Sonterra Resources Inc., San Antonio, (OTC BB: SOTR) has named Donald Vandenberg chief executive and president. Gary Lancaster has been named vice president and chief legal officer. Vandenberg will replace Michael Pawelek who has resigned. Vandenberg was with Velocity Energy Ltd. LLC, Velocity Energy Offshore LP and Velocity Energy Partners LP, J.M. Corp., Equitable Resources Co., Maxus Energy Corp., Kilroy Co., Union Texas Petroleum Inc. and Aminoil Inc. Lancaster was with Velocity Energy Ltd., J.M. Corp., Ico Inc., Scurlock Permian Corp., Duane Morris LLP and Baker & McKenzie LLP.