Randy L. Limbacher, former chairman, CEO and president of Rosetta Resources Inc., is taking the helm of Tulsa onshore operator Samson Resources Corp. Limbacher, who has 32 years in the exploration business, ran Rosetta from November 2007 until the end of February. He previously was president of exploration and production in the Americas for ConocoPhillips and worked at predecessor Burlington Resources Inc. for 20 years. “With positions in some of the best plays in North America, a dedicated team of talented executives, and the backing of leading energy investors, Samson is well positioned to begin its next phase of growth,” said Limbacher.

Rocky Mountain producer Bill Barrett Corp. has appointed R. Scot Woodall as CEO and president. Woodall, who served as interim CEO since January, “has significant industry experience and his commitment to operational excellence [that] should deliver shareholder value as we develop our core positions in the Denver Julesburg Basin and Uinta oil program,” said Chairman Jim Mogg. Woodall, 51, had been COO of Barrett since July 2010 and previously was executive vice president and senior vice president (SVP) of operations beginning in April 2007. He previously worked at Forest Oil Corp. for seven years, last serving as SVP of the western region.