Calibration that ensures data is accurate and repeatable

"We recognize they’re very effective at what they do and they pretty much lead the pack in that regard, so that’s why we lean on them."


California Division of the State Architect

Eric France, Construction Supervisor II

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55+ years of experience
3,000+
PSP participants
23,000+
samples shipped per year
1,000
laboratory assessments per year
2,000+
accredited labs









Certified FWD Calibration Center Operators

The following FWD calibration center operators have been certified by AASHTO for proficiency in calibration of falling weight deflectometers in accordance with AASHTO R32. Please note that the calibration center name and location listed for each operator indicates the site where the audit was conducted. Certification is issued for individual operators and is not site specific, however, adequate facilities and calibration equipment are an important component of performing a successful FWD calibration.

Operator Name Center Name Center Location Expiration Date View Certificate
Waldo Herrera Corrales APSA Ltda. Chile Santiago, Chile March 17, 2024 PDF
Paul Smith Colorado Department of Transportation Denver, Colorado June 19, 2025 PDF
Johan Galindo Dynatest Colombia Bogota, Colombia July 6, 2025 PDF
Juan Garcia Dynatest Colombia Bogota, Colombia July 6, 2025 PDF
Adriano Marcio Da Silva Junior Dynatest Engenharia Ltda. Jacarei, Brazil April 20, 2023 PDF
Andrey Alves Ferreira Dynatest Engenharia Ltda. Jacarei, Brazil April 20, 2023 PDF
Ruy Hernandes Dynatest Engenharia Ltda. Jacarei, Brazil April 20, 2023 PDF
Adam Ashley Dynatest US, Inc Gainesville, Florida August 30, 2023 PDF
Travis Ashley Dynatest US, Inc Gainesville, Florida October 4, 2024 PDF
Jacob McDonald Dynatest US, Inc Gainesville, Florida October 4, 2024 PDF
Anthony Okon Dynatest US, Inc Gainesville, Florida October 4, 2024 PDF
Richard Smith Dynatest US, Inc Gainesville, Florida October 4, 2024 PDF
Michael South Dynatest US, Inc Gainesville, Florida October 4, 2024 PDF
Shams Arafat ERES International, Inc. Savoy, Illinois January 30, 2023 PDF
Josh Black ERES International, Inc. Savoy, Illinois January 30, 2023 PDF
Tim Worstell ERES International, Inc. Savoy, Illinois January 30, 2023 PDF
José Luis Navarro Barajas Evaluación Integral de Obras Civiles, S.A. de C.V Purísima de Bustos, Gto., México September 7, 2024 PDF
Andrés Eduardo Ambriz Mecillas Evaluación Integral de Obras Civiles, S.A. de C.V Purísima de Bustos, Gto., México September 7, 2024 PDF
Gustavo Palomino Rodríguez Evaluación Integral de Obras Civiles, S.A. de C.V Purísima de Bustos, Gto., México September 7, 2024 PDF
Gary Sanati Foundation Mechanics, Inc. El Segundo, California June 21, 2025 PDF
Gary Sanati, Jr. Foundation Mechanics, Inc. El Segundo, California June 21, 2025 PDF
Adrian Elizondo GeoSense SAS Bogota, Colombia August 15,2025 PDF
Miguel Saumett GeoSense SAS Bogota, Colombia August 15,2025 PDF
Brian Bell Indiana Department of Transportation West Lafayette, Indiana October 24, 2025 PDF
John Childers Indiana Department of Transportation West Lafayette, Indiana October 25, 2025 PDF
Hobert Deaton Indiana Department of Transportation West Lafayette, Indiana October 24, 2025 PDF
Brian Gross Indiana Department of Transportation West Lafayette, Indiana October 6, 2023 PDF
Maurice Hendryx Indiana Department of Transportation West Lafayette, Indiana October 24, 2025 PDF
Connor Kirts Indiana Department of Transportation West Lafayette, Indiana October 24, 2025 PDF
Dustin Leslie Indiana Department of Transportation West Lafayette, Indiana October 6, 2023 PDF
Andrew Riley Indiana Department of Transportation West Lafayette, Indiana October 24, 2025 PDF
Mike Sanders Indiana Department of Transportation West Lafayette, Indiana October 25, 2025 PDF
Andrey Ferreria Infraconsult Consultoria De Engenharia LTDA Sao Paolo, Brazil December 28, 2025 PDF
Keishi Horiguchi Infraconsult Consultoria De Engenharia LTDA Sao Paolo, Brazil December 28, 2025 PDF
Ruy Junior Infraconsult Consultoria De Engenharia LTDA Sao Paolo, Brazil December 28, 2025 PDF
Greg Larson Minnesota Department of Transportation Maplewood, Minnesota October 7, 2024 PDF
Bill Hancock Montana Department of Transportation Helena, Montana December 12, 2025 PDF
Chris Lang Montana Department of Transportation Helena, Montana December 12, 2025 PDF
Kristofer Coker Pennsylvania Department of Transportation Harrisburg, Pennsylvania February 15, 2025 PDF
Steve Nixon Pennsylvania Department of Transportation Harrisburg, Pennsylvania February 15, 2025 PDF
Yugen Moodley QESH Advisory Services Westmead Kwazulu Natal, South Africa July 25, 2024 PDF
Felipe Camargo Roadrunner Engenharia Ltda Jacare, Brazil October 20, 2025 PDF
Luciano Aparecido de Moura Roadrunner Engenharia Ltda Jacare, Brazil October 20, 2025 PDF
Daniel Felipe Vale Roadrunner Engenharia Ltda Jacare, Brazil October 20, 2025 PDF
Rasmus Hansen SWECO Danmark, A/S Kolding, Denmark May 31, 2023 PDF
Michael Henriksen SWECO Danmark, A/S Kolding, Denmark May 17, 2025 PDF
Karsten Voss SWECO Danmark, A/S Kolding, Denmark May 17, 2025 PDF
Doug Bradley Tetra Tech Canada, Inc. Edmonton, Alberta, Canada March 1, 2025 PDF
Richard Hebert Tetra Tech Canada, Inc. Edmonton, Alberta, Canada March 1, 2025 PDF
David Newberry Tetra Tech Canada, Inc. Edmonton, Alberta, Canada March 1, 2025 PDF
Kalin Stoyanov Tetra Tech Canada, Inc. Edmonton, Alberta, Canada March 1, 2025 PDF
John Ragsdale Texas Department of Transportation College Station, Texas June 23, 2025 PDF
Laslo Tot TMR Ltd. Cambridge, Ontario, Canada April 1, 2024 PDF
Julian Brotschi University of California Pavement Research Center Davis, California August 17, 2025 PDF
Stefan Louw University of California Pavement Research Center Davis, California August 17, 2025 PDF
Rodrigo Pena VVPave Lima, Peru December 7, 2025 PDF
Marcelo Veas VVPave Lima, Peru December 7, 2025 PDF
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