Nate Gundrum 

He's made a home for himself in the hospitality sector
32, Senior Development Manager
Mortenson Development Inc.
Minneapolis

His ability to fill Mortenson's pipeline with more than $500 million in hotel work moved Nate Gundrum to the head of his class last year, when he was tapped to join the firm's Advanced Leadership Development Program, which prepares employees for senior management roles. Colleagues credit Gundrum with strengthening Mortenson's relationships with hotel brands, operators and debt and equity partners. Among his more notable projects is Marriott at HarborCenter, part of a $160-million mixed-use facility in Buffalo, N.Y. In his native Minneapolis, Gundrum is active in a Big Brothers program and has participated in the Middleton Outreach Ministry, a program intended to prevent hunger and homelessness by providing community members with food, clothing, housing assistance and emergency financial assistance, among other services.

Holly Hawkins

LEED projects led to top position at firm's Milwaukee operations
35, President, Milwaukee Office
Tri-North Builders
Milwaukee

During her tenure with Tri-North, Holly Hawkins has managed many of the firm's largest and most sustainable projects, from its LEED-Gold-certified headquarters to the Urban League of Greater Madison, a facility seeking LEED-Silver certification. Clients and partners frequently request that Hawkins conduct seminars on sustainability or train staff to become LEED professionals. Since she assumed its presidency, Milwaukee operations have expanded by 30%, the result of several large projects currently in planning or under way, among other factors. Hawkins is involved in a number local, state and national organizations dedicated to conservation and sustainability. She routinely speaks to students about careers in construction and works with industry members to secure funding for facilities such as Camp Helen Brachman, a youth and family center near Stevens Point, Wis.