After qualifying as a Chartered Accountant in 1972, Malcolm practiced as a partner of Grant Thornton LLP (Chartered Accountant and Business Advisers) and was elected Managing Partner of the Johannesburg office in 1986 and National Executive Chairman in 1989. Malcolm resigned from Grant Thornton LLP in 1997 to establish a private equity investment fund which he managed until acquired by Sasfin Holdings Limited in 2005.
In February 2012, Malcolm resigned from the boards of both Sasfin Holdings Limited and Sasfin Bank Limited to enable him to pursue his passion – entrepreneurship and entrepreneurial investment activities. He currently sits on the boards of various companies in which he holds private equity investments and inter alia is also an External Member of the Special Credit Committee of the Industrial Development Corporation of South Africa Limited and a member of the Listings Advisory Committee of AltX (Alternate Exchange of the Johannesburg Stock Exchange). Malcolm is also the Chairman of KMC Chain Industrial Co., Ltd.