Mark K. Stover
President & CEO
Mr. Stover joined CL&F in June 2013, as Senior Vice President – Hardrock Exploration and Business Development, evolving to Senior Vice President in 2017, and was recently appointed President and CEO in January 2026. Mr. Stover is also on the Board of Directors at CL&F.
Prior to CL&F, Mr. Stover served as Executive Vice President-Exploration, Land and Business Development for PetroQuest Energy, where he held various executive positions throughout his 10 plus years of service.
He began his career in 1986 with the offshore divisions of Tenneco Oil Company in Lafayette, LA, which was acquired by Chevron USA during 1988. He was employed with Chevron until he resigned in late 1993 to join Newfield Exploration located in Houston. While at Newfield Exploration, Mr. Stover presented various exploration and acquisition opportunities to CL&F during 1994 and beyond, which led to numerous successful discoveries that build a long-term business relations with CL&F.
Mr. Stover earned a Bachelor of Science degree in Geology from Waynesburg University (PA) in 1984 and a Master of Science degree in Geophysics from Wright State University (OH) in 1986. He is a graduate of Harvard’s Business School-Executive Education AMP 179, Class of 2010.
He is a long-term Registered Texas Professional Geoscientist and a longtime active member of both the American Association of Petroleum Geologists (AAPG) and the Society of Exploration Geophysicists (SEG). Mr. Stover serves on the Louisiana Oil & Gas Association Borad of Directors and the National Resources Management Board of Directors.
Mark H. Parrott
Vice President - Geosciences
Mr. Parrott joined CL&F in June 2014, as Exploration Manager of Business Development. Prior to CL&F, Mr. Parrott was the Exploration Manager for PetroQuest Energy. Mr. Parrott’s additional industry experience include technical positions working a variety of unconventional and conventional basins with Cockrell Oil, Southwestern Energy, Hess, Chevron, and Tenneco Oil. Mr. Parrott earned a Bachelor of Science degree in Geology from the University of Massachusetts and a Master of Science degree in Geophysics from Purdue University. Mr. Parrott is a Registered Texas Professional Geophysicist and an active member of SEG.
Tammy K. Willis
Offshore Land Manager
Ms. Willis joined CL&F in 2002 as a Landman focused primarily in the offshore Gulf of Mexico. Prior to CL&F, she served as an Offshore Landman at Seneca Resources Corporation after having held various land positions at El Paso Corporation, Sonat Exploration Company, and Zilkha Energy Company.
Allison G. Johnson
RPL
Onshore Land Manager
Charles F. Seibert IV
CPA
Treasurer & Corporate Secretary
Mr. Seibert joined CL&F in December 2008. Prior to joining CL&F, Mr. Seibert was employed as a Tax Manager with Ernst & Young LLP from 2005-2008 and as a Senior Tax Associate with KPMG LLP from 2000-2004. He graduated from the University of New Orleans in 2000 with a Bachelor of Science Degree in Accounting and earned his CPA in 2001.
Robert G. Linscombe
(Greg)
Fee Land Manager
Mr. Linscombe joined CL&F in 2005. He was previously with the Louisiana Department of Wildlife and Fisheries, where he served for 33 years, managing state wildlife refuges and designated wildlife management areas across the Louisiana coast, integrating both mineral operations and wetlands protection mandates. Mr. Linscombe has worked with most state and federal agencies throughout his career as well as many university researchers in Louisiana involved with marsh ecology and management. He holds a Bachelor of Science Degree in Forestry and Game Management and Masters of Science Degree in Wildlife Management from Louisiana State University. He is a Certified Wildlife Biologist and has published over 40 scientific papers.