He also holds the position of Director in GAIL Gas Ltd., Green Gas Ltd., Ratnagiri Gas and Power Private Ltd., GAIL Gas (USA) Inc., and GAIL Global (USA) LNG LLC. Besides serving a long tenure at the GAIL, Shri Tiwari was posted as CFO, Brahmaputra Cracker and Polymer Limited (BCPL) during its formative years. During his tenure at BCPL, he was actively involved in Project Handling, Project Finance and Contract Finalization for construction of the Project. He is also actively involved in Investor Relations and interactions with Analysts fraternity. He is an active member of the Institute of Cost Accountants of India and The Institute of Directors.
An avid reader and poet by nature, he also served in National Thermal Power Corporation (NTPC), Satluj Jal Vidyut Nigam Limited (SJVNL) and Cawnpore Chemicals.