The Association is governed by its Board of Directors, comprised of employees of Drilling Contractor member companies who are elected annually. Responsibilities include confirming annual appointment of IADC’s Officers, reviewing significant organizational changes, and approving annual budget.

The Executive Committee consists of up to 21 Directors and leads the overall direction of the Association, including objectives, structure and operations, making recommendations to the Board of Directors as needed.

Advisory Panels are formed to evaluate issues affecting Members and report those issues to the Executive Committee for consideration and action.

IADC Officers & Executive Committee

2025 IADC OFFICERS

RODDIE MACKENZIE, CHAIR

Transocean

Named to his current position in February 2022, Mr. Mackenzie is responsible for identifying innovative technologies that create demonstrable value for Transocean’s customers and differentiate Transocean from its competitors in addition to leading Transocean’s Marketing organization. Mr. Mackenzie served previously as Senior Vice President, Marketing, Innovation and Industry Relations; Vice President, Marketing and Contracts; Managing Director, Business Development and Strategic Accounts, and as a Marketing Director with increasing roles of responsibility in the United States, France, and Dubai. He brings over 20 years of industry experience and prior to his time in Marketing, Mr. Mackenzie served in various operational and project roles around the globe, starting his career at Transocean as a rig-based engineer in 1997. He has worked on all manner of drilling rigs in Algeria, Nigeria, Cameroon, Angola, Brazil, and the US Gulf of Mexico.

Mr. Mackenzie graduated from the Harvard Business School Advanced Management Program in 2016 and received his bachelor’s degree from the University of Strathclyde in Civil Engineering with Environmental Studies in 1997.

CHRIS MENEFEE, VICE CHAIR

Executive VP & Chief Business Officer
Cactus Drilling Company

BRAD JAMES, IMMEDIATE PAST CHAIR

Enterprise Offshore Drilling

Mr. James has served as founding President, CEO and Board Member of Enterprise Offshore Drilling LLC since 2016. He previously served as Sr. Vice President – Marketing of Hercules Offshore from 2006 through 2016 and was responsible for managing worldwide marketing activity for Hercules drilling divisions. Prior to that he held various leadership roles at Transocean Offshore (including R&B Falcon and Cliffs Drilling), was founding President of Field Drilling Company and Vice President of Southland Drilling. He currently serves on the IADC Executive Committee and is a board member of IADC Drillers PAC and is a former Chairman of the IADC Houston Chapter. Mr. James obtained a Bachelor of Business Administration degree from Southwest Texas State University in 1981.

NICOLA STEPHEN, SECRETARY/TREASURER

Seadrill Ltd

Nicola Stephen is Director of Corporate Development at Seadrill Limited, where she leads the company’s M&A, Corporate Finance, and Treasury activities. With over 15 years of experience in M&A, commercial finance, and financial reporting, Nicola has led high-value transactions such as acquisitions, divestitures, and large-scale capital programs.

Prior to her current role, Nicola held senior positions in Commercial and Group Reporting at Seadrill. In these roles, she managed financial reporting, complex restructuring, and investment projects.

A Chartered Accountant (ICAS), Nicola began her career with Deloitte in the UK and Australia, managing audits and advisory projects for multinational clients. She holds a First-Class Honors degree in Accounting and Finance from Robert Gordon University and has completed executive education at INSEAD.

LEE WOMBLE, DIVISION VP DRILLING SERVICES

Kinetic Pressure Controls

Lee Womble has a long history throughout the drilling equipment industry. He is currently the owner of Cameron Drilling Specialists, LLC and serves as a Senior Advisor for Kinetic Pressure Control. Prior this position, he served as Vice President and Global Accounts Director for SLB with global responsibility for drilling contractor accounts over all SLB divisions and basins. He joined Cameron Iron Works in 1988 as a Product Design Engineer after receiving his Bachelor of Science degree in Mechanical Engineering from the University of Texas at Austin.

Lee received his registered Professional Engineer license from the State of Texas in 1993 and obtained his first patent in 1994. He has since managed engineering, repair operations, manufacturing, field service and sales. Mr. Womble has since held numerous positions throughout his 37-year career such as Design Engineer, Repair and Sales Mgr., Regional Manager, Director and Vice President. He has lived in locations such as the US, Saudi Arabia, Egypt, Indonesia, and Malaysia.

