David Tretbar has wide-ranging experience in surface and underground exploration, resource modelling, mine development and production, laboratory operations, mineral analysis, process metallurgy, and project management. He is the vice president of exploration and mineral resources at Denver-based Summit Mining International, a 100%-owned subsidiary of Sumitomo Corporation of Japan, and is responsible for developing exploration programs, implementing exploration and resource development strategies, and providing technical support in all aspects of mine and mill production at Minera San Cristóbal in Bolivia. He also performs project due diligence for strategic alliances and joint ventures, and executive support functions within Summit Mining and Sumitomo Corporation. He holds a Bachelor of Science in Geology from Northern Arizona University, and a Master of Science in Geochemistry from the University of Nevada Reno. Mr Tretbar is a Certified Professional Geologist with the American Institute of Professional Geologists, and a Registered Professional Geologist in the state of Arizona.
