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Providing mine engineering services to the world's mining industry since 1983.

Personnel

For over 35+ years Independent Mining Consultants
has been known for their professional mining expertise that is greatly enriched by a multi-disciplinary technical staff. The experience of IMC personnel is enhanced with use of the most modern computerized analytical tools and mine design capabilities.

IMC was started in 1983 by the following same three persisting principals. Since then the company has grown to a specialized group of 15 individuals. The principals' longevity in IMC demonstrates the reliable and rich mine engineering consulting experience that the company has to offer.

President – John M. Marek, P.E

M.S. Mining Engineering (Colorado School of Mines)  ‐  B.S. Physics (Colorado School of Mines)

40 years of experience in the minerals industry.  Mr. Marek shares responsibility of all aspects of project engineering and management of this multi-disciplined mining consulting group.  Financial analysis, mine planning, reserve verification and review are some of the areas of his expertise.  Project specialties include determination of mine operating policy integrating all disciplines and constraints.

Mr. Marek is a Registered Member of the SME (Society for Mineral, Metallurgy, and Exploration), is Certified as a PE in Arizona and Colorado, USA, and is a Qualified Person (QP) in Yukon, Canada.

Vice President – Herbert E. Welhener

B.S. Geosciences (Geology) (University of Arizona)

45 years' experience in mining industry.  Mr. Welhener shares the responsibility of project management and engineering of this mine consulting group.  Areas of expertise include mine planning, mine finance and mine design for all sizes of mining operations.

Mr. Welhener is a Registered Member of the SME (Society for Mineral, Metallurgy, and Exploration), and is a QP Member of MMSA (the Mining and Metallurgical Society of America).

Vice President – Michael G. Hester

M.S. Mining Engineering (University of Arizona)  ‐  B.S. Mining Engineering (University of Arizona)

40 years of experience in the minerals industry.  Mr. Hester’s responsibilities include, but are not limited to, management of mining feasibility studies, ore reserve estimation and verification, and computer applications to mine planning.

An essential Committee Member at the SME Resources and Reserves Committee who is actively pursuing updating USA regulation on mineral resources and reserves Mr. Hester is our foremost expert on ore reserve / resource estimation.

Mr. Hester is a Fellow (FAusIMM) of the AusIMM (Australian Institute of Mining and Metallurgy) and a Registered Member of the SME (Society for Mineral, Metallurgy, and Exploration).

Partner – Joseph C. McNaughton, P.E.

B.S. Mining Engineering (University of Arizona)

Professional Engineer with 6 Years in the mining industry. Mr. McNaughton has previously served in chief engineer capacity at operating mines and has been the lead and managing engineer for pre-feasibility / feasibility project level studies at the company. His specialties include financial analysis and mine planning.

He has also been instrumental in the early mine planning for the feasibility study of the now producing Haile Gold Mine.

Mr. McNaughton is a Professional Engineer and shares responsibility in the management of the consulting group.

Partner – Anh Nguyen, P.E.

B.S. Mining Engineering (Colorado School of Mines)

Professional Engineer with 6 Years in the mining industry. Mr. Nguyen specializes in mine planning for surface and underground mines and managing projects for the group. He regularly collaborates with and supplements undermanned mine engineering staff at operating mines. His forte is the application of computer technology to mining activities.

Mr. Nguyen is a Professional Engineer and shares responsibility in the management of the consulting group.

Partner – Jacob W. Richey, P.E.

B.S. Mining Engineering (Colorado School of Mines)  ‐  with Minor in Mathematics

Professional Engineer with 9 years in the mining industry. Mr. Richey has fulfilled the role of acting chief engineer at operating mine and has supervised feasibility level projects in the United States and abroad. Areas of expertise include the optimization of mine planning.

Mr. Richey is a Professional Engineer and shares responsibility in the management of the consulting group.

Geological Engineer – Yvette Gengler

B.S. Geological Engineering (University of Arizona)

35 years of experience in the mining industry. Mrs. Gengler is a veteran member of the IMC consulting group and has been with the group since near its formation. She has been involved on a large number of the projects in IMC's extensive project portfolio. Her responsibilities include the statistical analysis of assay and geological information of exploration and blast hole samples as well as the development of project mineral resource and reserve estimations.

Mrs. Gengler is a Registered Member of the SME (Society for Mineral, Metallurgy, and Exploration).

Thank You!

We wish to thank the mining community for your support during the past 35+ years and IMC looks forward to serving our existing and new clients well into the future.

The technical staff of Independent Mining Consultants has worked very well together for over three decades.  The synergies of talent within the organization are tremendous.  The mining engineers work directly with IMC’s data analysts, and the geologists and draftsmen have good working relationships.  IMC’s technical documents and illustrations are most professional and have been reviewed and accepted by Canadian and U.S. financial and regulatory agencies.

Our Recent Projects


View our Project Map »

  • La Yaqui - Cerro Pelon

    Alamos Gold Inc.

    Sonora, Mexico
  • Arid Operations

    Gold Fields Mining Corp

    California, USA
  • CEMEX Gypsum

    National Gypsum Co.

    Arizona, USA
  • Dragoon Marble Quarry

    Gadsden Sonora Holdings LLC

    Arizona, USA
  • Mount Hope

    General Moly Inc.

    Nevada, USA
  • East Feldman Pit

    National Gypsum Co.

    Arizona, USA
  • Marathon Project

    Stillwater Mining Co.

    Ontario, Canada
  • La Herradura

    Fresnillo PLC

    Sonora, Mexico
  • Orogrande Garnet

    Orogrande Garnet Co.

    New Mexico, USA
  • Pinto Valley

    Capstone Mining Corp.

    Arizona, USA