Born in Eastern Uganda, Denis is from the Kumam tribe. He grew up in a rural village where his father is a local chief. After completing secondary school, Denis moved to the capital of Kampala where he became an escort driver for an NGO delivering relief supplies to Southern Sudan. After four years in that capacity, he decided to pursue a career change and entered the tourism industry, following a strong childhood interest in wildlife. Through a combination of on-the-job and formal training courses with the Queen Elizabeth Bird Observatory and BirdLife International, Denis has gained extensive knowledge as a general-interest tour guide with a specialty in birding. He has worked as a driver/guide for the past 20 years and is a member of the Uganda Driver/Guide Association and the Uganda Bird Watching Society. In his spare time, Denis loves to read and watch wildlife documentaries. He lives in Kampala with his wife and four children.