Leslie obtained both a B.Juris and LLB degrees from the University of Limpopo (Turfloop). He was admitted as an attorney of the High Court of South Africa during June 1996. He practised as an attorney for approximately five years after his admission until 2001 when he became one of the founding partners of the firm Mkhabela Huntley Adekeye Inc as it is known today.
Leslie is the senior partner of MHA. He has also served in a number boards and other capacities, including as Chairman of the Limpopo Gambling Board, the board of directors of Forever Resorts Aventura Proprietary Limited, specialist examiner of the Law Society of the Northern Provinces and member of the International Association of Gaming Regulators.
Leslie presently serves as joint trustee in the second bond issue of the City of Johannesburg Metropolitan Municipality, member of council of the National Film and Video Foundation (an agency of the Department of Arts and Culture) and board member and member of Policy Committee of China Africa Arbitration Centre (CAJAC).
Leslie is a panellist of the Law Society of Northern Provinces for the screening of candidate attorneys.