Sayed has witnessed various children’s rights violations occurring in Bangladesh. This prompted him to take a stand and help children in any way he knew possible.  Sayed is the founded of an organisation called Child Rights and Welfare Association in 2019. His organisation mainly aims to assist children living on the street, or child labourers.  Through his organisation Sayed has helped many children by providing them with free food, shelter, education and medical care to those disadvantaged children.  In 2020, Sayed opened a branch of the Child Rights and Welfare Association to prevent child abuse. He created a website and apps for children where anyone can report child abuse. If any allegation of child abuse is found, it is sent to the administration. If there are problems with basic needs (living, food, clothing, shelter, education, medical care), Sayed and his organization try to solve them.  A Child Abuse Prevention Committee was formed by Sayed Mahmud which prevented more than 978 child abuse and 1091 child marriages. In recognition of his work with children, he was invite to be the first Bangladeshi child to speak at the 76th session of the UN General Assembly. Sayed has also established 131 children’s schools in Bangladesh.