According to Robert Baer, she believed the CIA was protecting American oilman Roger Tamraz, in a complex deal in which the White House favored a consortium of oil companies over Tamraz's project for oil production in Central Asia. Heslin, according to a report from the Senate Committee on Homeland Security and Government Affairs, "resisted inappropriate and possibly unlawful attempts by senior officials to change U.S. Government policy in pursuit of Tamraz’s money." The Committee report said that Lebanon and France, in June 1995, had Interpol warrants on Tamraz.
She has been reported as involved with multinational efforts to build oil pipelines in Central Asia. She was linked to the Foreign Oil Companies Group by Robert Baer and by Washington Post reporting. 
- The Saga of Roger Tamraz, U.S. Senate Committee on Homeland Security and Government Affairs, p. 1
- Dan Morgan and David B. Ottaway (4 October 1998), "Azerbaijan's Riches Alter the Chessboard: Part 3, a British Coup", Washington Post Staff Writers
- Robert Baer (2002), See no evil: the true story of a ground soldier in the CIA's war on terrorism, Thorndike Press, pp. 219-222
- Debra J. Saunders (19 September 1997), "Sheila Heslin: The Last Girl Scout", San Francisco Chronicle