William Tarpeh (RBS 2008) Named 2025 MacArthur Fellow

When extraordinary talent meets purpose, the results can transform lives and redefine what’s possible. This fall, William Tarpeh (Ron Brown Scholar, Class of 2008) was named a 2025 MacArthur Fellow — one of the nation’s highest honors recognizing creativity, leadership, and groundbreaking innovation.

The MacArthur Fellowship, often called the “Genius Grant,” is awarded to individuals who demonstrate exceptional originality and dedication in their creative pursuits. William joins a prestigious group of visionaries shaping the future through bold ideas and tireless commitment to the public good.

As an Assistant Professor of Chemical Engineering at Stanford University, William’s work focuses on turning waste into valuable resources — developing sustainable technologies that recover clean water, fertilizers, and energy from discarded materials. His research bridges environmental engineering, chemistry, and social impact, creating practical solutions that advance both science and equity.

William’s journey reflects the very mission of the Ron Brown Scholar Program: to support brilliant minds who lead with purpose and service. From his undergraduate days at Stanford to his Ph.D. at the University of California, Berkeley, and now as a leading researcher and mentor, William has embodied the spirit of excellence and community uplift that defines our Scholar network.

This honor is more than recognition of individual achievement — it’s a reminder of what happens when opportunity meets dedication.

We are so proud of William and the impact his work continues to have on the world.

Learn more about William’s research and the 2025 MacArthur Fellows at macfound.org.

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In Memoriam:
Cal LaRoche (1946–2025)

It is with profound sadness that we share the passing of Cal LaRoche, a brilliant and dedicated advisor and champion of the Ron Brown Scholar Program, who left us on Wednesday, April 9th, 2025.

Born in New York in January 1946, Cal graduated from Central State University in Ohio, where he joined the Eta Gamma Chapter of Omega Psi Phi Fraternity. His career spanned decades of leadership and innovation, beginning at the National Security Agency and continuing through key roles at IBM, SkyTel Communications, and The Orkand Corporation. 

A visionary entrepreneur, Cal later co-founded DC Ventures and Associates.

His commitment to service was unwavering. Cal chaired the Boards of Trustees at Suburban Hospital in Bethesda and Norwood School and served with distinction for 15 years on the Advisory Board of the Ron Brown Scholar Program. His leadership extended to the Beta Mu, Boulé Foundation Board, where he served as Chair, and to Patients For Affordable Drugs, where he was a founding board member and Treasurer.

An avid golfer and advocate for equity in the sport, Cal co-founded the Pro-Duffer/Carter Foundation Scholarship to promote diversity in golf. A long-time member of TPC Potomac at Avenel Farm, he was as passionate about creating opportunity as he was about the game itself.

Cal’s legacy is carried on by his beloved family: his mother, Lucille “Gloria” David; his wife, Esperanza, and their sons, CJ and Ethan; his former wife, Cheryl LaRoche; their daughters, Gina LaRoche, Renee LaRoche-Morris, and Danielle LaRoche; six grandchildren; and his siblings. His wisdom, warmth, and unwavering belief in the potential of young people will remain an enduring part of the Ron Brown Scholar community.

We are forever grateful for Cal’s enduring support, leadership, and love. He leaves behind a legacy of excellence, generosity, and deep humanity. He will be deeply missed.