Directors and Management

Board of Directors

Mark Child
Chairman & CEO

Mr. Child was commissioned as an officer in the 2nd King Edward VII’s Own Gurkha Rifles and served in the British Army for 4 years. He joined Condor’s Board in May 2006 and became CEO in July 2011. He acquired the concessions that comprise La India Project and has raised the finance and developed the Project into what it is today.

Mr Child has 20 years of equity capital markets experience, as an institutional stockbroker and in corporate finance/private equity, mainly in emerging markets. At board level Mr. Child has been an executive director of Hong Kong listed Regent Pacific Group, an emerging market fund manager and private equity group, which spun off Charlemagne Capital Limited. He has board level experience of AIM listed and private companies. 

Jim Mellon
Non Executive Director

Jim Mellon, based in the Isle of Man, is a renowned fund manager. He began his career with GT Management in the US and in Hong Kong and later became the co-founder and managing director of Thornton Management (Asia) Limited based in Hong Kong. He is co-founder of Regent Pacific Group and Charlemagne CapitalLimited. He is currently chairman of Manx Financial Group Plc and co-chairman of Regent Pacific Group Ltd and Emerging Metals Limited, a director of Charlemagne Capital Limited, Burnbrae Group Limited and various other investment companies. Mr Mellon holds a Master's Degree in Philosophy, Politics and Economics from Oxford University.

Andrew Cheatle
Non Executive Director

Mr. Cheatle is a mining industry executive, professional geoscientist and graduate of the Royal School of Mines at Imperial College, London. His 30-plus-year, international career has encompassed both the senior and junior mining sectors as an exploration geologist, mine geologist, General Manager, Vice-President, Director, President and Chief Executive Officer. Mr. Cheatle was previously Executive Director of Prospectors and Developers Association of Canada (PDAC) from February 2015 to November 2017. As President and CEO of Unigold Inc. the company delivered a maiden 2 million ounce of gold mineral resource at the flagship property in the Dominican Republic.  Between 2000 and 2008 he worked as Chief Geologist at Goldcorp/Placer Dome Inc’s Musselwhite Mine, Ontario, Canada, leading an exploration team that added over 4 million ounces of gold to the mineral resource. Mr. Cheatle is currently a Director of Troilus Gold Corp., and Chief Operating Officer & Director at Tanzanian Gold Corporation.Mr. Cheatle volunteers with not-for-profit organizations. He sits on the advisory councils of the Development Partner Institute and the Canada-International Finance Corporation Africa Local Economic Development Partnership and is a director of International Women in Mining. Most notably, he held the position of President of the Association of Professional Geoscientists of Ontario. 

Kate Harcourt
Non-Executive Director

– Ms. Harcourt is an Environmental and Social Advisor and Chartered Environmentalist with over 30 years’ experience of the environmental and social aspects of both open pit and underground mining projects around the globe. She works as part of the Owner’s Team for a number of companies and also on behalf of financial institutions, carrying out due diligence and compliance performance monitoring during construction and operations. Ms. Harcourt has also worked as a Director of Health, Safety, Environment, Communities and Security for MagIndustries, a natural resource company with assets in Republic of Congo. She worked for a consortium of financial institutions, including IADB and IFC on a geothermal project in Nicaragua between  2010 and 2014. Ms. Harcourt has a Master of Science degree in Environmental Technology from Imperial College. She also sits on the Boards of Roxgold Inc. (TSX) and Orezone Gold Corporation (TSXV) and on the Board level ESG Committee for Hummingbird Resources Plc.

Ian Stalker
Non-Executive Director

Mr. Stalker is a senior international mining executive with over 48 years of experience in all aspects of resource development. He has directed over twelve major gold, base metal, uranium and industrial minerals projects at various phases, from initial exploration drilling to start-up. Mr Stalker was Chief Executive Officer of Brazilian Gold Corporation, a TSX-V-listed company from 2011 until its sale to Brazil Resources in 2013. From 2009 to 2011 he was CEO and later a Non-Executive Director of Berkeley Resources Ltd, an ASX and AIM-quoted company with its main asset being a uranium development project in Spain and from 2008-10, Chairman and CEO at Niger Uranim Ltd. He was CEO of UraMin Inc. from 2005 until its acquisition by Areva S.A. in 2007 for US$2.5 billion. Prior to joining UraMin, between 2001 and 2004, Mr Stalker was Vice President at Gold Fields Ltd, the fourth largest gold producer in the world at the time. Since 2014 Mr Stalker has been CEO (2014 -2017) and subsequently a Director (currently Non-Executive) of TSX-V-listed K92 Mining Inc, a gold and copper producer operating in Papua New Guinea. Mr Stalker was also CEO of LSC (Lithium) a TSX-V-listed Company from 2017 to March 2019 when it was sold to Pluspetrol (Argentina), as well as Exec Chairman Interim CEO and subsequently Director of Plateau Energy Metals (Tsx-V listed) 2014-2019, now under offer from Tsx-V listed American Lithium. Mr Stalker is currently Chairman Of Helium One Aim Listed and CEO of Pasofino Gold a Tsx-V listed company

