He started his teaching career as a lecturer at the Department of Economics, Shahjalal University of Science and Technology, Sylhet in May 1996. Dr. Helal continued his teaching profession there as an Assistant Professor until July 2002. After his PhD, Dr. Helal joined in the Department of Economics of Dhaka University in 2008. He served the Department as an Assistant Professor from July 2008 to May 2014. Then Dr. Helal has been promoted to Associate Professor and till now he is serving the department.