Rinaldi Firmansyah started his career at Schlumberger Wireline at the North Sea, the UK as a Wireline Engineer from 1985 – 1986. Rinaldi also often serves as Commissioner in several companies, for example, PT. Semen Padang as Commissioner and Chairman of the Audit Committee from 2003 – 2004, CEO of PT Telekomunikasi Indonesia, Tbk. (Telkom) in 2007 – 2012, PT PLN Batam, PT Elnusa Tbk., PT Indosat Tbk, PT Pinnacle Investama, PT Bluebird Tbk, and PT Indonesia Infrastructure Finance.
Dr. Rinaldi Firmansyah teaches in MBA program classes at IPMI International Business School.