Leadership Team

  • Ross Orr | President & CEO

    Ross Orr has been associated with BacTech since bringing the Company from Australia to Canada in 1995, where he played a central role in its IPO in 1997.  In 2010, following the restructuring that split BacTech Mining into two entities, Ross assumed leadership of BacTech Environmental. Under his direction, the Company has become a pioneer in applying bioleaching to treating concentrates and remediating mine waste and recovering valuable metals. Ross continues to guide BacTech’s strategy, growth, and commitment to developing sustainable mining solutions that benefit both industry and communities.

  • David Tingey | Chief Operating Officer

    David Tingey joined BacTech as Chief Operating Officer in early 2022, bringing extensive international mining and sustainability expertise. Over his career, he has held senior roles with Rio Tinto, Walter Energy, Bluestone Resources, New Pacific Metals, Global Alumina, CCC Construction, and Western Coal. David is recognized for building operational capacity, implementing sustainability best practices, and driving positive change at the site level. His experience spans construction, project development, and corporate responsibility across multiple jurisdictions. At BacTech, David applies this background to overseeing day-to-day operations, ensuring projects are executed efficiently while aligning with the Company’s mission of responsible and sustainable mining.

  • Louis R. Nagy | Chief Financial Officer & Corporate Secretary

    Louis R. Nagy has served as BacTech’s Chief Financial Officer for more than a decade, providing strategic financial oversight and governance. A Chartered Accountant with over 28 years of professional and industry experience, Louis has worked extensively in financial reporting, treasury, reorganizations, IT system implementation, and investment banking. He has held senior finance roles, including CFO positions, in both public and private companies. At BacTech, Louis manages financial operations, corporate compliance, and capital structure, ensuring the Company remains positioned for sustainable growth. His broad expertise supports BacTech’s mission to deliver innovative environmental solutions while maintaining financial strength and transparency.

  • Dr. Paul C. Miller | Vice President, Technology & Engineering

    Dr. Paul Miller brings more than 30 years of industrial experience in bioleaching and mining applications. He joined BacTech Australia in 1996 and has since led the technical development of projects, from early test work through to design and execution. Paul oversees all BacTech testing programs conducted at ALS Laboratories in Perth, Australia, ensuring rigorous scientific standards. His career began in the mid-1980s evaluating bioleaching against conventional technologies, with a particular focus on refractory gold projects worldwide. Today, Paul continues to guide BacTech’s technology strategy, advancing innovative approaches to remediation and supporting the Company’s role as a leader in sustainable mining. Dr. Miller is the inventor of the Company’s patent filing for 0 Tailings bioleaching.

  • Kate Castro | Vice President, Environmental

    Kate Castro joined BacTech in 2022 as Vice President of Environmental, bringing over 16 years of experience in environmental and sustainability management in the mining and oil sectors. She has led projects from development through to operation, ensuring compliance with international standards and best practices. Kate holds a Master’s degree in Safety, Health, and Environment from Universidad de Huelva in Spain, and a degree in Chemical Engineering. In Ecuador, she has built strong relationships with government authorities and industry groups, successfully managing permitting processes and contributing to BacTech’s Sustainable Bond Framework certification. Her expertise is central to advancing the Company’s environmental and social commitments.

  • Steve Roebuck- Geological Consultant

    Steve Roebuck has over 25 years of experience in the mining and exploration industry including open-pit and underground mine operations. Steve has held senior management positions with junior exploration companies and small junior production companies. In addition, he has capital market expertise including M&A strategies, junior financing (over $10 M), investor relations and marketing and is currently the President and CEO of Avidian Gold Corp.

  • Dr. Nadia Mykytczuk - President and CEO of Mirarco, strategic partner to BacTech

    A seasoned research scientist focused on mine waste microbiology and the development of applications for bioleaching and bioremediation, Dr. Mykytczuk will work closely with the BacTech scientific team to help support pilot plant testing efforts in addition to exploring other novel uses of the Company’s technology. Dr. Nadia Mykytczuk is currently the interim CEO and President of MIRARCO in Sudbury, Canada, a leader in the development and deployment of innovative solutions responding to the needs of the mining industry. Regarded as one of Canada’s top experts in biomining and bioremediation, she has worked for 15 years in the field of mine waste microbiology and the development of applications for bioleaching and bioremediation. From 2016 to 2021, she held the role of Industrial Research Chair in Biomining, Bioremediation, and Science Communication at Laurentian University. Dr. Mykytczuk is a graduate of Laurentian University with a Doctor of Philosophy (PhD) in Adaptation to Environmental Stressors in Acidithiobacillus ferrooxidans, and Carleton University with Bachelor of Science (BS) in Environmental Science.

