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
Sondra RottyPresident | COO
Tracy HartExecutive Chair | CEO
Dirk ElspermanExecutive Vice President | CAO
John DoerrExecutive Vice President
Ellen ZimmerVice President | CFO
Jason BretzSenior Vice President
Michael TrettelSenior Vice President
Joe ScarfinoVice President | Healthcare Lead
James TillmanWorkforce Manager
Ryan WehrleCorporate Safety Director
Roslyn CroftDirector of Community Engagement
Shane SpearsEstimating Director | Energy, Industrial, Civil and Self-Perform
Tim McCoyDirector of Strategy
Greg SweesoDirector of Preconstruction and Estimating
Brian JuliusGeneral Manager | Self-Perform
Andrew NelchProject Director | Higher Education and Life Sciences Lead
Bryan ConnellyProject Director | Energy, Industrial and Civil
Nathan HartGeneral Manager | Concrete Restoration
Diane GrimsleyProject Director
