Appian Capital Advisory

Sam Abraham is a Principal in Credit & Royalty at Appian Capital Advisory LLP. He has a decade of experience sourcing, evaluating, and negotiating investment opportunities across the capital structure in Emerging Markets and North America. His areas of focus include credit, private equity, growth equity, real assets and infrastructure, renewable energy and storage, and restructuring and turnarounds, along with mergers and acquisitions and cross-border transactions.

Abdul Osman is an ACA-qualified fund controller at Appian Capital Advisory, working in private equity. He previously spent two years working with real estate funds and has 3.5 years of prior audit experience across a range of sectors.

Serves as the contact for public relations and media enquiries at Appian Capital Advisory.

Antti Grönlund is a private equity investment professional serving as Managing Director, Private Equity at Appian Capital Advisory LLP. His sector focus includes energy, industrials, and technology, media, and telecommunications.

Chris Anderson is Vice President of Tailings at Appian Capital Advisory LLP, a London-based private equity firm focused on mining assets, where he conducts technical due diligence and supports portfolio companies in tailings management and dam safety. He previously served as Director of Tailings at Teck Resources, leading the company's implementation of the Global Industry Standards on Tailings Management and managing the tailings department at Highland Valley Copper, and earlier worked at Golder Associates on projects spanning multiple commodities and regions. He holds an MASc in Civil Engineering and a BASc in Geological Engineering from the University of British Columbia, along with dual Executive MBA degrees from Queen's and Cornell Universities.

David Allison is Vice President of Operations at Appian Capital Advisory LLP. A chartered mining engineer with a PhD in rock mechanics, he holds a New South Wales Certificate of Competency as a Production Manager of a Below Ground Mine and is an NI 43-101 Qualified Person, with over twenty-seven years of experience in the design, evaluation, construction and management of underground and open pit mines. His areas of focus include block cave mining, mine planning, and economic evaluation, spanning owner-operator and contractor operations internationally.

Diogo Oliveira is the Global Environmental & Social Director at Appian Capital Advisory. With 15 years of professional experience, he specializes in ESG and people management, focusing on health and safety, regulatory compliance, and engagement with governmental bodies and community stakeholders. His work includes developing organizational culture initiatives, talent development programs, and strategies to mitigate socio-environmental risks and align operations with international standards.

Gavin Clow is a mining engineer serving as Senior Underground Mining Engineer at Appian Capital Advisory. He works in the mining and metals industry with experience in mine planning, feasibility studies, and tools including Deswik, AutoCAD, EPS, and Microsoft Access. Clow holds a Mineral Engineering degree from the University of Toronto.

Igor Gonzales is Chief Operating Officer at Appian Capital Advisory LLP. He has 18 years of experience in the copper industry, 16 years in gold, and 3 years in polymetallic operations.

Jason Santixis is an Investment Associate at Appian Capital Advisory LLP, a private markets firm focused on real assets, mining, energy, and infrastructure. His work spans the deal lifecycle, including origination, due diligence, financial modelling, execution, and portfolio management, covering transactions in mining, renewable energy, and infrastructure. He works on both development projects and operating assets across developed and emerging markets.

José Montoya is Senior Vice President for Latin America at Appian Capital Advisory LLP. A mining engineer with an MSc in mineral economics, he has 26 years of experience spanning management, operations, and planning for underground and open pit mines, along with executive roles in business development and commercial management. His background also includes work in strategy and finance within the mining industry.

Ken Brisebois is Director of Mine Evaluations and Pipeline at Appian Capital Advisory LLP, where he conducts technical due diligence on investment opportunities and participates in the management and execution of the firm's projects. A professional engineer with 40 years of experience in the mining industry, he has worked on Resource and Reserve estimations for mines including Atlantic Nickel, Los Pelambres, Escondida Norte, San Gregorio, Grasberg Big Gossen, Akyem, Diavik and Gahcho Kué. Prior to joining Appian nine years ago, he led or contributed to more than 200 studies and reviews across North and South America, Africa, Indonesia, Russia and Australia, serving as a Competent/Qualified Person under NI 43-101 and JORC for commodities including gold, silver, diamonds, copper, nickel and zinc.

Lucas Sarto is Vice-President, Integrated Planning at Appian Capital Advisory, where he oversees strategic planning, PMO, and FP&A across the firm's global portfolio. He joined Appian's Brazil operations in 2019 as PMO Manager, establishing the Corporate PMO function at Atlantic Nickel and MVV, and previously served as FP&A Manager; his earlier career included PMO roles on Anglo American's Iron Ore Brazil project and Mubadala's bauxite export project in Guinea. Sarto holds a bachelor's degree in Industrial Engineering and a master's in Quality Engineering from Minas Gerais Catholic University (PUC Minas), and speaks Portuguese, English, and French.

