Management Team

Management Team

Alexander (Sandy) Esslemont

President & Chief Executive Officer


Sandy Esslemont is the president and chief executive officer of Parker Drilling. He was elected president and chief executive officer on April 30, 2020, and appointed as a member of the Board of Directors.

Mr. Esslemont has more than 37 years of international oil & gas industry experience in drilling operations, petroleum technology, and executive management. He has held leadership roles at privately held, publicly-traded, and venture-backed companies in roles based in the U.S., Africa, Asia, Europe, Australasia, and the Middle East, the majority of which are in the oilfield services and related industries.

Prior to joining Parker, Mr. Esslemont served as CEO for Abrado, a Houston-based company in which he was an original founder.  Previously, he was CEO and Chairman of SensorTran Inc., which was sold to Halliburton under his leadership; President, Western Hemisphere of EXPRO International Group, an international oilfield services company; and served as CEO of ROXAR group, an international oilfield technology company.

Mr. Esslemont holds a BSc in Mechanical Engineering from Heriot-Watt University, Edinburgh, and is an active member of the Society of Petroleum Engineers.

Michael W. Sumruld

Senior Vice President, Chief Financial Officer

Mike Sumruld is senior vice president and chief financial officer (CFO) for Parker Drilling, appointed October 1, 2017. He manages the company’s investor relations, corporate development, treasury, accounting and finance, tax, financial planning and analysis, supply chain and information technology organizations.

He most recently served as chief accounting officer for LyondellBasell Industries N.V., one of the largest plastics, chemicals, and refining companies in the world. In that role, he had global responsibility for corporate accounting, financial reporting, and internal controls. From 1998 through 2016, Mr. Sumruld worked at Baker Hughes Incorporated, a leading supplier of oilfield services, products, technology and systems to the worldwide oil and natural gas industry, where he held a range of financial roles, covering the U.S., Latin America, and the Eastern Hemisphere as well as global financial roles covering several product lines. Mr. Sumruld’s most recent roles at Baker Hughes include vice president and treasurer from 2013-2016; vice president finance eastern hemisphere from 2012 – 2013; and director, investor relations 2011.

Mr. Sumruld is a certified public accountant and holds a bachelor’s degree in accounting from the University of Houston and an MBA from Texas A&M University.

Jon-Al Duplantier

President, Rental Tools and Well Services

Jon-Al Duplantier is president, rental tools and well services for Parker Drilling. Prior to assuming this role, Mr. Duplantier served as the Company’s senior vice president, chief administrative officer and secretary. In 2017, he also served as interim chief financial officer of the Company. Mr. Duplantier joined Parker Drilling in 2009 as vice president and general counsel. Before joining Parker, he served in several legal and management roles at ConocoPhillips, including senior counsel, Exploration and Production; managing counsel, Indonesia; managing counsel, environmental; and general counsel, Dubai Petroleum Company, a subsidiary of ConocoPhillips at the time. Prior to joining ConocoPhillips, Mr. Duplantier served as a patent attorney for DuPont in Wilmington, Delaware.

Mr. Duplantier is a respected and trusted leader with over 20 years’ experience in the energy industry. He received his juris doctor degree from Louisiana State University in 1992 and a bachelor’s degree in chemistry from Grambling State University.

Bryan R. Collins

President, Drilling Operations

Bryan Collins is the president, drilling operations of Parker Drilling. He served as vice president – Arctic and Latin America operations from April 2016 to December 2016, and as Parker Drilling’s Vice President of Arctic operations from March 2013 to April 2016. Previously, he served as Parker Drilling’s global director of business development from February 2012 to March 2013.

Before joining Parker Drilling, Mr. Collins served in various operational and senior management roles at Schlumberger, Ltd., including vice president for drilling & measurements operations in Russia and over 6 years as Schlumberger’s global account manager for ExxonMobil’s worldwide drilling operations based in Houston, Texas.

Mr. Collins brings over 25 years in the upstream oilfield services business, serving in executive, operational, marketing, account management and general management roles in Russia, North America and South America. Mr. Collins holds a bachelor’s degree in computer science from Southwest Texas State University.

Jennifer F. Simons

Vice President, General Counsel & Corporate Secretary

Jennifer Simons was appointed vice president, general counsel & corporate secretary for Parker Drilling on April 2, 2018 to lead the company’s legal, compliance, and risk management organizations. Ms. Simons previously served as general manager of the company’s Atlantic Canada division. Under Ms. Simons’ leadership, the division received recognition for delivering safe, efficient, record-breaking operations with a culture of safety, teamwork, and integrity. Before relocating to Newfoundland in 2016, Ms. Simons served as managing counsel for the company’s Arctic Business Unit, having served in various legal roles of increasing responsibility since joining the company as corporate counsel in 2010.

Prior to joining Parker Drilling, Ms. Simons represented energy, engineering, construction, and real estate clients at Chamberlain Hrdlicka White Williams & Martin, a national law firm headquartered in Houston.

Ms. Simons received a juris doctor from University of Houston and a bachelor’s degree in Literature from University of Houston Clear Lake.

Nathaniel C. Dockray



Nathan Dockray was appointed Treasurer of Parker Drilling on April 13, 2020. Mr. Dockray has served as chief accounting officer of Parker Drilling from November 2017 through April 2020, as director of tax and financial planning & analysis of the Company from January 2014 through October 2017, as assistant tax director of the Company from December 2012 to December 2013, and as senior tax manager of the Company from April 2012 to November 2012. Prior to joining Parker Drilling, Mr. Dockray worked for PricewaterhouseCoopers LLP (PwC) from 2004 to 2012. While employed by PwC, Mr. Dockray focused on providing a broad range of tax consulting and compliance services to clients spanning multiple industries.

Mr. Dockray holds a master’s of science in accounting and a bachelor’s degree in business administration from Texas Tech University.

Contact the Board

Attn: Chairman
c/o Legal Department
5 Greenway Plaza, Suite 100
Houston, TX 77046
United States


General Counsel
Parker Drilling
5 Greenway Plaza, Suite 100
Houston, Texas
United States

Corporate Office

5 Greenway Plaza, Suite 100
Houston, Texas 77046
United States

Tel. +1 281-406-2000

Corporate Office