The hustle and bustle of New York City set the scene for ENR’s conversation with this year’s National Top 20 Under 40 winners.

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Helping improve water quality and sanitation service in Bolivia early in his career sparked Will Kirby’s passion to build community and sustainability-related projects.

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Director of sustainable design
for STV is energized to tackle industry’s biggest climate challenges.

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LaBuff steadily advanced through multiple promotions and increased responsibilities to her current role.

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Pursuing water-wastewater work as a career wasn’t the first thing on Christopher Baersten’s mind when he began studying engineering.

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Walton works on projects in the manufacturing, health care, education, advanced technology and aviation markets.

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Young CEO has built a company focused on quality design services, also “making sure people
understand that this field exists and is a viable path to success.”

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Southall leads a 20-person team working for a variety of large clients and project types.

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Colleen Marnell was, as of January 2024, the youngest and third female regional leader in the history of Kimley-Horn.

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Russell takes pride in giving back to the neighborhoods he grew up in and around.

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