Jessia DuBois-Maahs, Contributing Writer

2013 40 Under 40: Ken Lindsey, 37

Contract Executive, Southland Industries, Garden Grove, Calif.

2013 40 Under 40: Steve Mumm, 28

Mechanical Engineer, KJWW 
Engineering Consultants, Madison, Wis.

2013 40 Under 40: Scott Miller, 35

Associate, Shaffer Baucom Engineering & Consulting, Lakewood, Colo.

2013 40 Under 40: Jamey Lyzun, 36

Associate, Mechanical Engineer, 
Arup, Los Angeles

2013 40 Under 40: Christopher Lynch, 29

Operations Manager, Rolf Jensen & Associates Inc. (RJA), Boston

2013 40 Under 40: Amit Khanna, 36

Senior Design Engineer and 
Senior Sustainability Consultant, Arup, San Francisco

2013 40 Under 40: Murat Karakas, 37

Associate, Arup, Los Angeles

2013 40 Under 40: Christopher Kearney, 30

Hospitality Market Sector Leader, 
exp US Services, Maitland, Fla.

2013 40 Under 40: Robert Nixdorf, 40

Vice President, WSP Flack + Kurtz, 
San Francisco

2013 40 Under 40: Alexis D. Kurtz, 37

Project Manager/Acoustic Consultant, The Sextant Group, Falls Church, Va.