Michael J. Hall


Michael J. Hall is the president of EDCON-PRJ and the principal designer of the company’s extensive software library.  His early experience includes the design of seismic processing systems and the first commercial shipborne gravity processing system.  Mr. Hall played an essential role in designing and implementing EDCON-PRJ’s two- and three- dimensional gravity and magnetic inverse modeling packages.  He is recognized in the exploration industry for his comprehensive grasp of geophysical principles, computer programming, hardware and software system design, and his effective application of computer technology to geophysical problems.  He has co-authored a number of papers presented to the Society of Exploration Geophysicist.  Mr. Hall received a B.A. in mathematics from St. Thomas University, Houston, Texas.

Alan T. Herring


Alan T. Herring is a co-founder of EDCON-PRJ.  Improving the resolution of gravity and magnetic measurements is central to his continued interest in using gravity and magnetic survey data to solve geologic problems.  Mr. Herring has been largely responsible for initiating a number of technical innovations, including advances in shipborne data acquisition and processing.  His work at EDCON-PRJ to improve the Eötvös correction led to the first use of GPS with a high-resolution marine gravity system and the introduction of one-second data sampling for marine gravity.  He has presented papers to the Society of Exploration Geophysicists and has co-authored papers in Geophysics and elsewhere. He served as Associate Editor of Geophysics for gravity from 1974-1975.  Mr. Herring received an M.S. and B.S. in geophysics from Stanford University.

Michael L. Hobbs


Michael Hobbs is EDCON-PRJ’s VP of Operations.  From 2011 through 2016, he served as the company’s VP of Airborne Services.  Prior to that, Mr. Hobbs conducted helicopter and fixed-wing based airborne surveys as a contractor for Pearson, deRidder and Johnson (PRJ) and then for EDCON-PRJ from 2005 to 2010.  He was a data acquisition technician during that period and was instrumental in the development of high-resolution aeromagnetic surveys using ultralight aircraft.  Mr. Hobbs holds a degree in Geology from Colorado State University and has over 40 years of experience in the earth sciences including mineral and oil and gas exploration, ground geophysics, permitting and compliance, and operations management.

Tom Nelson


Tom Nelson is EDCON-PRJ’s Marine Operations Manager.  He has over 16 years in marine seismic operations with Western Geophysical and Western Atlas.  In 1987 he became a Vessel Manager where he managed the development of multi-streamer operations and was also key in developing the first fiber-optic seismic streamer.  Tom joined LCT in 1997 and quickly became the Marine Operations Manager shortly after the company was purchased by Fugro.  He remained the Marine Operations Manager after the company was purchased by CGG and then again with Xcalibur Multiphysics.  Tom has extensive experience in all aspects of marine gravity and magnetics data acquisition.  He holds a BS in Management from Eastern Illinois University.

Darrel L. Landis


Darrel Landis joined EDCON-PRJ 1985.  He has since worked in all aspects of the company’s gravity and magnetic services including acquisition, processing, and interpretation of airborne, land, and marine.  He has developed a high level of skill and expertise in gravity and magnetic data evaluation and processing.  Mr. Landis has a Bachelor Degree in Geological Sciences from the University of Washington, Seattle.

Nathan Campbell

Nathan Campbell


Nathan Campbell joined the EDCON-PRJ team in 2022.  He graduated from Oklahoma State University with a Master’s degree in Geology – Geophysics and completed a Bachelor’s degree in Music Composition at the University of Texas – San Antonio.  He is a certified drone pilot with 4 years field experience in collecting magnetic, LiDAR, and photogrammetric data throughout the country.  Mr. Campbell supports the gravity and magnetic processing effort for EDCON-PRJ and provides project management support for airborne and UAV projects.  He is a published author for his research on the application of smartphone sensors for geophysical investigation.