Company
- Overview
- Mission
- Outreach
- History
- People
- Anke Dzikonski
- Antonio R. Mencarini
- Cary E. Ronan, PE, GE
- Chris R. Hundemer, PG, CEG, CHG
- Christopher Glenn, PE, LEED GA
- David G. Dixon, PG
- Dean H. Iwasa, PE, GE
- Dorinda C. Shipman, PG, CHG
- Frank L. Rollo, PE, GE
- Grover S. Buhr, PG
- Hadi J. Yap, PhD, PE, GE
- Haze Rodgers, PE, GE
- Jeffrey F. Ludlow, PG
- John Gouchon, PE, GE
- Joshua D. Graber, REA I
- Julie D. Frankel
- Kristen Lease, EIT, LEED AP
- Lori A. Simpson, PE, GE
- Maria G. Flessas, PE, GE
- Patrick B. Hubbard, PG, CEG
- Peter J. Cusack, REA
- Philip T. Tringale, PhD, PE
- Philip G. Smith, RG, CPGS, REA II
- Ramin Golesorkhi, PhD, PE, GE
- Richard D. Rodgers, PE, GE
- Scott A. Walker, PE, GE
- Serena T. Jang, PE, GE
- Sigrida Reinis, PhD, PE
People
Philip T. Tringale, PhD, PE, President, CEO and Principal Engineer
- PhD in Civil Engineering, UC Berkeley
- M Eng in Civil Engineering, UC Berkeley
- MS in Civil Engineering, Drexel University
- BS in Civil Engineering, Northeastern University
- Professional Civil Engineer (PE) California
- Hire Date 03-02-92
- Email: ptringale@treadwellrollo.com
Part of our firm’s culture is to give back to communities that have supported us. 
Phil forges close bonds throughout the engineering community. With a facility for explaining advanced technical issues, Phil is often called to serve as an expert witness on large, complex environmental cases. In addition, Phil’s years of experience leading technical projects and overseeing technical and geographic expansion activities makes him an esteemed asset to advanced education.
“We’re fortunate to have strong relationships with several universities and to be able to support student projects and charitable programs,” says Phil, corporate liaison for universities conducting advanced research in geotechnical engineering and in environmental sciences.
Phil also relishes pursuing new initiatives. As President of Treadwell & Rollo, Phil has full confidence in his team’s ability to meet all new challenges. “We work hard to attract and retain some of the best and brightest people in our industry.”
Featured Projects:
- Burbank Lockheed Plant
- View Project »
- Contra Costa Waste Service Landfill
- View Project »
- Schlage Lock
- View Project »