Pioneer Energy Services announced that Franklin (Red) C. West, Executive Vice President and President of Drilling Services Segment, will retire effective January 1, 2015. The company also announced that Brian L. Tucker will succeed Mr. West as Executive Vice President and President of the Drilling Services Segment, effective January 1, 2015. Since joining Pioneer in 2012, Mr. Tucker has served as Senior Vice President over the Appalachia, Utah and North Dakota drilling divisions.