Our Experts

100+

Years.

Few teams can match a century of combined mineral exploration expertise spanning multiple continents. Add exceptional service, unwavering support, and a passion for the work they do and where they do it – this is REP.

Joshua Sperry

Chief executive officer

Joshua Sperry, CEO, brings over 15 years of expertise in oilfield development, optimizing operations, and driving strategic growth. With a proven track record of scaling production and leading private equity-backed ventures, he has earned a reputation as a respected industry leader.

Joshua holds degrees in Petroleum Engineering (2012) and Agricultural & Applied Economics (2004) from Texas Tech University, combining technical expertise with economic insight. Based in Midland, TX, he enjoys life with his wife and three children, balancing his professional success with a deep commitment to family and community.

Danielle Gallo

Chief Operating Officer

Danielle Gallo has 25 years of experience in rural economic development, serving as a founder and board member of numerous nonprofit organizations. A 23-year resident of Marathon, TX, she has played a key role in both public and private initiatives, leveraging her expertise in hydrogeology to support sustainable resource use.

As a funding specialist for municipal infrastructure projects, Danielle has helped develop strategic, community-driven industry while championing economic diversity in underserved regions. Danielle is deeply committed to the history, culture, growth and preservation of the Trans-Pecos region and spends her free time rock hunting and practicing lapidary.

Sam Pierce

Chief Geologist

With two decades of experience in mineral exploration across the United States, Africa, and Latin America, Sam Pierce is a distinguished figure in the field. He is credited with discovering the advanced argillic Olympus Project in Peru and the Golden Mile gold porphyry in Nevada. For over 15 years, Sam has managed projects from greenfield to advanced stages, working with a diverse range of deposits including rare earth elements, volcanogenic massive sulfides, narrow quartz-gold veins, Iron Oxide-Copper-Gold, and copper-gold porphyries.

Tom Selman

Member, Supervising Geologist

Tom Selman is the President and CEO of Selman and Associates, LTD, a company that has been a leader in the geological field for 41 years. Under his leadership, the firm has successfully completed thousands of projects both in the United States and internationally. Tom is renowned for developing advanced gas analysis equipment and cutting-edge software that have transformed mineral exploration and geo logging. He supplies REP with the skilled geologists, geo-technicians, and mapping specialists essential for their operations.