LEADERSHIP
Our leaders stay close to the work – guiding teams in the field and bringing decades of hands‑on experience to every project.
You’ll find them on your jobsite, bringing solutions, building relationships and mentoring the next generation. Through industry associations and community organizations, they help shape the future of construction while strengthening the city we’ve helped build for 80 years.
Meet the Team
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Sondra Rotty President | COO -
Tracy Hart Executive Chair | CEO -
Dirk Elsperman Executive Vice President | CAO -
John Doerr Executive Vice President -
Ellen Zimmer Vice President | CFO -
Jason Bretz Senior Vice President -
Michael Trettel Senior Vice President -
Joe Scarfino Vice President | Healthcare Lead -
Andrew Nelch Divisional Vice President | Higher Education and Life Sciences Lead -
James Tillman Workforce Manager -
Ryan Wehrle Corporate Safety Director -
Roslyn Croft Director of Community Engagement -
Shane Spears Estimating Director | Energy, Industrial, Civil and Self-Perform -
Tim McCoy Director of Strategy -
Greg Sweeso Director of Preconstruction and Estimating -
Brian Julius General Manager | Self-Perform -
Bryan Connelly Project Director | Energy, Industrial and Civil -
Nathan Hart General Manager | Concrete Restoration -
Diane Grimsley Project Director
