Mr. Ball joined Goldcorp in May 2013, as Executive Vice-President of Projects and Capital Management, and in December 2014 was appointed Executive Vice-President of Corporate Development and Capital Projects. He served as Chief Financial Officer and Executive Vice-President of Corporate Development from March 2016 to October 2017. Prior to joining Goldcorp, Mr. Ball served as Executive Vice-president and Chief Financial Officer of Newmont. Over his 19 years with Newmont, Mr. Ball worked in internal audit, finance, treasury, operations/project and investor relations before joining the executive team as Chief Financial Officer. Prior to Newmont, Mr. Ball was a manager with PricewaterhouseCoopers in Durban, South Africa. He qualified as a chartered accountant from the Institute of Chartered Accountants of South Africa and as a Certified Public Accountant in the USA.
Senior VP and Chief Operating Officer
Darren Hall has over 30 years of experience in the mining industry with a track record of increasing production, reducing costs, improving capital effectiveness, and promoting health, safety and business excellence. Since August 2017, he has been Principal at Hall Mining Services, a provider of operating and technical assessments, among other things, to the international mining industry. Mr Hall previously he served as Chief Operating Officer of Kirkland Lake Gold, which acquired Newmarket Gold, where Mr. Hall served as the Chief Operating Officer throughout 2016. Prior to Newmarket Gold, Mr. Hall worked for Newmont Mining Corporation where he held roles of increasing responsibility throughout the organization for almost 30 years. Mr. Hall graduated with a Bachelor of Mining Engineering (Hons) from the Western Australia School of Mines in Kalgoorlie.
Senior VP and Chief Financial Officer
John Seaberg has held a number of roles within the mining industry throughout his career. Since June 2018, he has been the Executive Chairman of Paramount Gold Nevada Corp. Mr Seaberg was previously Senior Vice President of Strategic Relations at Klondex Mines Ltd. In this role Mr. Seaberg was responsible for global investor relations and corporate development initiatives as an acting member of the senior executive team. Prior to Klondex, Mr. Seaberg was employed for more than 10 years by Newmont Mining Corporation where he last held the position of Vice President, Investor Relations. Mr. Seaberg has an MBA from the University of Denver.
VP, Corporate Development and Investor Relations
Ryan King brings an established approach to business in the natural resource sector, with specific and targeted applications for delivering shareholder value in the mining industry. Ryan has over 15 years of experience in increasingly senior capacities in capital markets in the resource sector and was responsible for leading the investor relations activities for Newmarket Gold, as the company completed a $2 billion transformational merger with Kirkland Lake Gold. Before joining Newmarket Gold, Ryan was involved in starting Terrane Metals which owned the Mount Milligan Copper-Gold Project in British Columbia, Canada. From 2006 through to 2010, Mr. King was involved in financing, corporate development, and investor relations for Terrane Metals as well as providing assistance with the acquisition of Terrane Metals in 2010 by Thompson Creek for $800 million. During his career, Ryan has assisted in raising $250 million for previous companies. Ryan holds a Bachelor of Commerce from Royal Roads University in British Columbia, Canada. Mr King currently sits on the Board of Pinecrest Resources Ltd. and Edgewater Exploration Ltd.
Mark has more than 30 years of experience in the mining sector, including the past 10 years as Vice President of Exploration for New Gold Inc. His background includes key contributions and leadership to new deposit discoveries, fast track resource development through feasibility and commercial start-up, reserves growth at operating mine sites, evaluations and corporate development. Prior to joining New Gold, he spent thirteen years at Metallica Resources in progressive management roles before joining the executive team as Vice Presdient of Exploration. Mark is a member of Professional Geoscientists Ontario (PGeo) and Registered Member of the Society for Mining, Metallurgy and Exploration.
Vice President, Technical Services
Mr. Patterson was appointed Vice President, Technical Services of Calibre in September, 2019. Mr. Patterson is a Civil Engineer with global mining exposure in all phases of the mine life cycle including strategic planning, advanced exploration, early stage studies, project engineering, environmental management, permitting, construction, start-up, operations, and closure. Mr. Patterson has a strong cross-functional technical background with specific expertise in managing geographically-dispersed, cross-functional teams. Prior to joining Calibre, he was an executive at Goldcorp Inc. for 5 years and had previously worked with Newmont Mining for 12 years. He has worked in many countries around the globe including the U.S., Canada, Indonesia, Australia, New Zealand, Peru, Suriname, Bolivia, Mexico, Ghana, Argentina, and Chile. He is a registered Professional Engineer and holds a Master’s Degree in Civil Engineering and a Masters of Business Administration.
Vice President, Human Capital
Jason Gregg has more than 20 years of experience as a human resources professional and joined the Calibre Mining team on November 1, 2019. Mr. Gregg was most recently Executive Vice President, Human Resources for Alio Gold. He holds a BBA (1995) and a MBA (2000) from Simon Fraser University. Before Alio Gold, he was the Vice President of HR, Safety and Environment for Newmarket Gold. Before joining Newmarket, he provided HR consulting services to various mining organizations as well as other industries including forestry and technology. Prior to developing his consulting practice, he worked as a Human Resources executive in the mining industry with Farallon Mining and Nyrstar. Mr. Gregg has also held senior level human resource roles with HDI, International Forest Products, Canadian Forest Products, and Teck.
