SAN ANTONIO, Texas, May 20, 2009 – Pioneer Drilling Company, Inc. (NYSE Amex : PDC) announced that it will participate in the UBS Global Oil & Gas Conference to be held at the Barton Creek Resort & Spa in Austin, Texas from May 18-21, 2009. Wm. Stacy Locke, President and CEO of Pioneer Drilling, will make a presentation at 9:25 a.m. Central Time on Wednesday, May 21. The presentation at the conference is not being webcast, but the presentation materials can be accessed beginning May 21 from the Pioneer Drilling Website at

Additionally, Pioneer Drilling will participate in the Deutsche Bank Energy, Utilities & Power Conference to be held in Miami, FL on May 27 & 28. Mr. Locke’s presentation is scheduled for 11:30 a.m. Eastern Time on May 28. The presentation will be broadcast live over the Internet and the webcast link can be accessed live and for replay by visiting the Company’s website todaywww.pioneerdrlg.com.

About Pioneer

Pioneer Drilling Company provides contract land drilling services to independent and major oil and gas operators in Texas, Louisiana, Oklahoma, Kansas, the Rocky Mountain region and internationally in Colombia through its Pioneer Drilling Services Division. The Company also provides workover rig, wireline and fishing and rental services to producers in the U.S. Gulf Coast, Mid-Continent and Rocky Mountain regions through its Pioneer Production Services Division. Its fleet consists of 71 land drilling rigs that drill at depths of 6,000 to 25,000 feet, 74 workover rigs (sixty-nine 550 horsepower rigs, four 600 horsepower rigs and one 400 horsepower rig), 61 wireline units, and fishing and rental tools.