In 1979, August-deWilde became treasurer of PMI Mortgage Insurance Company, later serving as senior vice president and Chief Financial Officer (CFO) from 1982 to 1985.

[10][11][8] August-deWilde currently serves on the boards of Sunrun, Eventbrite, Newfront,[12] Tipping Point Community and the San Francisco Housing Accelerator Fund.

She was a member of the policy advisory board of the Center for Real Estate and Urban Economics, University of California, Berkeley.

In 2008, she and her husband seeded a professorship at the Stanford Graduate School of Business in honor of Professor George Parker.

[15] In 2012, they founded the Katherine and David deWilde Faculty/Scholar fund at the Stanford Graduate School of Business to support work on entrepreneurship in developing economies.