GASFRAC Energy Services Inc. appointed an interim chief executive late last week, on the same day former chief executive James Hill left the company's top job. GASFRAC announced that Mark Williamson would serve as the company's interim chief executive and chairman while a search begins for a permanent replacement, expected by year-end. Also the company's board of directors announced that it will oversee a review of the business that is expected to create shareholder value, among other objectives.

The company also appointed Larry Lindholm as lead independent director of GASFRACs board of directors and a member of its audit committee.