Carollo expands stormwater branch with two new leaders

Carollo recently expanded its stormwater services, starting with the addition of two new leaders.
Aug. 25, 2025

Millie Cowley-Crawford, vice president and California and Hawaii stormwater leader for Carollo and Stephen Costello, vice president and Texas stormwater leader for Carollo, discuss their new roles, which expand Carollo's stormwater service offerings. The two discuss how their roles increase focus on stormwater at Carollo and how the expansion plays into the adopting of the One Water philosophy.

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About the Author

Katie Johns

Katie Johns, editor-in-chief of Stormwater Solutions, graduated from the University of Missouri in 2016 with a Bachelor of Journalism and a Bachelor of Arts in Spanish. Johns joined the Stormwater Solutions team in September 2019. Johns also helps plan the annual StormCon conference and co-hosts the Talking Under Water podcast. Prior to entering the B2B industry, she worked as a newspaper reporter and editor in Sarasota, Florida, and a magazine assistant editor in the Chicago suburbs. She can be reached at [email protected].

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