Rowan leads Climate and Resilience Hub (CRH) at WTW and Chairs the Willis Research Network. With a team of around 100 experts, the CRH aligns and mobilises the Company's mainstream risk, capital and people businesses towards clients' growing climate-related requirements. Previously he served on the Board of Willis Re as CEO Global Analytics and founded the Willis Research Network of universities. In 2014 he established the Capital Science and Policy Practice to apply Willis Towers Watson's reinsurance expertise on resilience analytics, capital management and regulation and into wider sectors and support the Company’s growing leadership on climate and finance which grew into the CRH.

Beyond Willis Towers Watson, he founded the Insurance Development Forum in 2015 with industry, United Nations and World Bank leaders and supports the Coalition for Climate Resilient Investment. He has served UK Prime Minister’s Council for Science and Technology and the UK Green Finance Task Force.