Gabriel Comănescu Gabriel Comănescu is a former electrical officer in the Romanian Navy who owns one of the country’s most important oil drilling companies, Grup Servicii Petroliere. In 2009 the company landed a US$ 270 million contract with Russian natural gas giant Gazprom for an offshore gas pipeline in the Black Sea. Comănescu has a fortune estimated by Forbes at over €500 million (about $580 million).