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Our Team 

gbt.BUILD’s pioneering team is dedicated to solving construction’s toughest challenges—labor scarcity, material waste, and project delays—by elevating patented framing technology with AI, empowering builders to do more with less.

Hal Hinkle, Chief Executive Officer of Global Building Technologies, brings extensive experience and deep commitment to combating climate change. Through his multifaceted career spanning finance, academia, and sustainable entrepreneurship, Hal leads gbt.BUILD's mission to revolutionize construction with innovative, carbon-negative solutions that harness the world's fastest-growing structural fibers. Before joining BamCore, Hal spent 22 successful years at Goldman Sachs, then led a global online bond exchange for five years. In 2004, he shifted his focus to climate change by founding a non-profit foundation focused on environmental education. His academic background showcases his multifaceted expertise. As a National Science Foundation Graduate Research Fellow, he earned his PhD in Neuroscience from Columbia Medical School. He also holds an MBA (Beta Gamma Sigma) from Columbia Business School and a BS in Biochemistry (Cum Laude) from UC Irvine. Following his academic pursuits, Hal returned to California to develop an organic, climate-conscious vineyard and winery in Sonoma County. This venture introduced him to BamCore's innovative building solutions, sparking his interest in bamboo's potential for carbon sequestration in construction. As a certified University of California Climate Steward, Hal continues advancing sustainable practices. His combination of business expertise, scientific knowledge, and environmental commitment positions BamCore as a leader in carbon-negative construction technology. His vision for BamCore embodies his dedication to merging cutting-edge technology with environmental stewardship, creating a more sustainable future for the construction industry.

Hal Hinkle

CEO

As Chief Commercial Officer and Co-Founder of gbt.BUILD, Zack is a visionary leader in sustainable construction, driving innovation to address critical industry challenges. His focus is on pioneering next-generation custom prefabricated construction solutions, harnessing the potential of rapidly renewable Eucalyptus and timber bamboo to revolutionize framing systems. With nearly two decades of experience in business development and strategic growth, he has been instrumental in developing framing solutions that significantly accelerate construction cycles, reduce labor requirements, increase efficiencies, and minimize waste. BamCore's patented framing systems and LOBIC technology are transforming approaches to low-rise and mid-rise construction. Under his leadership, BamCore has achieved remarkable growth, doubling revenue in 2023 and again in 2024, with projections for tenfold expansion between 2025 and 2026. The company's innovative framing systems have demonstrated the ability to halve construction time with smaller crews while minimizing waste and maximizing energy efficiency in buildings. He has successfully forged strategic alliances with premier commercial builders across the United States, leveraging his expertise in sales strategy, market expansion, and sustainable innovation. As CCO and Co-Founder, he is dedicated to decarbonizing the construction industry while addressing its most pressing challenges. BamCore's planet-positive engineered framing systems not only meet but exceed customer expectations for speed, efficiency, and durability. His contributions to the industry have been widely recognized, including being named one of Autodesk's Top 40 Under 40 Champions of Construction in 2023. He holds a BS in Business and Marketing and a BS in Business Strategy from Sonoma State University, providing a strong foundation for his role in driving BamCore's mission to revolutionize sustainable construction practices.

Zack Zimmerman

Chief Commercial Officer

Nicholas Allan

Chief Product Officer

As Chief Marketing Officer of BamCore, Tobe Sheldon leads the company's presence in pioneering carbon-negative building solutions. With over three decades of experience in environmental stewardship, resilience strategies, and business innovation, she drives marketing efforts to enhance brand engagement, And thought-leadership conversations that promote sustainable construction practices. Her focus is on executing strategies that align with BamCore's mission to decarbonize the built environment through rapidly regenerative materials. After earning a Bachelor of Science in Geology and completing an internship at the U.S. Geological Survey, Tobe pursued viticultural training in New Zealand and France. She gained valuable knowledge in sustainable winemaking and regenerative agriculture, which led to founding Sheldon Winery in 2003. She operated the winery until 2022, when she joined BamCore to contribute to climate initiatives through building decarbonization. At BamCore, Tobe merges her environmental stewardship passion with marketing innovation expertise. She spearheads data-driven campaigns, brand development, and cross-functional collaboration to strengthen BamCore's position in the green building industry. Her work at BamCore advances circular economy initiatives that balance ecological health, social equity, and economic sustainability while addressing climate change challenges.

Tobe Sheldon

CMO

David is the Chief Legal Officer for gbt.BUILD. In his role, David oversees all legal, regulatory, and compliance matters for the Company. He has had a life-long interest in construction, building projects, and real estate and is enthusiastic about BamCore’s mission of developing innovative, superior construction solutions to decarbonize the built environment. David began his career as an attorney with a large New York City law firm working on corporate, securities, and M&A matters. He subsequently served in General Counsel and Chief Operating Officer roles for both Sotheby’s International Realty, a leading international real estate company, and ICAP, the world’s largest provider of brokerage services to the global banks. David brings significant experience in growth strategies, M&A, joint ventures, Intellectual Property, and international operations. David earned a J.D. from Harvard Law School and a B.A. in Mathematics from Rutgers University.

David Mazzucco

Chief Legal Officer

Jack Forese

Director, Fabrication

Lucas Oshun brings 10 years of experience in timber and bamboo supply chain development, preceded by 8 years directing restoration forestry, environmental education, and community agriculture projects across Central and South America and the USA. His environmental ethos combines with practical insights on supply chain efficiency and market competitiveness. As a practicing agroforester specializing in fast-growing dense fibers, Lucas splits his time between Ecuador and his native Northern California, regularly visiting BamCore supply locations in Brazil, Florida, Ecuador, and other source countries.

Lucas Oshun

Director,
Supply Operations

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