For iso certification related information you can contact with the management of Advanced Assessment  Services (AAS)  from the below mentioned ways:

Address: House # 391(1st Floor), Road # 29, New DOHS, Mohakhali, Dhaka-1206, Bangladesh

Phone- 01742125232, 01856688998

Email: info@aas-bd.com, basbdoffice@gmail.com

Website: http://www.aas-bd.com