Armada Oil Inc. (OTCBB: AOIL), an oil and gas exploration and production company, completed its acquisition of substantially all of the assets of Mesa Energy Holdings Inc.on March 28, 2013 and has announced a number of internal promotions and changes to its management team effective April 1, 2013.

James J. Cerna, Jr. will serve as president of the combined company following the acquisition. Cerna served as president and chief executive officer of Armada until the closing of the Mesa asset acquisition. From May 2006 to May 2009, he served as chairman of the board of Lucas Energy Inc. (NYSE: LEI), and was also CEO and president thereof from May 2006 until September 2008. From 2004 to 2006, he was president of the privately held Lucas Energy Resources.

Dallas-based Armada Oil has appointed David L. Freeman to the position of chief operating officer. Freeman has over 35 years of experience in oil and gas operations, business development, and property transactions. He served as Mesa’s executive vice president – Oil and Gas Operations since August 31, 2009, and served in the same position with Mesa Energy Inc. (MEI), Mesa’s primary operating subsidiary, since January 1, 2008. He began his career with Shell Oil Co. and was later hired by Gulf Oil/Chevron. Since that time, he has worked for a variety of E&P companies. From 2003 until July, 2005, he worked as an acquisition consultant to Celebrex Energy LLC.

In addition, Armada Oil has appointed J. Clint Unruh as executive vice president – Land and Administration. Unruh will be responsible for the oversight of all of the company’s land activities as well as a number of day to day administrative functions. In May of 2003, he joined Mesa Energy LLC, which became MEI in January 2006, where he served as vice president until May of 2007. During that time, he was responsible for various administrative functions as well as the negotiation and acquisition of pipeline right-of-way for that company. In May of 2007, he left MEI, to form Shiloh Homes LLC, a residential and commercial construction company that he owned and operated until December 2010. In January of 2011 he left Shiloh and joined Percheron Acquisitions LLC, where he served as a right-of-way agent and area manager overseeing the acquisition and construction of five midstream gathering systems for Pioneer Natural Resources Co. In February of 2012, he returned to Mesa to serve as vice president.

Finally, the company has appointed Jennifer O. Frey as vice president. Frey previously served as senior operations coordinator for Mesa Gulf Coast LLC, an MEI subsidiary, from September 2011 until the closing of the Armada transaction. Prior to joining MEI, she worked as a legal assistant for more than 10 years with Couhig Partners LLC in New Orleans, La. and also acted as a consultant for more than eight years with various oil and gas companies. As vice president of Armada, she will be primarily responsible for the management and oversight of regulatory affairs associated with the company’s drilling and producing oil and gas wells in Louisiana.

Complete bios and information on Armada’s other management team members may be found at www.armadaoil.us.

The company currently owns producing oil properties in Plaquemines and Lafourche Parishes in Louisiana, developmental properties in Garfield and Major counties, Okla. and Wyoming County, N.Y. and strategic acreage positions in and around the Laramie and Hanna Basins in southern Wyoming in the liquids-rich Niobrara play.