Senior Management

John Seaberg
Chief Financial Officer

John Seaberg has held several executive roles within the mining industry throughout his career. From July 2019 to June 2021, he was the Senior Vice President and CFO of Calibre Mining. Prior to Calibre, he was the Executive Chairman of Paramount Gold Nevada Corp. He was previously Senior Vice President of Strategic Relations at Klondex Mines Ltd. In this role he was responsible for global investor relations and corporate development initiatives as an acting member of the senior executive team. Prior to Klondex, John was employed for more than 12 years by Newmont Mining Corporation where he last held the position of Vice President, Investor Relations. He has a Bachelor of Science Business Administration (BSBA) degree from Colorado State University and a Masters of Business Administration (MBA) from the University of Denver.

Dave Crawford
Chief Technical Officer

Dave Crawford is a Mining Engineer / MBA with over 40 years background in project studies, mine design, economic analysis and resource estimation spanning 43 years in multiple commodities and multiple countries.   He is a Registered Professional Engineer  and a Qualified Person under CNI 43-101.  Mr. Crawford has worked with Newmont Mining as a Study Director for Mergers and Acquisitions and Value Assurance in gold and copper projects,  in-situ uranium projects in Kazakhstan, and Principal Mining Engineer with Pincock, Allen and Holt. 

Aiser Sarria Sirias
General Manager Mina La India

Aiser Sarria is a Civil Engineer and Nicaragua national with 16 years experience specialising in mining projects. He has worked in both open pit and underground mining operations and on large scale civil projects. He has worked in Nicaragua and El Salvador and attended training courses in Mexico, Guatemala, El Salvador, Nicaragua, Costa Rica, Colombia, Venezuela, Perú and Brazil.  


Before joining Condor, Aiser was the Projects and Mines Superintendent at the El Limon Gold Mine, one of the largest operating gold mines in Nicaragua, currently owned by B2Gold Inc. During his 6 years at B2Gold, Aiser was the manager of seven open pit operations, the construction of two stages of Tailings Storage Facilities and was Pavon´s Mining Project Manager.


From 2002 to 2011 he worked with AGRENIC, CEMEX Nicaragua and CEMEX El Salvador where he was responsible for many civil work projects, including eleven industrial plants producing constructions materials and the extraction operations for five quarries.

Dr Luc English
Senior Resident Geologist

Dr Luc English is an experienced exploration geologist and manager with over 25 years global experience. Dr English has contributed to the definition of significant new mineral resources and the development of a number of open pit gold mines in Australia. During the last 14 years he has worked on a number of projects in Nicaragua in a range of geological settings; planning and supervising the first drilling on what is now Mako Mining’s San Albino Project, exploration drilling on Oro Verde’s Topacio Project,  Minera Los Lirios’ (Electrum Group’s) porphyry system El Guaylo Project, and most notably as Condor Gold’s Country Manager from 2007 to 2015  where his principal role was to oversee 45,000m of drilling at La India Project, which led to the discovery and definition of over 2.32Moz gold mineral resource. Dr English help supervise the local technical team and was involved in several studies that comprise a pre-feasibility study for the La India open pit reserve of 6.9Mt at 3.0g/t gold for 675koz gold on the La India Project in Nicaragua.  Dr English re-joined Condor in October 2020 beings with him extensive knowledge of geology at La India Project.


Dr Luc English is a fellow of the Geological Society of London with Chartered Geologist (CGeol) and European Geologist (EurGeo) accreditation he is a recognised Qualified Person by the Canadian Institute of Mining for reporting to NI43-101 standard. His Phd is from Cambridge University.

Mario Rivas
Administration and Logistics Manager

Mario E. Rivas Castillo is the Administrative Manager for Condor in Nicaragua. Mario is Nicaraguan and has been working for over ten years as an specialist in development and health in Nicaragua. He has been recipient of Chevening UK and TropED Scholarships.

