Sufian has more than a decade’s experience in legal practice. His areas of specialization are intellectual property law, franchising, international environmental law and laws relating to technology. Sufian was the legal advisor to a Malaysian Government science park where he advised on technology and the law, venture capital investment and patents in agriculture biotechnology. Sufian was also the legal advisor to the Malaysian Malay Chamber of Commerce and Labuan Liberty Port in East Malaysia. He also played a role in advising various interest groups in the formulation of the Malaysian Long Term Plan 2000–2010 (Malaysian OPP3).