May 9, 2014

Diaz•Yourman & Associates (DYA) Receives CalGeo Outstanding Large Project Award for Tom Bradley International Terminal

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December 5, 2013

Diaz Yourman & Associates (DYA) moves toward net-zero energy consumption

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June 27, 2012

Santa Ana Executive Attends Infrastructure “Jobs of the Future” Event at White House

Chris Diaz discusses strategies for job creation with Administration officials and industry business leaders.

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April 28, 2012

Metro Expo Line Phase I Opens

Metro opened the Expo Line on Saturday, April 28, 2012.

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April 26, 2012

Jerry Diaz To Receive Lifetime Achievement Award

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January 1, 2011

DYA Adds Three New Owners

Congratulations to Matthew Dennerline, S. Niranjanan, and Saroj Weeraratne, who have been made Associates.

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January 1, 2009

DYA Adds Two New Owners

Diaz•Yourman & Associates' (DYA) has added Gary Gilbert, P.E. and Cherie Eifler as owners.

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December 20, 2004

Ownership Transition

DYA co-founders Jerry Diaz and Allen Yourman are pleased and proud to announce the addition of two new principals, Chris M. Diaz and V. R. (Nadesh) Nadeswaran. Chris will assume the role of President, and he and Nadesh will be leading the firm into its 13th year.

 

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Our Services

Design

  • Site and route evaluations
  • Geologic hazards
  • Seismic design
  • Site characterization
  • Subsurface drainage
  • Grading
  • Ground improvement
  • Slope stability
  • Foundations
  • Dynamic analyses
  • Pavements
  • Instrumentation

Construction

  • Material sources
  • Construction observation and testing
  • Verification of anticipated conditions
  • Evaluation of changed conditions
  • Foundation installation
  • Instrumentation
  • Claims evaluation

Environmental

  • EIR/EIS
  • Site characterization
  • Remediation
  • Solid and liquid waste disposal
  • Landfill
  • Aerially Deposited Lead (ADL) Studies
  • Phase I Initial Site Assessments (ISA)
  • Phase II Hazardous Waste Studies
  • Sustainability

Legal

  • Forensic investigation
  • Litigation support

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