Mr. Dagsaan is a Chartered Professional Accountant (CPA, CA) with over ten years of experience in financial reporting, auditing, equity financings, and regulatory compliance. Mr. Dagsaan articled with PricewaterhouseCoopers LLP from 2005 to 2007 where he worked primarily in the firm’s mining practice. Mr. Dagsaan has an undergraduate business degree from Vancouver Island University.
Vice President & Country Manager
Omar Vega has 36 years of working in the Nicaraguan mining industry. He has a degree in mining engineering (Mexico, 1983) and also has a master’s degree in mining engineering with a major in mining company administration (Mexico, 1990). In addition, he is a graduate of the INCAE Senior Management Program (Costa Rica, 2013), among other studies.
In 2009, he led the technological reconversion of the largest mine in Nicaragua, Mina La Libertad. He is a leading professional with extensive capacity and knowledge of Nicaraguan mining, having worked in the three main gold mining districts of Nicaragua.
Senior Manager, Corporate Affairs
Thomas Lee has been working in the mining industry in Nicaragua for over ten years. Originally from California, Thomas has lived in Nicaragua for over thirty years and has a strong understanding of the country’s sociopolitical and cultural characteristics, enabling him to engage successfully with national and external stakeholders. As Senior Manager, Corporate Affairs for Calibre Mining, Thomas oversees the areas of Human Resources, Community Development, Community Relations, and Communications.
Thomas has a Bachelor of Arts degree in Political Science from Stanford University and a Master’s degree from Fitchburg State University. Since 2014, Thomas has also served on the Board of Directors of the Association of Nicaraguan Producers and Exporters (APEN).
Carlos David Castillo M.
Carlos Castillo has over 21 years’ experience as a Lawyer and Public Notary, of which 13 years has been in the mining sector. Initially serving as a Counsel and Managing Partner of a Nicaraguan law firm until joining B2Gold Corp in 2009 responsible for all its subsidiaries in Nicaragua specializing in Corporate Governance, working closely with Law Firms in Vancouver, Minneapolis and New York. He has an Executive Global MBA from the University of Miami (2014), has completed courses in Mining Laws: Domestic and International Issues taught by Rocky Mountain Mineral Law Foundation, Colorado, U.S.A. (2014) and U.S. Legal Methods: Introduction to U.S. Law, at the Institute for U.S. Law of George Washington University, Washington D.C., USA. (2019).
During his work for B2Gold he was responsible in securing require local guarantees in Nicaragua for ISDA Agreement with MacQuarie Bank Limited for up to US$200 Million and other Credit Agreements with HSBC Bank USA, National Association for amounts up to US$800 Million. He also was in charge on behalf of B2Gold for Due Diligence in its intent to acquire a local company for US$95 Million. He represented B2Gold in Nicaragua in the Share Purchase Agreement with Calibre Mining Corp. for US$100 Million.
General Manager, El Limón Mine
He has 35 years of working in the mining industry, inside and outside Nicaragua. He is Nicaraguan, graduated as a Mining Engineer from the National Autonomous University of Mexico. He has higher studies in Investment Project Management (INCAE) and has received several specialization courses in project formulation and evaluation, among other topics.
During his mining career, he has held positions ranging from mine supervision, mining project management, technical services management and general management. In addition to working successfully in the three main mining districts of Nicaragua, he has also worked in the mining industry of Honduras, Mexico, Canada and United States.
General Manager, La Libertad Mine
Carlos Barberena has more than forty years of working in the mining industry. He is Nicaraguan, civil engineer by profession, and has held positions ranging from the management of relations with artisanal miners and communities, as well as the logistics, administration and general management of mines located in the three main mining districts in Nicaragua.
In the early eighties, he served as Director of Supplies for the then National Mining Institute (INMINE). During the technological reconversion process of the largest mine in Nicaragua, led the negotiations with groups of artisanal miners that were located in the sector where Mojon pit would be located, the first to produce under the new technological process in Mina La Libertad.
Jorge Marín Fernández
Corporate Operations Manager - Nicaragua
Jorge Marín Fernández is originally from Chile. He has worked in the mining industry for over 32 years. He has extensive experience in gold and copper mining companies in Chile, Costa Rica and Nicaragua. He started working in 2009 for B2Gold, occupying different positions.
In May 2016, he was appointed General Manager of La Libertad Mine, and in September 2018, he was promoted to his current position, supervising Mina La Libertad Mine and El Limon Mine in Nicaragua. His previous experience was in Mantos de la Luna and Rayrock, copper mines, and in the San Cristóbal - Niugui gold mine, all in Chile. During his professional career, he has developed skills such as strategic vision, leadership, planning and organization, and crisis management. Jorge received the degree of Electrical Engineer and a Master in Asset Management from the Professional Institute of INACAP, Universidad de Antofagasta and Universidad Federico Santa María in Chile, respectively. Jorge is married and has two children.