Aside from McLaren Group, he is also one of six British business persons to be an official British Business Ambassador for advanced engineering and manufacturing. Dennis is also a main trustee for Tommy's, a miscarriage help charity. He is the Global Consultant for the state owned China Minsheng Investment Group and also the chairman for the UK Summit. With interests in foreign trade, Dennis also became Chairman of the British East Asian Council in 2014. Before the merger with LVMH, Dennis was a major shareholder in the luxury watch maker TAG Heuer, along with his business partner, Mansour Ojjeh.