Board / Advisors

  • Ross Orr | President & CEO

    Ross Orr has been associated with BacTech since bringing the Company from Australia to Canada in 1995, where he played a central role in its IPO in 1997.  In 2010, following the restructuring that split BacTech Mining into two entities, Ross assumed leadership of BacTech Environmental. Under his direction, the Company has become a pioneer in applying bioleaching to treating concentrates and remediating mine waste and recovering valuable metals. Ross continues to guide BacTech’s strategy, growth, and commitment to developing sustainable mining solutions that benefit both industry and communities.

  • W. Walter Cimowsky | Director, Member of the Audit Committee

    Walter Cimowsky is a founding partner of Ocean Partners Holdings Limited, a global physical trading and marketing company for copper, zinc, lead, and precious metal concentrates. Ocean Partners also provides or arranges financing for small to mid-sized mining projects and holds equity positions in more than 20 mining operations worldwide. Walter brings deep knowledge of commodity markets, financing structures, and international trade. As a member of BacTech’s Audit Committee and Board of Directors, he offers practical insight into project financing and governance, supporting the Company’s commitment to transparency, sustainability, and responsible growth in the mining sector.

  • Carolina Orozco | Director


    Carolina Orozco is the former President of the Board of Directors of the Mining Chamber of Ecuador, where she previously also served as a Director. and currently serves as Country Manager for Torata Mining Resources, where she leads the nationally recognized El Guayabo project. She is the first environmental engineer to lead a responsible mining project in Ecuador and is a co-founder and Director of Women in Mining (WIM) Ecuador. Carolina’s career emphasizes sustainability, gender equity, and environmental responsibility. With academic training in environmental engineering, law, and multiple advanced degrees including an MBA from the University of Barcelona, she brings a multidisciplinary perspective to BacTech’s Board and strategic direction.

  • The Hon.Tim Lewin | Director, Chairman of the Board

    Tim is a former Commodities Trader from London, England with more than thirty-five years of industry and management experience. Tim’s trading knowledge began on the floor of the Commodity Exchanges in London before broadening over time to encompass most physical commodities, including gold and LME-traded metals. In 1992 his proprietary company was one of the first to be engaged by the UK Government and sent to the post-Soviet Union to lend support on commodity trading to the “economy in transition”. In the past, Tim served on the Bank of England market monitoring committee and has been a member of the Chartered Institute for Securities and Investments since its creation in the late 1980s.

  • Jay Richardson | Director, Head of Audit Committee

    Jay Richardson is a retired Partner of KPMG (UK) and Clarkson Gordon Arthur Young (Canada and Singapore)(now Ernst & Young). Since his retirement from KPMG in 1993 his principal occupation has been as Managing Partner of James A. Richardson & Partner, a boutique firm of company doctors undertaking engagements focused on business problems, often involving Interim Management, frequently as Interim CEO including of listed public companies. As well, he has served as Board Chair or member and/or Audit Committee Chair or member of over a dozen listed public companies most significantly including Chairman of the Argus Corporation and Interim CEO of Liberty Mines. He has served on the Board of over a dozen charitable organizations, presently including the Textile Museum of Canada, RiverBrink Art Museum, Life Saving Therapies Network and Craft Ontario and chairs the Weir Foundation.

  • Jay L. Naster | Director, Member of the Audit Committee

    Jay is a partner with Brauti Thorning LLP in the criminal and regulatory law group focused on white-collar criminal and regulatory litigation and investigations. Prior to this, Jay served as senior litigation counsel at the Ontario Securities Commission, conducting criminal prosecutions and regulatory hearings pursuant to the Securities Act. Earlier, he served as Crown counsel with the Crown Law Office. Jay is a member of a number of the Advocates Society and the Canadian Bar Association.