National Oilwell Varco Inc. announced that Isaac H. Joseph has been promoted to President, Wellbore Technologies. Mr. Joseph began his career in the oilfield services industry with Tennessee Gas Pipeline in 1980. From 1982 to 1995, he had various sales, operations and sales management roles for Plastic Applicators and Tuboscope Vetco International. In 1995, Mr. Joseph joined ICO Worldwide as the Regional Operations Manager for the Gulf Coast.