sentences:  Headquartered in Baar, Switzerland, Weatherford operates in more than 100 countries across the globe and employs more than 35,000 people (2016).On 6 June, Weatherford International announced that Mark A. McCollum, President, CEO and a director, has left the company, effectively immediately.Karl Blanchard, executive vice president and COO, and Christian Garcia, executive vice president and CFO, will form the Office of the Chief Executive, reporting directly to the board of directors and will oversee the day to day operations.