 25^{th} Meeting of the Japanese Society for Mathematical Biology held at Doshisha University, Kyoto, Japan during August 26-29, 2015.
3. Delivered the following two invited lectures in a refresher course on “Mathematical Modelling and its Applications in Science and Engineering” held at Rajiv Gandhi Proudyogiki Vishwavidyalaya, Bhopal MP, during February 02-06, 2015:
(i) Linear and Non-linear Dynamics of Population
(ii) Optimal Resource Utilization Models
4. Delivered an invited talk on “Role of Mathematical Modeling in Resource Management” organized by Indo-French Centre for Applied Mathematics at IISc. Bangalore during July 28-31, 2014.
5. Delivered an invited talk on “Modeling the optimal utilization of a renewable resource” at Beant College of Engineering and Technology, Gurdaspur, Panjab, in a National Conference on “Recent Advancements in Mathematics” during February 01- 02, 2014.
6. Delivered an invited talk on “Mathematical models on a renewable and non-renewable resources” at Vevekanand Global University, Jaipur, in a National Conference on “Mathematical Techniques in Engineering Applications” during April 04-05, 2014.
7. Delivered the following two invited lectures in a Workshop on “Mathematical Epidemiology and Differential Equations” organized by IIT Patna during July 08-13, 2013:
(i) Optimal harvesting of a renewable resource
(ii) Optimal management of a renewable resource utilized by a population with taxation with taxation as a control variable
8. Participated in the “Study Group Meeting” held on 10^{th} July 2013 at IIT Patna.
9. Delivered the following two invited lectures in a Workshop on “Differential Equations in Ecology and Epidemiology" is organized by Department of Mathematics, IIT Roorkee during 10-14 October 2012.
(i) Dynamics of Prey-Predator Model with Self and Cross Diffusion
(ii) Modeling the dynamics of a human population living in a polluted environment with health and environmental policy