John Williams Chávez Venero
Geological Engineer

John Williams Chávez Venero is a Geological Engineer, he graduated from the National University San Antonio Abad del Cusco-Peru. John has 12 year experience as an exploration geologist in Skarn-type contact metasomatics, Cu-Au-Mo porphyries. High and low sulphuration on epithermal vein systems, geological and hydrothermal alterations mapping, interpretation of geological sections and / or profiles, structural geological mapping and core logging. His specialization is in supervision and logging of geotechnical drill programmes, both drilling and test pits. John has worked extensively in Peru: Mina Tintaya (Xtrata copper), Mina las Bambas (MMG), Mina Antapaccay (Glencore), Toquepala Mine (Southern Peru), Cerro Mina Verde (Freeport-McMoRan), Baños del Inca project (Minera Andina  de Exploraciones), Quellaveco project (Anglo American), project Immaculate (Hochschild).Chile: Doña Inés de Collahuasi Mine Nicaragua: San Albino Mine, La India Mine.

Silvia Irene Perez
Health & Safety / Human Resources Officer

Silvia joined Condor in 2011 as Health and Safety Officer and is responsible for the social studies in the Environmental Social Impact Assessment in the forthcoming Pre-Feasibility Study. Silvia studied Industrial Engineering and graduated at Cristian University of Nicaragua in 2004, with postgraduate studies in Occupational Health and Safety and Mining Safety Management from the Research Centre for Health, Labor, and Environment, and the Peruvian Chamber of Mines (CAMIPER). She got a Master degree in 2016 on Master in integrated management system HSEQ from Camilo Jose Cela University – Spain and Internal Auditor certificate on ISO 9001, 14001 and OSHAS 18001 by Bureau Veritas. Currently, she is Health &Safety and Human Resources Officer.

From 2006 – 2008 she worked for a Multinational company HANSAE Fashion Worldwide as production supervisor and maintenance engineer. In 2009 she worked for the Nicaraguan Ministry of Labor as Divisional Inspector in Occupational Health and Safety. In early 2011, she joined B2Gold in Nicaragua, a Canadian company producing circa 200,000 oz gold per annum, as Industrial Relations and Public Affair Officer.

Jair Diaz Navarro
Senior Mining Engineer

Jair Diaz Navarro graduated from Colorado School of Mines with a B.Sc. in Mining Engineering in 2011 and is currently pursuing a M.Sc. in Finance. After graduation, he joined Barrick at their Cortez mine. He performed various tasks as related to accomplishing production targets including short range planning, drill and blast planning and ore control.

In 2013, Jair joined Maptek, a leading global provider of mining software. He specialized in the implementation of Maptek mine planning solutions and implementing Maptek products for clients such as Vale (Canada), Newmont (Nevada, Peru & Suriname) and Fresnillo Plc (Mexico).

In 2017, Jair joined Gran Colombia Gold at their Segovia underground operations as their first in-house long-range planner. During his time with Gran Colombia Gold, he was focused on improving mine planning standards, mentoring local engineers and coordinating work with SRK consultants to certify reserves according to 43-101 standards.

In 2019, Jair joined OceanaGold at the Haile Mine, South Carolina. As long-range planner, he was responsible for the annual mine plan; as well as reporting annual reserves, LOM equipment requirements, pit optimizations and various trade-off studies to improve shareholder value.

Jair joined Condor in August 2021 as the senior mining engineer based at Mina La India.  

Levinia Sequeira, MSc
Social Manager

Levinia has a BSc in economics, with a international diploma in Management and Resolution of Socio-environmental Conflicts, a postgraduate course in Marketing and Communication and a Master's in Social Responsibility with a focus on Human Rights; all these amalgam with her 16 years of work experience and a broad trajectory in social management within the mining industry. Levina developed and executed sustainable economic models and social development programs, strategic communication plans with stakeholders and conflict resolution. Furthermore, she has carried out two resettlement projects of 11 and 84 families complying with international standards, implemented successful dialogue tables and formed high-level social network teams, this by following complying with international standards for the mining industry.

Heidi Vallecillo Sirias
Environmental Manager

Heidi joined Condor in mid-2021 as Condor’s Environmental Manager in Nicaragua and has a core expertise in environmental monitoring and regulation. She graduated in Civil Engineering  from the Universidad Catolica de Nicaragua in 2002 and more recently has been completing an on-line Masters qualification in Administration and Management of Natural Resources through the Universidad National Agraria in Managua.

Prior to joining Condor, from 2014 – 2021 she worked for the Environmental Quality Directorate at MARENA, the  Nicaraguan Ministry of the Environment and Natural Resources, where she was involved in development of environmental regulations as well as environmental monitoring and compliance at project level, along with preparation of environmental permits. She has also participated in various interinstitutional commissions aimed at proposing solutions to environmental issues in the country. Prior to joining MARENA, Heidi worked in the construction sector.