Navigation Petroleum Team

Randall Hicks, Production Engineering Manager


Randall Hicks has 27 years of industry experience providing operations management and engineering in a wide range of basins across the US.  Some of the major areas include the Piceance, Permian, Gulf Coast and Mid-Con Basins.  Most recently, from 2013-2019 at Vanguard Natural Resources, he rose from Sr. Operations Engineer for the Permian to Operations Manager, responsible for conventional and unconventional production in horizontal Woodford wells and deep, highly corrosive Smackover wells in Southern Alabama.

Randall was Sr. Operations Engineer at Layline Petroleum from 2011-2013 providing drilling, completions and production engineering for the AWP Olmos field in South Texas until its sale in 2013.  He was Operations Manager for Krescent Energy from 2006-2011 where he managed operations in South Louisiana and Wilcox/Yegua and horizontal Austin Chalk operations in East Texas.  Previously, from 1993-2006, Randall worked for Halliburton in various leadership roles including Field Engineer, Operations Coordinator, Instructor and as a Drilling Consultant in Williston, Piceance, Siberia, and Iraq.

Randall holds a Bachelor of Science in Petroleum Engineering from Texas A&M University in College Station.

Russ Wilcox, Production Superintendent

Russ Wilcox has been in the oil and gas industry for 9 years. He started in the DJ Basin and then transferred to the Permian Basin for Carrizo Oil and Gas before coming to work at Navigation Petroleum. Russ has supervised production operations for most of his career, and he has also overseen the construction many oil and gas facilities including produced water and gas gathering pipelines.  He has been involved at most every level of keeping oil and gas moving both from a hands-on perspective to leading a team of in-field professionals.

Mike Sheahan, Geological Manager

Mike Sheahan has 11 years of experience in the upstream oil and gas industry.  In 2015, he co-founded GeoWolf Energy, a prospect generation and consulting company.  Mike was a Geologist at Devon Energy where he was involved in onshore Gulf Coast horizontal tight gas, unconventional programs, and offshore Gulf of Mexico deep water exploration and development.

Mike holds a Bachelor of Science in Geology from Southern Illinois University and a Master of Science in Geology from the University of Louisiana.  Mike is a veteran of the Illinois Air National Guard.

Lisa Ressling, Office Manager

Lisa Ressling has more than 20 years of experience in the oil and gas industry.  She has held positions at Parker Drilling, Wild Well Control, and seismic acquisition and land-focused companies.  Her position in HR and HSE document control and management systems makes her a valuable asset to the Navigation Petroleum team.  She is a Certified Auditor with specific training on !SO 9001, 14001, and OSHA's 18001.

Lisa has a Bachelor of Arts in Public Relations from the University of Texas at Dallas.

Jessica Brocato, Controller

Jessica Brocato joined Navigation Petroleum, LLC in September 2019 as Controller. She has over 9 years of oil and gas experience in various accounting functions for multiple operated and non-operated entities.  Jessica previously worked in the Raton Basin, the Rocky Mountain region and Gulf Coast region. 


Jessica has a Bachelor of Business Administration in Finance and a Master of Business Administration in Accounting and Management from Texas A&M University – Corpus Christi.