Company Leadership

McMillen Jacobs and Associates Logo
McMillen Jacobs Associates operates through two divisions and one affiliated company. Our Water Resources Division, which includes construction, is led by Mara McMillen. Our Underground and Tunnels Division, which includes construction management and claims and construction consulting is led by Dan Adams. McMillen JA Engineering PLLC, our affiliate which operates in New York, is led by Dan Van Roosendaal.


Mara McMillen
Chief Operating Officer
Morton D. McMillen
Executive Vice President
Mike Manwaring
Executive Vice President
Marissa Emmons
Vice President / Director of Marketing
Tim Foley
Vice President, Construction

Board of Directors

Daniel Adams
PE, President
Mark Havekost
PE, Northwest Region Manager
John Kaplin
CCM, California Region Manager
Ken Dombroski
PE, Central Region Manager
Dan Van Roosendaal
PE, East Region Manager
Victor Romero
CPEng, Australia/New Zealand Region Manager