Randy McMullen has been appointed CEO of C&J Energy Services Ltd. following the death of founder Joshua Comstock (see Shale Daily, March 11). McMullen also will continue as CFO. The board plans to separate the roles of chairman and CEO, which Comstock had held, and announce a chairman "in due course." McMullen joined the oilfield services company in August 2005 as CFO and became president in October 2012. Prior to joining C&J, McMullen held various positions with Arthur Andersen, Credit Suisse First Boston and Growth Capital Partners. He graduated magna cum laude from Texas A&M University with a degree in finance.