One of the founders of Cenpower, Dr. Heymann is a medical practitioner. After acquiring a lot of working experience in Ghana and Nigeria, he established a successful medical practice in Ghana in 1989. He has served on the board of Arab Contractors (Ghana). For a year (2005 -2006), he was an adviser to the then Minister of Science, Technology, and Environment. He also served as Ghana's High Commissioner to the Republic of South Africa (2006-2009).