Humphrey began his entrepreneurial career in the early 1980s after working with the Central Bank of Kenya.
His initial ventures included Nairobi’s famous Green Corner restaurant, which is quoted on President Obama's list of most visited sites in Nairobi, and the Twigs Restaurant and Cactus Bar.
He went on to establish and grow other businesses over the last three and a half decades, including many of those that constitute JCG today. A believer in the potential of the African continent, he is credited with creating some of the most successful businesses in Africa within the Power, Hospitality, Real Estate and Horticulture sectors.
Humphrey strives to ensure that the commercial success of his companies has a positive impact on the communities in which they operate. The companies undertake various projects to support education, health, development and environmental conservation causes in their localities.
Outside of his businesses, he is passionate about innovative sustainable agriculture and, through his companies, he supports agribusiness projects and provides market linkages to rural farmers in Kenya.
Humphrey is a strong believer of localized energy solutions including off-grid power solutions. An advocate of wildlife conservation, he supports the Mount Kenya Wildlife Conservancy whose flagship project is the rehabilitation of the endangered Mountain Bongo antelope.