PATTERSON-UTI ENERGY, INC announced that Julie J. Robertson and Cesar Jaime have been appointed to the Company's Board of Directors. With these appointments, the Patterson-UTI Board has been expanded to eight members. Ms. Robertson has more than 40 years of operational, executive, administrative and human resource experience at one of the world's largest offshore drilling companies, including having served as its Executive Chair, Chair of the Board, President and Chief Executive Officer.

Mr. Jaime has 30 years of experience in international oil field services in Latin America, Europe and Africa for the largest international oil field services company, including having served as President of the Latin America division, as well as serving on boards of private companies.