International Institute of Minerals Appraisers

P.O. Box 19529, Boulder, Colorado, USA 80308

Executive Committee

The Executive Committee oversees and manages the operations of the Institute.

John B. Gustavson

IIMA President

  • Mineral Appraiser LLC
  • 2265 Hillsdale Circle
  • Boulder, Colorado, USA 80305
  • Phone No: 1-303-818-5992
  • Fax No: 1-303-499-7637
  • Email: johngustavson1@aol.com

David Shetler

IIMA Vice-President

  • Black River, Ltd.
  • 250 W. Nottingham, Suite 310
  • San Antonio, Texas, USA 78209
  • Phone No: 1-210-736-9991
  • Fax No: 1-210-736-9992
  • Email: jds2@bentrockoil.com

Darwin Werthessen

IIMA Secretary

  • 674 Summer Street
  • Bridgewater, Massachusetts, USA 02324
  • Phone No: 508-846-6799
  • Cell No: 508-846-6799
  • Email: dwerthessen@gmail.com

Charles G. Howard

IIMA Treasurer

  • Howard Engineering, Inc.
  • 411 Main Street
  • Mount Hope, West Virginia, USA 25880
  • Phone No: 1-304-877-6665
  • Fax No: 1-304-877-6664
  • Email: MiningEngineerWV@gmail.com

Timothy S. Knobloch

IIMA Past President

Previous Years Executive Committee

Years President Vice-President Secretary Treasurer Past President
2020 John Gustavson David Shetler Darwin Werthessen Charles Howard Tim Knobloch
2019 Tim Knobloch John Gustavson David Shetler Charles Howard John Manes
2018 Tim Knobloch John Gustavson David Shetler Charles Howard John Manes
2017 John J. Manes John B. Gustavson Timothy S. Knobloch Charles G. Howard Fredric L. Pirkle
2016 John J. Manes John B. Gustavson Timothy S. Knobloch Charles G. Howard Fredric L. Pirkle
2015 John J. Manes John B. Gustavson Timothy S. Knobloch Charles G. Howard Fredric L. Pirkle
2014 John J. Manes John B. Gustavson Timothy S. Knobloch Charles G. Howard Fredric L. Pirkle
2013 Previous Years through 1992 Under Research...