Datu Haji Soedirman Bin Haji Aini is a Fellow member of the Association of Chartered Certified Accountants, United Kingdom (FCCA) and a member of the Malaysian Institute of Accountants. He has attended the Macro Economic Policy and Management Program at Harvard University.

He started his career with Petronas in 1982, where he served in the Economic and Investment Evaluation Department, Corporate Planning Division, and its subsidiary company, ASEAN Bintulu Fertilizer Sdn. Bhd. After serving 13 years with Petronas, he resigned in 1995 to join the Sarawak State Government.

Prior to his retirement from the State Government in December 2018, he held the position of the General Manager of Sarawak Economic Development Corporation (SEDC). His previous employment in the Sarawak Civil Service includes being the Permanent Secretary of the Ministry of Social Development, Director of State Implementation Monitoring Unit, Permanent Secretary of the Ministry of Industrial Development, Deputy State Financial Secretary, and State Accountant-General. Between November 2002 and September 2003, he was seconded to Amanah Saham Sarawak Berhad as its Chief Executive Officer. During his tenure with the Sarawak Government, he served on the Boards of Malaysia L.N.G. Tiga Sdn. Bhd. and Malaysia Investment Development Authority (MIDA).