He worked in a number of industries in South Africa, Namibia and Australia, including oil and gas, property development ,construction, healthcare and financial services. His career has seen him hold several senior management and executive roles in large companies locally and internationally. His career included the position of CEO of Metropolitan Health Group in South Africa. Blum spent twelve years in Australia where he acquired significant business experience and returned to South Africa in 1993.On his return to South Africa he became actively involved in several community projects and is actively involved in the transformation agenda of the country. Blum serves as a non-executive director on the boards of various South African companies.