about-sierra

Igor Gonzales , , , President and Chief Executive Officer

Mr. Gonzales is from Cusco, Peru and has more than 30 years of experience in the mining industry. He was with Barrick Gold Corporation from 1998 to 2013, most recently as Executive Vice President and Chief Operating Officer. Between 1980 and 1996, Mr. Gonzales served in various roles with Southern Peru Copper Corporation. Mr. Gonzales has a Bachelor of Science degree in Chemical Engineering from the University of San Antonio Abad in Cusco, Peru, and was a Fulbright Scholar at the New Mexico Institute of Mining and Technology, where he earned a Master of Science degree in Extractive Metallurgy.

Ed Guimaraes , , , Chief Financial Officer

Mr. Guimaraes held progressive senior management positions with Aur Resources Inc. (Aur) between 1995 and 2007, ultimately serving as Executive Vice-President, Finance and Chief Financial Officer. In this position, Mr. Guimaraes was a member of the senior management team that executed the acquisition and integration of Aur by Teck Resources Ltd. in a takeover valued at $4.1 billion. Prior to working at Aur, Mr. Guimaraes worked in the Toronto mining group of PricewaterhouseCoopers. Since 2007, Mr. Guimaraes has worked as a consultant in the resource industry and is currently a director of several publicly listed mining companies. He is a Chartered Professional Accountant (CPA, CA) and holds a Bachelor of Arts in Administrative and Commercial Studies from the University of Western Ontario.

Gordon Babcock , , P.Eng. , , Chief Operating Officer

Mr. Babcock is a second generation Professional Mining Engineer with over 34 years of experience in mine production management, project development, engineering, exploration and mine consulting in precious, base metals and aggregate operations in the Americas. He was most recently COO at Jaguar Mining and has previously worked for Nyrstar, Breakwater Resources, Coeur Mining Inc., Milpo, The Hochschild group in Peru, Muscocho Explorations, and The Noranda Group. Gordon holds a degree in Mining Engineering from Queen’s University and is an active member of the Association of Professional Engineers of Ontario, CIM and AIME.

Sergio Ramírez , , , General Manager, Dia Bras Mexicana

Mr. Ramirez, Metallurgist and Mining Engineer, graduated from the School of Mines at the University of Guanajuato, Mexico in 1968 and worked with Grupo Mexico from 1968-2002 achieving the position of Director of Mining Operations and Exploration (1989-2002). From 2002-2006 he was the Director of State Programs within the Ministry of Economy, for the Federal Government of Mexico. Most recently, Mr. Ramirez was Director of Mining Operations for First Majestic Silver Corp. (2007-2012).

Alonso Lujan , , , Vice President Exploration

Mr. Lujan is a Geological and Mining Engineer with over 26 years international experience in mineral exploration with a positive track record for increasing companies' resources, output and company value. Mr. Lujan most recently spent 6 years with Mata-Trafigura as the General Manger having been promoted from Exploration and Operations Manager. While there he oversaw the discovery and commissioning of the Magdelana Project with potential for 50 million tonnes within 2 years and helped to double production as well as optimize and reduced costs. Prior to that he worked with Hochschild Mining for 5 years and Minas de Bacis SA de CV for 14 years where he helped to also increase resources, increase output and reduce costs.

Mike McAllister , , , Vice President, Corporate Development

Mr. McAllister is a mining specialized investor relations professional who joined the sector in June, 2010.He has worked for companies such as Avion Gold Corp., which was sold to Endeavour Mining, as well as with Savary Gold, Alder Resources and Black Iron in their Investor Relations and Corporate Development programs. Previously Mr. McAllister worked at BMO Capital Markets in the Investment Banking, Metals Mining Group.