Diamond Offshore Drilling, Inc. is a Houston-based offshore drilling services provider operating a fleet of 15 rigs, including 11 semisubmersibles and four ultra-deepwater drillships. The company serves major and independent oil and gas firms across the Gulf of Mexico, South America, Australia, Southeast Asia, Europe, and Africa. With approximately 2,300 employees, the firm maintains regional offices in Brazil, the United Kingdom, and Australia, providing contract drilling services supported by proprietary technologies like PCbtH and Sim-Stack.