• Clarity about the project's vision, timeline and budget.
  • Customize the process around the specific obstacles that present themselves.
  • Communicate frequently; explain the right choices and options.
  • Commit to doing what has been promised.
Dan Thiele, President Thiele Geotech

Dan Thiele, P.E.
Chairman, CEO

  • 30+ years of engineering experience
  • Master of Science in Civil Engineering
  • Broad background in geotechnical, material, environmental, and structural engineering
  • Computer modeling expertise
  • Specialize in unique applications requiring customized, one-off engineering methodologies
Bob Lapke, Sr. VP Thiele Geotech

Bob Lapke, P.E.
President, COO

  • 20+ years of engineering experience
  • Master of Science in Civil Engineering
  • Broad geotechnical engineering experience working in various Midwestern geologic settings
  • Real estate background with Fortune 500 Company helps in understanding client’s perspective
  • Focused on customized solutions instead of “standing hard” on conservative recommendations

Michael Gerdes
Executive Vice President, CFO

  • 20+ years of experience in landfill soil liners, capping systems and geo-synthetic liners
  • Master’s Degree in Business Administration with finance concentration
  • Responsible for multiple laboratory accreditations and certifications
  • 25 plus years’ experience in hot-mixed asphaltic materials with two mentors
  • Second degree black belt in mixed martial arts and muscle car enthusiast

Bob Matlock, P.E.
Senior Vice President

  • 20+ years of experience in the civil and construction industries
  • Master of Science in Civil Engineering
  • Involved in hundreds of construction materials management projects
  • Oversees laboratory testing and the issuance of geotechnical reports
  • Held a private pilot’s license since 1992

Marc Casteel, P.E.
Vice President

  • 25+ years of experience in construction materials testing/special inspections
  • Bachelor of Science in Civil Engineering – Iowa State University
  • Registered Professional Engineer – Iowa
  • Radiation Safety Officer – Des Moines Branch
  • Office Manager – Des Moines Branch



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