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  • Corporate

    GSV geologists conducting peer field review

Technical Team

Mac Jackson

Chief Geologist


Mr. Jackson has over 20 years experience as an exploration geologist, including 8 years with Newmont. During his tenure with Newmont, Mr. Jackson was a significant contributor to the discovery of the West Leeville and Turf deposits, both of which are on the Carlin Trend, and the Fiber Line deposit at the Twin Peaks complex. Mr. Jackson has been with the Company since July 26, 2011 and has been instrumental in expanding its understanding of the stratigraphy and structural geology and advancing new target opportunities on the Railroad-Pinion Project. Mr. Jackson is a certified professional geologist (CPG - 11661) with the American Institute of Professional Geologists (January 2014) and holds a Master of Science degree from the University of Nevada (June 1988).

Don Harris

General Manager


Don Harris has 29 years’ experience as a mine development geologist and manager, including 17 years with Newmont, where Mr. Harris was a significant contributor to the resource and reserve growth at Gold Quarry and Emigrant Mines. Outside of Newmont, Mr. Harris has contributed to the mine and resource development at the Hycroft mine (Hycroft) and the Pan mine (Midway). Over his career, Don has held a multitude of positions, including Manager of Nevada Surface Geology for Newmont, Vice President of Advanced Projects at Midway Gold, and Director of Exploration at Hycroft Mining. These positions have led to the successful development and/or production of over 30 million ounces gold and 300 million ounces silver. . Since joining GSV in 2017, he has been responsible for guiding the Dark Star and Pinion Deposits towards future mine development. Don has a Bachler of Science Degree in geology from the University of Wyoming and a Master of Science Degree in geology from Northern Arizona University. Don is a Registered Geologist with SME (146776) and a qualified person as defined by NI-43-101.

Steven Koehler

Manager of Projects, Senior Geologist & QP


Mr. Koehler has 28 years of experience designing and implementing large exploration programs on the Carlin and Cortez Trends of northern Nevada. Over his career, Steve has held senior level exploration positions with Newmont, Placer Dome and Miranda Gold. At Newmont, Mr. Koehler managed and contributed to exploration programs on the northern Carlin Trend that led to the multi-million-ounce Leeville discovery, in addition to discoveries at Fence / Pete Bajo, Four Corners and Hardie Footwall Extension. At Placer Dome, Mr. Koehler played a key role in the Cortez Hills discovery, and led the reinterpretation of Cortez District carbonate stratigraphy that resulted in the identification of new exploration opportunities throughout the district. As Chief Geologist with Evolving Gold, Mr. Koehler managed the Nevada exploration team that expanded the Arch gold discovery. Earlier in his career, Steve was directly responsible for the discovery of a rare-metal pegmatite district in northern Wisconsin. Mr. Koehler earned a B.Sc. degree in geology from the University of Wisconsin River Falls, he is an AIPG Certified Professional Geologist (#10216), and is a Qualified Person as defined by NI 43-101.

Mark Laffoon, P.E.

Project Manager & QP


Mark Laffoon has 39 years of experience as a mining engineer, mine foreman, mine manager, development manager, project manager, and construction manager. These engineering and management level positions were held with Duval, Gold Fields, Santa Fe Pacific Gold, Newmont, and Barrick Gold in the western United States. At Santa Fe Pacific Gold, Mr. Laffoon managed and contributed to the construction and operation of the Mule Canyon Mine near Battle Mountain, Nevada which led to the first whole ore highway shipments to processing facilities at Lone Tree and Twin Creeks. At Newmont, Mr. Laffoon was responsible for the mine development and the surface mine operations engineering department along the Carlin trend which contributed to the opening of the Gold Quarry mine below the James Creek tailings facility, the Pete deposit, the Tara/Bootstrap deposits, Tusc deposit, Carlin deposit, the Beast/Genesis deposits, the Lantern deposit, and the Emigrant deposit. During Mr. Laffoon’s tenure with Barrick Gold, he contributed to the opening of the Cortez Hills Open Pit facilities/operations, managed the Arturo Joint Venture with Goldcorp, and was the Construction Manager of the Goldrush underground portal surface facility. Mr. Laffoon earned a Bachelor of Science degree in mine engineering from Montana Tech of the University of Montana, he is a certified Professional Engineer in Nevada (#08708), is a Registered Mine Engineer and QP with the SME (#1818400), and is a Qualified Person as defined by NI 43-101.

Melanie Newton

Staff Geologist


Ms. Newton has 2+ years’ experience as a geologist on the Carlin Trend. At the Railroad-Pinion property, Ms. Newton contributed to the development of Dark Star and Pinion sediment-hosted gold deposits, and she contributed to the expansion of the North Bullion, Sweet Hollow, and Pod sediment-hosted gold deposits. Ms. Newton contributed to the development of Arturo sediment hosted gold discovery in 2014 with Barrick. Ms. Newton is skilled at identifying structural controls, hydrothermal alteration, folding/faulting, and alteration products associated with gold mineralization and hydrothermal fluid flow. She is experienced with managing exploration and development drill programs with multiple drill rigs, and contractors. Her technical work has included geologic mapping, cross-section generation, logging of drill holes, compilation and interpretation of multiple data sets for target identification, 3D-computer modeling of gold deposits leading to resource calculations, field sampling, and experience with MapInfo, ArcGIS, Micromine and Vulcan software. Ms. Newton graduated Summa Cum Laude with a Bachelor of Science Degree in geology from Western Kentucky University in December of 2011, and a Master of Science Degree in geology from the University of Nevada, Las Vegas in December 2015 where she completed her thesis on “Characterization of Gold and Related Mineralization at the North Bullion Fault Zone, Railroad Project, a Nevada Carlin-type Gold Prospect.”

Jesse Heavin

Drilling Services Manager


Jesse Heavin has 15 years’ experience as a drilling services professional with a back ground in both technical mining (development) and exploration (early stage) drilling for both surface and underground projects. He is responsible for overseeing all drilling related activities for Gold Standard Ventures. He worked on successful teams at Barrick Exploration (Gold Rush, Bald Mtn., Ruby Hill), Barrick North America (Cortez Hills, Pipeline), Placer Dome (Cortez, Bald Mountain), Echo Bay (Round Mountain Gold Corp.), he is credited with implementing best practices contributing to several million man hours worked achieving triple zero operations and drilling related savings exceeding $10 million dollars. Mr. Heavin has managed drill projects which included 35 surface/UG rigs and12 pieces of earth work equipment, two coreshed logging/cutting warehouse facilities with 20 geotechs, two surveyors responsible for pad/sump design, construction, and reclamation. Mr. Heavin is working on his B.S. in Business Management. He has an AAS in Business Administration, General Business, CS in Drilling fluids management, GIS ArcView, DICAT drilling standards.

Steve Moore

Senior Geological Consultant


James Wright

Senior Geophysical Consultant


Mr. Wright has a B.S. degree (Honors) in Geophysics from the University of Arizona (1973) and a M.Sc. in geophysics from Stanford (1975). He has over 40 years of varied experience applying geophysical techniques to exploration for a wide variety of commodities including gold, uranium, base metals, coal, lithium and potash. His career started with Phelps Dodge Corporation and continued with St. Joe Minerals, Sulpreto Minerals, Novamin Resources, Breakwater Resources and Newmont Mining Corp. Interspersed with the corporate assignments were sixteen years as a consultant, a position he holds today.

Gary Simmons

Senior Metallurgical Consultant


Mr. Simmons has more than 35 years of experience with mining companies – including Newmont Mining Corporation, where he was Senior Technical Director of Metallurgy and Technology.


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