About us

Our mission

To deliver highly profitable and sustainable growth by identifying, capturing and developing the best drilling prospects available to industry with an uncompromising commitment to safe practices and ethical standards.

At a glance

Years in business
LLOG employees
Management's average years in industry
Deepwater prospects
1 %
Deepwater exploration success rate
Deepwater exploration wells drilled
1 %
Deepwater development success rate
Deepwater development wells drilled

LLOG is committed to maintaining the same high ethical and operational standards that have helped guide us over the past four decades.

Evolution to deepwater

Watch LLOG’s evolution from an onshore Gulf Coast company to an award winning deepwater Gulf of Mexico operator.

Executive leadership

Chief Executive Officer & President

Philip LeJeune

Philip has served as LLOG’s President and Chief Executive Officer since September of 2018. During his twenty-two years at LLOG, Philip has been instrumental in guiding the company through periods of transformational growth. Over the past year, he has executed an asset swap with an International Major, sold $1.375 billion in deepwater assets, and brought online ten deepwater wells. Previously, Philip held the roles of Chief Financial Officer and Treasurer and Vice President of Planning and Budgeting. Under his past leadership, LLOG executed asset sale transactions exceeding $4 billion and participated in financing transactions exceeding $3 billion. Philip additionally oversaw extensive deepwater drilling operations and the production of over 200 MMBBL from key deepwater assets. Prior to joining the company in 1997, Philip worked at Arthur Andersen, where he worked in the tax department and specialized in oil & gas taxation. He received a Bachelor of Science Degree in Accounting from Louisiana State University and his Master of Business Administration degree from Loyola University. Philip is an active member of the American Institute of Certified Public Accountants and the Society of Louisiana Certified Public Accountants.

Chief Operating Officer

Eric Zimmermann

Eric Zimmermann joined LLOG in 2007 and currently serves as the Chief Operating Officer. While at LLOG, Eric has served as the Company’s lead geologist in the Delta House area of Mississippi Canyon. He has also been instrumental in identifying key growth opportunities for LLOG and developing short-, medium-, and long-term strategy for execution. Prior to joining the Company, his 20-year career included work for key industry players such as BP and Dominion. Eric received his Bachelor of Science degree and Master of Science degree in Geology from Louisiana State University. He is a member of both the Texas and Louisiana Boards of Professional Geoscientists, is a Fellow of the Geological Society of London, and is a former president of the Southeastern Geophysical Society.

Chief Financial Officer & Treasurer

Philip Cossich

Phil joined LLOG in 2011 and currently serves as Chief Financial Officer and Treasurer. Before assuming his current role in September of 2018, Phil was the Vice President of Planning and Budgeting. Phil previously worked as an associate at Macquarie, where he focused on acquisitions and divestitures for upstream E&P companies. In addition, he was an analyst at Tristone Capital where he oversaw the acquisition and growth of established, profitable and cash generative companies. Phil received his Bachelor of Science degree in Business Administration from Washington and Lee University.

Chief Administrative Officer & Secretary

Kem Ducote

Kem has been with LLOG for twenty-seven years, having joined the company in 1992. She currently serves as the company’s Chief Administrative Officer and Secretary. Kem is responsible for cash management and investments. In addition, she oversees LLOG’s human resources, IT, and divestiture coordination. Prior to joining LLOG, Kem worked in private wealth management and corporate auditing. Kem earned her Bachelor of Business Administration degree from University of Louisiana Monroe. She is an active member of the Society of Louisiana Certified Public Accountants.

Chief Risk & Accounting Officer

James Bassi

James serves as the Chief Accounting Officer and Chief Risk Officer for LLOG. His key responsibilities include overseeing financial reporting and risk management for LLOG and its entities. James also aids in the execution of all financing transactions. Over his forty year industry career, James has held several meaningful roles. For 16 years prior to joining LLOG, James was employed by Callon Petroleum Company (NYSE: CPE) as the company’s Principal Accounting Officer and Vice President, Corporate Controller. He also has experience in the audit division at Arthur Andersen LLP. James received his Bachelor of Science in Accounting degree from the Mississippi State University. He is an active member of the American Institute of Certified Public Accountants and the Mississippi Society of Certified Public Accountants.

Senior Vice President of Engineering

Mike Vercher

Mike joined LLOG in June of 2008. Prior to his current position as Senior Vice President of Engineering, Mike served as the Vice President of Deepwater Projects. In addition, he worked as the lead project engineer at the Delta House project which was previously owned and operated by LLOG. Before joining the company, Mike served as General Manager of Deepwater Projects for Dominion Exploration & Production Company. While at Dominion, Mike aided in the development of several highly successful deepwater projects in the Gulf of Mexico. In addition, he also helped to coordinate offshore developments for ExxonMobil. Over his nearly forty-year career, Mike has also held engineering positions in the areas of reservoir production and development, facilities construction, drilling and completions. Mike received his Bachelor of Science degree in Petroleum Engineering from Louisiana State University in 1982.

Senior leadership


Barney Paternostro


Glenn Mediamolle, Jr.


Teresita Angelo

Deepwater Exploration

Jay Cole

Deepwater Projects

Jon Wood


Steve Stegeman

Exploration, Covington

Malloy French

Exploration, Houston

John Doughtie


Shaun Prestridge


Brett Smith

Legal Counsel

George Gilly

Marketing & Midstream

Jack Boelte


Rick Bullock