William Eppler

William Durand Eppler was the founder of Edge Copper Corp., founded in 2010, where the title held was Independent Director from 2010 to 2018.
Mr. Eppler was the founder of Sierra Partners LLC, founded in 2004, where the title held was Chief Executive Officer from 2014 to 2024.
Former jobs include President & Chief Executive Officer at Coal International Plc from 2005 to 2008; Chairman at NEMI Northern Energy & Mining, Inc. from 2007 to 2009; Lead Independent Director at HudBay Arizona Corp.
from 2012 to 2014; Managing Director at Headwaters MB LLC; Non-Executive Director at Frontier Mining Ltd. from 2010 to 2015; Director at Hycroft Mining Corp.
from 2007 to 2009; Managing Director-Metals & Mining at Chemical Securities, Inc.; Independent Director at Vista Gold Corp.
from 2004 to 2024; Managing Director at Capstone Headwaters LLC from 2016 to 2024; Independent Director at Golden Minerals Co. from 2009 to 2024; Director at Augusta Resources Corp.; Vice President-Corporate Planning at Newmont Corp.
from 1995 to 1998; Vice President-Corporate Development at Newmont Corp.
from 2001 to 2002; Member- Global Leadership Council at Colorado State University from 2001 to 2014; Vice President at Newmont Capital Ltd. from 2002 to 2004; President at New World Advisors LLC from 2004 to 2011; President at Newmont Indonesia LLC from 1998 to 2001; Member at American Institute of Mining, Metallurgical & Petroleum Engrs; Member at Society of Mining Engineers.
Education includes a graduate degree from Colorado School of Mines conferred in 1977 and an undergraduate degree from Middlebury College conferred in 1975.