Syed Azizul Haq, a patent holder of the "mechanical seal trap" and author of Harvesting Rainwater from Buildings, is president of the RAiN Forum – a non-profit voluntary platform for knowledge sharing and promotion of rainwater among scientist, engineers, architects, planners, academicians, practitioners, administrators, students and others who are directly or indirectly concerned about sustainable water management – and, following 35 years with the Public Works Department in Bangladesh, also serves as a part-time faculty member at a number of universities.