Douglas was most recently CEO of Tarsus Group, having joined the business when it was launched in 1998. He previously held senior positions at Blenheim Group plc and after its takeover, United Business Media plc. He is a past Chairman and Director of the Association of Event Organisers (AEO), as well as past Chairman of the Events Industry Alliance. He is a board member of US industry advocacy body, the Exhibition & Conference Alliance (ECA) and was also the first international board member of the US industry trade body, SISO, where he went on to serve as Chair. Douglas oversaw the acquisition of Tarsus Group by Informa plc where he now acts as Senior Advisor on the combination of the two businesses.