Executive Biographies

Thomas L. Wingerter Thomas L. Wingerter
President / CEO
Dewayne G. Vogt Dewayne G. Vogt
Senior Vice President / Chief Engineer
Melissa D. Herring Melissa D. Herring
Senior Vice President – Operations
Joel T. Devonshire Joel T. Devonshire
Vice-President – Inside Sales
Harold H. Kalich Harold H. Kalich
Director, Finance and Accounting
Jason P. Gress Jason P. Gress
Director, International Derrick Projects & Quotations
Steven L. Ellis Steven L. Ellis
Director, Quality and Field Services
Valery B. Christmas Valery B. Christmas
Director, Human Resources