Peyman Tabatabaei

Peyman Tabatabaei

GEO1 Forensic Engineering
26040 Acero, 100
Mission Viejo, CA 92691
Mobile: 949-910-5088
Office: 949-910-5088
Introduction

Peyman Tabatabaei, PE, P.Eng., is a California-registered Civil Engineer (Geotechnical Speciality) and expert witness with more than 23 years of experience in construction claims, differing site conditions, construction defects, and geotechnical failures. His expertise includes foundation settlement, earthwork and compaction, excavation and shoring, groundwater and dewatering, slope failures, retaining and MSE walls, water intrusion, ground improvement, pipelines, HDD/trenchless construction, tunneling, and pavement failures. He has provided expert testimony in depositions, trials, and arbitrations in the United States and Canada. His experience spans residential, commercial, transportation, utility, pipeline, and major infrastructure projects.


Areas of Expertise
  • Civil Engineering
  • Construction Damages
  • Design Engineering
  • Environmental Engineering
  • Failure Analysis
  • Forensic Engineering
  • Geology
  • Geotechnical Engineering
  • Hydrology & Groundwater
  • Professional Engineering

Expert Background
Q: Please list your professional accreditations, degrees, licenses, and certificates granted:
A: Professional Engineer (PE), California; M.Sc., Geotechnical Engineering, B.Sc., Civil Engineering; more than 23 years of professional experience in geotechnical, civil, forensic, and construction engineering.
Q: Please list your affiliations or memberships in any professional and/or industry organizations:
A: Professional Engineer (PE), California; Professional Engineer (P.Eng.), Canada; M.Sc., Geotechnical Engineering; B.Sc., Civil Engineering.
Q: Please list any teaching or speaking experience you have had, including subject matter:
A: Technical presentations and professional instruction on geotechnical engineering, forensic engineering, construction disputes, differing site conditions, foundation engineering, earthwork and compaction, ground improvement, and geotechnical issues affecting major infrastructure projects.
Q: Have any of your accreditations ever been investigated, suspended or removed? (if yes, explain)
A: No
Q: On how many occasions have you been retained as an expert?
A: 6 times
Q: For what area(s) of expertise have you been retained as an expert?
A: Forensic geotechnical engineering; construction claims and defects; differing site conditions; foundation settlement and failures; earthwork and compaction; excavation and shoring; groundwater and dewatering; slope failures and landslides; retaining structures; ground improvement; pipelines and infrastructure; pavement and roadway failures; and property damage.
Q: In what percentage of your cases were you retained by the plaintiff?
A: 40%
Q: In what percentage of your cases were you retained by the defendant?
A: 60%
Q: On how many occasions have you had your deposition taken?
A: 6 occasions
Q: When was the last time you had your deposition taken?
A: March 2026
Q: On how many occasions have you been qualified by a court to give expert testimony?
A: 2 occasions
Q: On how many occasions have you testified as an expert in court or before an arbitrator?
A: 2 occasions
Q: For how many years have you worked with the legal industry as an expert?
A: +10 years
Q: What services do you offer? (E.g.: consulting, testing, reports, site inspections etc.)
A: Expert witness consulting; forensic geotechnical investigations; case evaluation and technical consulting; document and construction-record review; site inspections; geotechnical investigations and testing; causation and standard-of-care evaluations; construction claim and differing site condition analysis; damage and failure investigations; engineering analysis and calculations; expert and rebuttal reports; deposition and trial preparation; deposition, arbitration, and trial testimony; mediation and settlement support; and litigation consulting.
Q: What is your hourly rate to consult with an attorney?
A: $440
Q: What is your hourly rate to review documents?
A: $440
Q: What is your hourly rate to provide deposition testimony?
A: $525
Q: What is your hourly rate to provide testimony at trial?
A: $525
Q: Please list any fees other than those stated above (E.g.: travel expenses, copy fees, etc.)
A: Travel time billed at 50% of the applicable hourly rate. Reasonable travel expenses, including airfare, lodging, rental car, mileage, parking, tolls, and meals, are billed at cost. Other direct project expenses, specialized testing, laboratory services, and third-party costs are billed as incurred.

References

Available Upon Request