Golden Minerals Company

Jeffrey G. Clevenger
Chairman and Chief Executive Officer

Mr. Clevenger has more than 40 years of mining experience, primarily at a senior management level with Apex Silver Mines Limited, Cyprus Amax Minerals Company and Phelps Dodge Corporation. From 2004 to 2009 he served as Director, President and Chief Executive Officer of Apex Silver Mines where he led the construction of the $1 billion San Cristobal mine in Bolivia. From 1992 to 1999, while reporting to the Chairman and CEO of Cyprus Amax, with active participation at the Board level, Mr. Clevenger was Chief Operating Officer and President of a large integrated copper producer (one billion pounds per annum) and the world's largest molybdenum producer. He was one of a five member Policy Committee for the parent Cyprus Amax Minerals Company and responsible for 4500 employees with producing assets in the U.S., Europe, Chile and Peru. During his tenure at Cyprus, copper production increased by more than 65% while costs lowered by nearly 30%. Mr. Clevenger led the effort for Cyprus that resulted in being awarded Peru's first tender in the privatization process, acquiring the Cerro Verde property; and Chile's first tender in the privatization process through the Cyprus acquisition of El Abra. He led the Cerro Verde $230 million modernization and expansion, which resulted in increasing production from 60 to 150 million pounds and decreasing costs from $0.80 to $0.45 per pound over a five year period; and the $1 billion construction of the world's largest SX/EW at El Abra, which was completed ahead of schedule and under budget. Mr. Clevenger was responsible for exploration activities ($15 - $40 million per year), primarily conducted in South America, Zambia, Papua New Guinea and Australia.

While at Phelps Dodge Corporation from 1989 to 1992, Mr. Clevenger held the position of President and GM of Phelps Dodge Morenci Inc., which was a joint venture between Sumitomo and Phelps Dodge. There he managed an annual operating budget of $400 million and capital budget of $100 million and oversaw an aggressive exploration program and analysis of the Safford copper district. While at Morenci he led several cost reduction initiatives, most notably replacing the rail system with the installation of a $50 million in pit crushing and conveying system. From 1987 to 1988, Mr. Clevenger was the Assistant General Manager at Chino Mines Company, a joint venture between a subsidiary of Mitsubishi Mining and Phelps Dodge, where he had responsibility for all mining, concentrating, smelting, leaching and engineering functions, including 1100 employees. From 1986 to 1987, he was General Superintendent of Phelps Dodge Morenci, where his responsibilities included mining, engineering and administrative activities of the largest operating mine in North America. While at Phelps Dodge from 1986 to 1973, Mr. Clevenger had progressive career growth from Engineer to Mine Superintendent at Tyrone.

B.S. Mining Engineering with honors, New Mexico Institute of Mining and Technology
Advanced International Senior Management Program (AMP; ISMP), Harvard University


Warren Rehn 

Warren M. Rehn

Mr. Rehn has been with Golden Minerals since February 2012, most recently serving as Senior Vice President of Exploration and Chief Geologist. He has over 30 years of mining and mineral exploration experience. He was previously employed by Barrick Gold Exploration, most recently as the Chief Exploration Geologist for the Bald Mountain and Ruby Hill Mines. In this position he was responsible for planning and supervising gold exploration programs for intrusion-related and Carlin style deposits, with recent significant discoveries at both mine sites. Prior to joining Barrick, Mr. Rehn was a consultant with Gerson Lehman Group and for 10 years was a co-owner in a specialty geochemical consulting firm. Mr. Rehn has also worked as an exploration geologist with Placer Dome Exploration, Bear Creek Mining, Cyprus Amax, Bema Gold, Noranda Exploration and Gold Fields Mining Corporation. He has considerable exploration experience in the United States, Canada and throughout Latin America.

Bachelor of Science in Geological Engineering from the University of Idaho
Master of Science in Geology from the Colorado School of Mines


Deborah J. Friedman
Senior Vice President, General Counsel and Corporate Secretary

Ms. Friedman has over 25 years of experience in the mining industry. For 16 years she served in various positions in the law departments of Cyprus Amax Minerals and AMAX Gold, including General Counsel and Associate General Counsel at Cyprus and General Counsel at AMAX Gold. As a partner at Davis Graham & Stubbs LLP, Ms. Friedman represented major, mid-tier and junior mining companies in public and private equity and debt offerings, commercial and project financings, securities compliance and acquisitions and divestitures both in the United States and internationally. Ms. Friedman's practice has included counseling boards of directors and senior management and effective management of complex finance and acquisition and divestiture transactions. She is experienced in securities compliance and corporate governance matters.

Ms. Friedman is experienced in all phases of the mining business, from exploration through development and operations. She has served as lead counsel in the negotiation and documentation of exploration joint ventures and the development of critical contracts for engineering, construction and infrastructure services. She has special expertise in negotiation and documentation of complex domestic and international transactions, including public, private and project financings, acquisitions, divestitures, business combinations and joint ventures. Ms. Friedman has handled finance, transactional and operations matters for mining projects in the United States, Canada, Latin America including Chile and Bolivia, Australia, New Zealand, Papua New Guinea, Russia and Ghana.

B.A. University of Illinois
J.D. University of Michigan



Robert P. Vogels
Senior Vice President and Chief Financial Officer

Mr. Vogels was previously the Vice President of Finance and Controller for Apex Silver, joining the company in January, 2005. Prior to that Mr. Vogels served as corporate controller for Meridian Gold Company.

During his 25 years in the mining industry, Mr. Vogels has held numerous accounting, finance and tax positions at the corporate and operations level, and has been involved in numerous large scale mine development projects. Mr. Vogels' extensive operations, corporate and international experience includes previous positions as corporate controller of Meridian Gold, site controller of Phelps Dodge's El Abra mine in Chile and Project Controller of Inco's Goro project in New Caledonia.

Mr. Vogels began his career in public accounting where he earned his CPA certification.

B.Sc. and MBA degrees from Colorado State University
CPA Certification (inactive)
Spanish proficiency



Andrew Sharp
General Manager, Velardeña Properties

Mr. Sharp brings over 25 years of global mining exploration, mine planning, mine operations and general mine management experience to his role at Golden Minerals, most recently serving as Vice President of Technical Services for Silver Standard Resources. In this role Mr. Sharp led an eight-month turnaround of operations at Silver Standard's Pirquitas Mine in northern Argentina, achieving a 24 percent reduction in costs while maintaining historically high metals production. Previously, Mr. Sharp served as General Manager of Great Panther Silver's Minera Villa Seca S.A. de C.V. subsidiary where he was responsible for the 700-employee Guanajuato underground mine in Mexico as well as its plant, administration and safety. Earlier, Mr. Sharp served as Manager of Technical Services for Projects and as Manager of Mine Planning in Mexico for Pan American Silver. 

Bachelor of Engineering (Second Class Honours) from the Western Australian
School of Mines



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