Chandrasekaran Mohan is an Indian-born American computer scientist. He was born on 3 August 1955 in Tamil Nadu, India. After growing up there and finishing his undergraduate studies in Chennai, he moved to the United States in 1977 for graduate studies, naturalizing in 2007. In June 2020, he retired from being an IBM Fellow at the IBM Almaden Research Center (San Jose, California) after working at IBM Research for 38.5 years. Currently, he is a visiting professor at China's Tsinghua University. He is also an Honorary Advisor at the Tamil Nadu e-Governance Agency (TNeGA) in Chennai and an advisor at the Kerala Blockchain Academy in Kerala. Education Mohan received his PhD in computer science from the University of Texas at Austin in 1981. He received a B.Tech. in chemical engineering from IIT Madras in 1977. He had his pre-college education in Vellore, Tamil Nadu. Career After finishing his PhD in the database area in December 1981, Mohan joined IBM Research in San Jose, working on projects like R*, Starburst, Exotica, and DBCache. He subsequently worked as a visiting scientist at INRIA Rocquencourt in 1998–1999, then returned to IBM. From June 2006 until January 2009, he worked as the IBM India Chief Scientist, based in Bangalore. After his return to IBM Almaden Research Center at the end of his India assignment, Mohan worked on projects relating to Storage Class Memories, Big Data, Hybrid Transactional/Analytical Processing (HTAP) enhancements to IBM Db2 and Apache Spark, and Blockchain and Distributed ledger technologies. He gave numerous keynotes and other talks on NoSQL, NewSQL, modern enhancements to classic RDBMSs and Big Data. Since 2017, he has lectured on blockchain and distributed ledger technologies, co-organizing seminars and giving a keynote on the topic. In August 2016, Mohan was named a visiting professor in the School of Software of China's Tsinghua University. Mohan has published numerous conference and journal papers in the areas of database, workflow and transaction management, and blockchain technologies. According to Google Scholar, his h-index is 68 and his i10-index is 141. He is the primary inventor of the ARIES family of recovery and concurrency control methods, and the industry-standard (e.g., X/Open XA) Presumed Abort commit protocol. His journal papers on ARIES and Presumed Abort are considered classic papers in the areas of transactions, recovery, distributed commit and locking, and are included in a collection of database papers, informally called the "Red Book", edited by