Lee’s passion is to improve both commercial and operational efficiencies amongst the drilling contractor community. Lee has served on committees for API, AADE, IADC and The Joint Industry Task Force. He is currently focused on leading the IADC Drilling Services Advisory Panel and acting as Chairman for the 2026 IADC/SPE Drilling Conference.

GENE STAHL, DIVISION VP NORTH AMERICA ONSHORE

Precision Drilling Corporation

Gene C. Stahl was appointed as Chief Operating Officer of Precision in October 2025. Over his nearly three decades with the company, he has held leadership roles spanning operations, engineering, manufacturing, marketing, and health and safety, giving him a uniquely comprehensive view of the business.

Before becoming Chief Operating Officer, Mr. Stahl was President, North American Drilling (2023–2025), overseeing Canadian and U.S. operations, and Chief Marketing Officer (2019–2023), where he strengthened customer relationships and advanced Precision’s competitive position.

Mr. Stahl holds a Bachelor of Arts in Economics from the University of Calgary and completed the Advanced Management Program at Harvard Business School. He also serves on the International Association of Drilling Contractors (IADC) North American Onshore Advisory Panel and is a member of the Young Presidents’ Organization (YPO).

JON RICHARDS, DIVISION VP OFFSHORE

Noble Corporation

Jon Richards currently serves as Vice President Operations for Noble Corporation. He previously served as Senior Vice President of Worldwide Operations for Diamond Offshore. Mr. Richards joined Diamond Offshore in 1997 and has over 27 years of experience in the offshore drilling industry.

Jon started his career as an Operations Development Trainee with Diamond and has since held various leadership roles and responsibilities managing operations in the United States, United Kingdom, West Africa, and Brazil. Jon holds a degree in Business Management from Texas Tech University and participates in various roles as a member of the IADC. In his free time, Jon enjoys spending time outdoors with his family and volunteering with youth sports.

JIM NOWOTNY, DIVISION VP INTERNATIONAL ONSHORE

Helmerich & Payne

Jim Nowotny is the Vice President International and Offshore Business Development at Helmerich & Payne.  He has extensive domestic and international leadership experience in multiple areas of the offshore and land drilling industry, including marketing and business development, commercial and technical contracts, operations, manufacturing, and engineering.  He has worked in the energy industry since 1995.

Prior to joining Helmerich & Payne, he worked for an international oil field equipment manufacturer.  There he was responsible for four manufacturing business units within Canada and the USA.  He oversaw all aspects of business operations, including the manufacturing, engineering, and business development groups. Jim also worked for over 16 years in various roles for Atwood Oceanics, an international offshore drilling contractor.  He worked in increasing roles of responsibility in the areas of engineering, operations, marketing, and business development.

Jim has a Bachelor of Science degree in mechanical engineering from Texas A&M University and has completed several executive education courses at Columbia Business School, Harvard Law School and Kellogg School of Management at Northwestern University.

2025 Executive Committee

• ANTON DIBOWITZ, Valaris plc, Houston, Texas
• BRAD JAMES, Enterprise Offshore Drilling, Houston, Texas
• BRUNO MORAND, Borr Drilling, Dubai, UAE
• CHRIS MENEFEE, Unit Drilling Company, Oklahoma City, Oklahoma
• DAN HOFFARTH, Citadel Drilling Ltd., Odessa, Texas
• GENE STAHL, Precision Drilling Company, Houston, Texas
• IHAB TOMA, Vantage Drilling International, Dubai, UAE
• JAMES “JIM” NOWOTNY, Helmerich & Payne IDC, Tulsa, Oklahoma
• JOHN “JAY” W. NORTON, Norton Energy Drilling, Lubbock, Texas
• JON RICHARDS, Noble Corporation, Houston, Texas
• LEE WOMBLE, Kinetic Pressure Controls, Houston, Texas
• MIKE GARVIN, Patterson-UTI Drilling Company LLC., Houston, Texas
• NICOLA STEPHEN,  Seadrill Ltd, Houston, Texas
• ROBERT “BOB” GEDDES, Ensign Energy Services, Calgary, Canada
• ROBERT EIFLER, Noble Corporation plc, Sugar Land, Texas
• RODDIE MACKENZIE, Transocean Ltd., Houston, Texas
• SHANE MARCHAND, H&P, Houston, Texas
• SIMON JOHNSON, Seadrill Ltd., Houston, Texas
• SULTAN AL MANSOORI, ADNOC, Abu Dhabi, UAE