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>https://www.mountsinai.org/about/leadership/james-tisch
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Chairman, Diamond Offshore Drilling
Diamond Offshore Drilling, Inc. is an offshore drilling contractor. The company is headquartered in Houston, Texas, United States, and has major offices in Australia, Brazil, Mexico, Scotland, Singapore, and Norway.
The company operates 15 drilling rigs including 11 semi-submersible platforms and 4 drillships.
In 1989, Loews Corporation acquired the company for $48.5 million.
In October 1995, the company once again became a public company via an initial public offering, listing on the New York Stock Exchange.
In April 1996, the company acquired Arethusa for $516 million in stock. Arethusa had previously acquired Zapata Corporation (now HRG Group).
https://en.wikipedia.org/wiki/Diamond_Offshore_Drilling