Leslie Dewan
An MIT-trained nuclear engineer who co-founded a startup aiming to reinvent atomic energy with a radically safer and waste-consuming molten salt reactor.
Born 1984 (age 42)·American nuclear engineer·Birthday: November 27·Millennials
Biography
Leslie Dewan represents a new wave of nuclear optimism, armed with a PhD from MIT and a mission to solve the climate crisis. While many saw nuclear power's problems as intractable, she saw a design challenge. With fellow graduate Mark Massie, she co-founded Transatomic Power, betting on a modernized version of the molten salt reactor. Their pitch was compelling: a system that could run on nuclear waste, dramatically reduce proliferation risks, and theoretically never melt down. Dewan became the articulate public face of this nuclear revival, earning spots on prestigious lists and delivering TED-style talks that framed atomic energy as a clean, necessary tool. Though Transatomic ultimately closed after technical hurdles and funding challenges, Dewan's work shifted the conversation, proving that smart, young engineers were willing to tackle one of society's most daunting technological problems. She continues to advocate for advanced nuclear as a crucial climate solution.
Millennials
1981–1996
The first digital natives. Grew up with the internet, came of age during 9/11 and the 2008 crash. Highly educated, deeply indebted, slower to marry and buy houses. Redefined work, identity, and what it means to be an adult.
Leslie was born in 1984, placing them squarely in the Millennials. The events that shaped this generation — the internet revolution, 9/11, and the 2008 financial crisis — shaped the world they entered and the choices available to them.
#1 When Leslie Was Born
The biggest hits of 1984
#1 Movie
Beverly Hills Cop
Best Picture
Amadeus
#1 TV Show
Dallas
Leslie's Life & Times
The world at every milestone
1984Born
Apple Macintosh introduced
Gas: $1.13/galHome: $59,800Min wage: $3.35/hrPresident: Ronald Reagan"When Doves Cry" — PrinceBest Picture: Amadeus
1989Started school
Berlin Wall falls; Tiananmen Square protests
Gas: $1.00/galHome: $79,100Min wage: $3.35/hrPresident: George H.W. Bush"Look Away" — ChicagoBest Picture: Driving Miss Daisy
1997Became a teenager
Princess Diana dies in Paris car crash; Harry Potter published
Gas: $1.23/galHome: $104,100Min wage: $5.15/hrPresident: Bill Clinton"Candle in the Wind 1997" — Elton JohnBest Picture: Titanic
2000Could drive
Y2K passes without incident; contested Bush-Gore election
Gas: $1.51/galHome: $119,600Min wage: $5.15/hrPresident: Bill Clinton"Breathe" — Faith HillBest Picture: Gladiator
2002Could vote
Euro currency enters circulation
Gas: $1.36/galHome: $137,800Min wage: $5.15/hrPresident: George W. Bush"How You Remind Me" — NickelbackBest Picture: Chicago
2005Turned 21
Hurricane Katrina devastates New Orleans; YouTube launches
Gas: $2.30/galHome: $167,500Min wage: $5.15/hrPresident: George W. Bush"We Belong Together" — Mariah CareyBest Picture: Crash
2014Turned 30
Russia annexes Crimea; Ebola outbreak in West Africa
Gas: $3.37/galHome: $160,700Min wage: $7.25/hrPresident: Barack Obama"Happy" — Pharrell WilliamsBest Picture: Birdman
2024Turned 40
AI reshapes industries; Paris Olympics
Gas: $3.31/galHome: $372,000Min wage: $7.25/hrPresident: Joe Biden"Espresso" — Sabrina CarpenterBest Picture: Anora
2026Age 42 today
Gas: $3.91/galPresident: Donald Trump
Key Achievements
- Co-founded Transatomic Power, a nuclear reactor design company that raised millions in venture capital.
- Was named to the MIT Board of Trustees, contributing to the governance of her alma mater.
- Selected as a World Economic Forum Young Global Leader for her work in energy innovation.
- Earned a PhD in Nuclear Engineering from MIT, where her thesis work informed her startup's reactor design.
Did You Know?
She is a classically trained pianist and once considered a career in music.
She appeared on the cover of Forbes magazine's '30 Under 30' issue in 2015.
Her undergraduate degree from MIT is in Mechanical Engineering.
She has given a popular TEDx talk on the future of nuclear energy.
““We need a massive amount of carbon-free power, and nuclear is the only source that can provide that much, that quickly.””
