Mrs. Nasreen Mahmud Kasuri founded the Beaconhouse School System (BSS) in 1975. BSS is the largest and oldest private school system in Pakistan and is located in 27 cities. It has a student body of over 70,000 and a staff exceeding 7,000 (of which 4,500 are teachers).

Mrs Kasuri is widely traveled and has attended many seminars and courses on education and management. She has served as a member of The Social Empowerment Group - Punjab Sub Committee on Education and is a member of the Education Advisory Board, Ministry of Education, Government of Pakistan and the Punjab Educational Foundation. She is also member of WWF, Pakistan.