Chiswell was one of the co-founders of Cambridge Antibody Technology (CAT), where he also served as CEO from 1996 till 2002. Chiswell currently serves as chairman of Albireo Pharma, Swedish developer of treatments for gastrointestinal disease, and is a director of Austria’s antibiotics specialist Nabriva Therapeutics. He is also a former chairman of the UK BioIndustry association (BIA). In 2006, he was awarded the Most Excellent Order of the British Empire (OBE) by Her Majesty the Queen for services to the biotechnology industry.