Mark is responsible for the management and growth of the raiSE Singapore (Singapore Centre for Social Enterprise) investment portfolio. He is also an advocate for impact investments via his role as Host Member-Asia of Toniic, the global action community for impact investors.

Mark is also responsible for the management of his family office investment portfolio, which provides expansion capital to established companies, as well as venture capital to companies in early stages of development. Drayhall also invests invests in social organisations, businesses that are driven to make a positive social and/or environmental impact in addition to economic returns.