Metallurgical Staff

Lance Engelbrecht, Principal Metallurgist

Lance Engelbrecht is a Principal Metallurgist with 25 years of experience, including 18 years in operations (including pyrometallurgical, hydrometallurgical and electrometallurgical facilities), and seven years in consulting with major multinational engineering firms.  Prior to his work as a consultant, Lance Engelbrecht held senior operations positions with Hudbay Minerals Inc. at the company’s zinc plant in Manitoba, Canada, was the Production Manager – Electrowinning, at Skorpion Zinc’s Rosh Pinah mine in Namibia, and served as a Mineral Processing Engineer and Production Manager for Namakwa Sands Limited in South Africa.  Mr. Engelbrecht has significant experience in the commissioning of new facilities, start-up, and process optimization.  His areas of expertise include operations management, process optimization, budgeting and forecasting, study management, and process development and design.  His experience also includes Feasibility and Prefeasibility Studies and test work recommendations and supervision.  

Brenna Scholey, Principal Metallurgist

Brenna J.Y. Scholey, P.Eng., is a Principal Metallurgist with over 30 years of experience in the mining industry.  Her experience includes base metals milling, smelting, and refining, precious metals processing, project evaluations, research and development, flowsheet design and optimization, metals accounting, and production planning.  Ms. Scholey has expertise in metals separation technologies and recycling.

Paul Hampton, Principal Metallurgist

Paul Hampton, P.Eng., Principal Metallurgist, is a metallurgical engineer with 30 years’ experience in engineering, design, operation and management of mineral processing and hydrometallurgical systems and facilities.  His process design experience includes comminution, classification, atmospheric and pressure leaching, thickening and filtration, precipitation, cementation, gas-liquid stripping and absorption, solvent extraction and electrowinning, ion exchange and water treatment. His  experience is related to the processing of base and precious metals and phosphate and potash and includes due diligence, feasibility studies, engineering, construction management, commissioning, and plant start up.  Prior to joining RPA Mr. Hampton spent nine years with SNC-Lavalin as a metallurgical engineer and Manager, Metallurgy  and served as General Manager of Mineral Processing with Washington Group.   He was also the General Manager of Outokumpu Technology, Inc.’s Centennial, Colorado office which was responsible for the sale and delivery of mineral processing technology and equipment, including grinding mills, flotation, thickening and automation equipment to the North American market area, including Mexico, and the sale and delivery of grinding equipment to clients in North and South America.

Kathleen Altman, Associate Principal Metallurgist

Kathleen Altman, P.E., Ph.D., is an Associate Principal Metallurgist based in Denver, Colorado. She has over 30 years of experience in the mining industry including operations, consulting, and academia. She began her career in plant operations and commissioning. Her consulting experience includes the completion of scoping, prefeasibility, and feasibility studies, and NI 43-101 Technical Reports. Dr. Altman has also contributed to research and process development as well as detailed engineering designs for processing plants, water treatment facilities, and infrastructure. Her work has supported the evaluation and/or development of numerous, diverse, national and international mining projects.

Holger Krutzelmann, Associate Principal Metallurgist

Holger Krutzelmann, P.Eng., is an Associate Principal Metallurgist with over 40 years of operating and metallurgical experience in the mining industry, including base metal, potash, and gold operations. He has spent more than 15 years working in major engineering firms on the design and implementation of new projects. His previous operating positions range from operator to surface superintendent, as well as chief metallurgist in base metal plants and gold plants utilizing pressure oxidation. Mr. Krutzelmann has extensive managerial experience on multi-sized projects and studies. His project experience involves work in several countries, including Australia, Canada, Cuba, Greece, Indonesia, Papua New Guinea, New Caledonia, and the USA.