• Jeff Madden, 38, General Manager, Mortenson Construction, Madison, Wis.
• Corrie Meyer, 34, Associate, Schmidt Associates, Indianapolis
• Michael Rallo, Jr., 33, Senior Project Manager, Paric Corp., O'Fallon, Mo.
• Peter Rumpf, 32, Integrated Construction Manager, Mortenson Construction, Elk Grove Village, Ill.
• Beau Sanders, 31, Project Manager, GRAEF, Milwaukee
• Amy Slattery, 33, Associate, BNIM, Kansas City, Mo.
• Robert Summers, 34, Principal, Schultz and Summers Engineering, Poplar Bluff, Mo.
• Chuck Taylor, 38, Director of Operations, Englewood Construction, Lemont, Ill.
• Peter Todd, 34, Owner's Agent/Program Manager, The Boldt Co., Milwaukee
• Brian Volpe, 37, Vice President, Thornton Tomasetti, Chicago
• Megan Zack, 34, Director of Sustainability, Hartshorne Plunkard Architecture, Chicago

Panelists for this year's Top 20 Under 40 program include: James Arends, vice president and business development manager with Gilbane Building Co., Chicago; Fred  L. Brandstrader, senior project manager with CB Richard Ellis, Chicago, and President of the Chicago Chapter of the American Institute of Architects; Ashley Z. Hand, associate with AECOM, Kansas City, Mo; Colin Rohlfing, Sustainable Design Director with HOK, Chicago; and Anna Stern, vice president with Tri-North Builders, Fitchburg, Wis.

Look for full coverage of 2012's Top 20 Under 40 in the Jan. 30 edition of ENR Midwest.