Paulo Castellari is Chief Executive Officer of Critical Minerals at Appian Capital Advisory, with 34 years of experience in the mining sector across five continents. During two decades at Anglo American, he led the team that delivered the Minas-Rio project, with first shipment ahead of schedule, and he also worked on a US$6 billion divestment and debt restructuring at CEMIG and a US$1.4 billion bauxite project in Guinea. At Appian Capital Brazil, he oversaw the restart of a nickel sulphide operation in Alagoas and subsequent exits, and more recently managed the ramp-up of a lithium operation in Argentina.

Percy Condori is Director of Processing and Metallurgy at Appian Capital Advisory LLP. A mineral processing engineer with over 20 years of experience, he has worked with base metal commodities including copper, gold, iron, uranium, bauxite, and titanium, focusing on the simulation and optimization of grinding and flotation circuits. His work spans process reviews, plant troubleshooting, process development, plant design, feasibility studies, project management, and water management for mining companies worldwide.

Ralph Penner is Director of Mining at Appian Capital Advisory, within its HQ and Management Services division. He has more than 35 years of experience in underground and surface mine operations and consulting, spanning exploration, feasibility studies, planning, budgeting, development, equipment selection, financial modelling, investing, and management. Penner has also acted as a Qualified Person for several NI 43-101 Technical Reports.

Richard Clark is Global Head of Specialty Materials and Processes at Appian Capital Advisory, where he focuses on engineered materials and devices for energy applications, including lithium-ion batteries and alternative technologies. He has spoken, moderated, and chaired at more than 50 international conferences, and has experience developing and managing intellectual property assets globally.

Richard Hatcher is Senior Vice President - Exploration at Appian Capital Advisory LLP, with 25 years of experience in gold, base metals, diamond, coal, petroleum and lateritic nickel exploration and project development across Australia, the South Pacific, New Zealand and Central and South America. His prior roles include positions at Baker Hughes Inc, Sperry Sun Drilling (Halliburton), Bolnisi Gold NL, Kings Minerals NL and Chinalco Yunnan Copper Resources Ltd. Hatcher contributed to the discovery and delineation of several deposits, including the Tuvatu gold deposit in Fiji, the Roseby copper oxide deposit in Australia, and the Ocampo, Palmarejo and Cerro del Gallo deposits in Mexico.

Sam Wignall is a Senior Vice President at Appian Capital Advisory LLP, working in traditional and transitional energy investment. He has deployed over $2 billion of capital across more than 20 transactions for Vitol, Macquarie, and Foresight. His experience spans deal origination, transaction execution, and board responsibilities across the entry, growth, and exit stages of platform management.

Trevor Krawchyk is Head of Continuous Improvement at Appian Capital Advisory LLP, with more than 25 years of experience in operational excellence and continuous improvement across the mining, automotive, and industrial sectors. He spent a decade in leadership roles at Toyota Motor Manufacturing Canada, where he worked with the Toyota Production System, automotive model launches, and management operating system improvements, before moving into mining with organizations including Barrick Gold, Goldcorp, and Lundin Mining. His work has covered areas such as Lean methods, asset management, supply chain, mining automation, energy and decarbonization, and operational readiness for new assets.

Victoria Tweedie is a Senior Resource Geologist at Appian Capital Advisory, where she evaluates mining companies and assets across the investment cycle, providing technical due diligence and analysis of geology, mineral resources, mine plans and operational performance across multiple commodities and jurisdictions. Her background spans exploration, mining operations, resource estimation and private equity. She also leads AI adoption within Appian's technical team and supports its implementation across portfolio companies.

Joshua Fontenot is a Vice President at Kinderhook, where he works on investments in the environmental & equipment services and industrials & manufacturing sectors. Before Kinderhook, he spent three years at Houlihan Lokey in the Industrials and Business Services groups, focusing on mergers and acquisitions. He holds a BBA in Finance from Georgetown University.

Liam Rogers is a Managing Director and Head of Capital Formation and Investor Relations at Kinderhook. He previously worked as an Executive Director in the UBS Private Funds Group, raising capital from institutional investors for private equity funds, and earlier as a Vice President in Lazard's Private Capital Advisory Group. He holds a BA in Economics from The College of the Holy Cross.

Taylor Grushen is the Office Manager at Angeles Equity Partners, handling office management along with administrative and accounting support. She joined the firm in 2025, having previously held an Office Manager role at MK Business Centers. She holds a B.S. in Biology from Loyola Marymount University.