Weerasingha's alma mater is S Thomas' College, Mt. Lavinia. He holds a Master of Business Administration degree from University at Los Angeles, California. He has more than 15 years of experience in leadership roles and has previously worked with companies such as Brown & Company PLC, Singer Sri Lanka, Nivasie Developers (Pvt) Ltd, and Lanka Walltiles.
BASF has had an association with Sri Lanka for almost 75 years. With 45 employees, and a state-of-the-art warehousing complex at Sapugaskande, BASF registered sales of approximately EUR 20 million to customers in Sri Lanka in 2013.