 Outside the university, he founded the cultural organisations Arony Sangskritik Sangsad and Kamal Gandhar, and set up a music school at Bagmara.He was the founding editor of the literary magazine "Kamal Gandhar".Siddique was married to Hosne Ara Sheera and had a son Riyasat Imtiaz Sourav and daughter Rizwana Hasin Shotovi, all of whom survived him.