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

Address: 210/1, Tejkunipara, Tejgaon, Dhaka-1215, Bangladesh

Phone- 01742125232, 01856688998

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

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