Conference Treasurer of the 5th International Conference on Industrial and Mechanical Engineering and Operations Management (IMEOM 2022) organized by IEOM Society Bangladesh Chapter (IEOM-BD), Dhaka, Bangladesh held on 26 - 27 December, 2022.

Congress Chair of the International Congress on Control Systems 2022 (ICCS 2022), organized by the Association of Scientists, Developers and Faculties (ASDF-International), to be hosted in Hong Kong on August 11-12, 2022.

Organizing Secretary of the International Conference on STEM and Fourth Industrial Revolution (ICSTEM4IR 2022), organized by Science Engineering and Technology School, Khulna University, Khulna Bangladesh to be held on July 1-3, 2022.

Conference Co-Chair and Organizing Chair of the NSRIC First Virtual International Conference on Nature Science, Education and Engineering (ICNSEE 2022), organized by World Association of Nature Science, Education and Engineering (WANSEE) and sponsored by NSRIC Inc. to be hosted in Toronto, Canada on February 10-11, 2022.

Member of National Organizing Committee of the 12th National Undergraduate Mathematics Olympiad 2021 jointly organized by Department of Applied Mathematics of Dhaka University (DU), Bangladesh Mathematical Society and A F Mujibur Rahman Foundation held on 7 January, 2022.

Conference Treasurer of the 4th International Conference on Industrial and Mechanical Engineering and Operations Management (IMEOM 2021) organized by IEOM Society Bangladesh Chapter (IEOM-BD), Dhaka, Bangladesh held on 26 - 27 December, 2021.

Member of Organizing Committee and Chair of the Technical Program Committee of the 22nd International Mathematics Conference (IMC 2021) organized by Bangladesh Mathematical Society (BMS), Dhaka, Bangladesh held on 10 - 11 December, 2021.

Congress Chair of the International Congress on Control Systems 2021 (ICCS 2021), organized by the Association of Scientists, Developers and Faculties (ASDF-International), hosted in Hong Kong on August 13-14, 2021.

Organizing Chair of the Two Days Training Workshop on Computational Tools for Solving Dynamic Models in Mathematical Biology (Virtual) organized by Bangladesh Society for Mathematical Biology (BSMB), Dhaka, Bangladesh on 8 - 9 August, 2021.

Conference Chair of the Two Days International Conference on Computational and Mathematical Biology (ICCMB 2021) organized virtually by Bangladesh Society for Mathematical Biology (BSMB), Dhaka, Bangladesh on 30 - 31 July, 2021.

Conference Treasurer and Session Chair of the 3rd International Conference on Industrial and Mechanical Engineering and Operations Management (IMEOM 2020) organized by IEOM Society Bangladesh Chapter (IEOM-BD), Dhaka, Bangladesh on 26 - 27 December, 2020.

Conference Chair of the Two Days International E-Conference on Recent Advances in Biomathematics (IECRAB 2020) organized by Bangladesh Society for Mathematical Biology (BSMB), Dhaka, Bangladesh on 18 - 19 December, 2020.

Organizing Member and Session Chair of the International Workshop on Recent Trends in Mathematical Biology (RTMB) 2020 jointly organized by Bangladesh Society for Mathematical Biology (BSMB) and Department of Mathematics, Jahangirnagar University, Savar, Dhaka, Bangladesh on 14-15 January, 2020.

Session Chair of The 8th International Conference on Global Optimization and Its Application (8th ICoGOIA), organized by Universiti Tun Hussein Onn Malaysia In collaboration with Indonesian Operations Research Association (IORA) held at Premeira Hotel, 23-24 November 2019, Kuala Lumpur, Malaysia.

Session Chair of the International Conference on Recent Advances in Mathematics and its Applications (ICRAMA2019) on July 16-18, 2019, Department of Mathematics, Tripura University, Agartala, India.

Session Chair to one session of the National Seminar on Recent Trends in Mathematical Sciences (RTMS-2019) held at Department of Mathematics, University of Burdwan, WB, India on 6-7 February, 2019.

Session Chair of the 'Session III' of the A F Mujibur Rahman-Bangladesh Mathematical Society National Mathematics Conference 2018 organized by Bangladesh Mathematical Society, University of Dhaka, Bangladesh on 21-22 December, 2018.

Session Chair of the Session 3C: Ecosystem Dynamics, Reservation and Protection (Ecosystem-Climate Interactions) of the 17th CAS-TWAS-WMO Forum International Symposium on Eco-hydrology and Climate Change, organized by the CAS-TWAS Centre of Excellence for Climate and Environment Sciences, held at Yuanchenxin International Hotel, Beijing, China on 17-19 September, 2018.

