|Occupation||Investment banker, Author|
Matthew Simmons, chairman and CEO of Simmons & Company International, is a prominent oil-industry insider and one of the world's leading experts on the topic of peak oil. Simmons was motivated by the 1973 energy crisis to create an investment banking firm catering to oil companies. In his previous capacity, he served as energy adviser to U.S. President George W. Bush.
Matthew Simmons believes the Club of Rome predictions are more accurate than usually acknowledged . Simmons is an advisor to the Oil Depletion Analysis Centre. He is a member of the National Petroleum Council and the Council on Foreign Relations. He believes a careful assessment of Saudi Arabian oil reserves is the most significant issue shaping petroleum politics.
Simmons is the author of the book Twilight in the Desert: The Coming Saudi Oil Shock and the World Economy. His examination of oil reserve decline rates helped raise awareness of the unreliability of Middle East oil reserves as the published reports have never been verified.
In his book, Simmons argues that production from Saudi Arabia, and especially from Ghawar, the world's largest oil field, will peak in the near future, if it has not done so already. Simmons bases his case on hundreds of internal documents from Saudi Aramco, professional journals, and other authoritative sources.
"Twilight in the Desert" has been criticized for "turning benign technical matters into crisis-level evidence" and making "numerous technical gaffes", such as misinterpreting fuzzy logic as meaning "fuzzy numbers", "dew point" as meaning the pressure that a well stops producing, citing obsolete data on water cuts, and assuming that a pressure drop in a vertical wells has the same implications as in a multilateral well. He is also accused of ghost references and misrepresenting sources.
In August 2005, Simmons bet John Tierney and Rita Simon, the widow of Julian Simon, $2500 each that the price of oil averaged over the entire calendar year of 2010 will be at least $200 per barrel (in 2005 dollars). This wager has been dubbed "The Simmons-Tierney Bet." 
Simmons has made contributions to the films *PEAK OIL - Imposed by NatureThe Power of Community: How Cuba Survived Peak Oil (2006), The End of Suburbia, Crude Impact, and Crude Awakening: The Oil Crash, and appeared on *World Energy Television World Energy Video Interview, August 2008