Session Chair of the 1st International Conference on Industrial and Mechanical Engineering and Operations Management (IMEOM 2017), jointly organized by IEOM Society of Bangladesh and IEOM Society International at the Institute of Engineers Bangladesh (IEB) Dhaka, Bangladesh on 23-24 December, 2017.

Panel Speaker of panel discussion titled “Industry–Academia cooperation for knowledge creation, curriculum development and sustainable economic progress” at the 1st International Conference on Industrial and Mechanical Engineering and Operations Management (IMEOM 2017), jointly organized by IEOM Society of Bangladesh and IEOM Society International at the Institute of Engineers Bangladesh (IEB) Dhaka, Bangladesh on 23-24 December, 2017

Session Chair of the 'Track-2: Modeling' of the International Conference on Modeling, Computing and Technological Innovations (ICMCTI-2017) organized by University Institute of Technology (UIT), Burdwan University, West Bengal, India on 23-25 March, 2017.

Session Chair of the Day-long Workshop on Mathematics in Real Problems jointly organized by Bangladesh Mathematical Society and Dept. of Mathematics, Pabna University of Science and Technology (PUST), Pabna, Bangladesh held on 6 December, 2016.

Convener of the Workshop/Seminar Organizing Committee formed by Bangladesh Mathematical Society, Dhaka, Bangladesh during the period 2016-2017.

Convener of the Local Organizing Committee of the 8th National Undergraduate Mathematics Olympiad (Khulna Zone) jointly organized by Bangladesh Mathematical Society and A F Mujibor Rahman Foundation at Mathematics Discipline of Khulna University, Bangladesh held on 9 December, 2016.

Member of the Central Organizing Committee of the 8th National Undergraduate Mathematics Olympiad 2016 jointly organized by Bangladesh Mathematical Society and A F Mujibor Rahman Foundation held at Department of Mathematics, Bangladesh University of Engineering and Technology, Bangladesh on 23 December, 2016.

Session Chair of the 19th International Mathematics Conference 2015 in the session AMM: "Applied Mathematics and Modeling" jointly organized by Bangladesh Mathematical Society and Department of Mathematics and Natural Sciences, BRAC University, Bangladesh held on December 18-20, 2015.

Organizing Chair of the 1st International Conference on Mathematics and Its Applications (ICMA-2015) at Mathematics Discipline of Khulna University, Bangladesh held on December 23, 2015.

Member of the Central Organizing Committee of the 7th National Undergraduate Mathematics Olympiad (Final Round) jointly organized by Bangladesh Mathematical Society and A F Mujibor Rahman Foundation held at Department of Applied Mathematics, University of Dhaka, Bangladesh on 11 December, 2015.

Convener of the Local Organizing Committee of the 7th National Undergraduate Mathematics Olympiad (Khulna Zone) jointly organized by Bangladesh Mathematical Society and A F Mujibor Rahman Foundation at Mathematics Discipline of Khulna University, Bangladesh held on 4 December, 2015.

Member of the Technical Committee of the First National Conference on Mathematics and Its Applications (NCMA-2015) organized by Department of Mathematics, Chittagong University of Engineering and Technology, Chittagong, Bangladesh on 14 November, 2015.

Member of the Organizing Committee of the 6th National Undergraduate Mathematics Olympiad (Khulna Zone) jointly organized by Bangladesh Mathematical Society and A F Mujibor Rahman Foundation at Mathematics Discipline of Khulna University, Bangladesh held on 18 November, 2014.

Member Secretary of the Organizing Committee of the 6th Mathematics Conference and 5th Annual General Meeting organized by Mathematics Forum Khulna at Mathematics Discipline, Khulna University, Khulna, Bangladesh on 18 April, 2014.

Member of Technical Committee and Advisory Board, 2013 International Joint e—Conference journals on Advances in Science, Technology and Development. https://sites.google.com/site/1stecj2013/home

Member of the Organizing Committee of a day-long national seminar on Mathematics and Its Applications organized by Mathematics Discipline, Khulna University, Khulna, Bangladesh on 21 April, 2008.

Organizing Chair of the national seminar on Prevention of AIDS: Role and Responsibility of Teachers in the Community jointly organized by Red Crescent Youth, Khulna University Unit and World Vision Bangladesh, Khulna on April 9, 2006.