Meet The Team

Our

Testifying Experts

Jahan Eftekhar, PHD, PE

Jahan Eftekhar, PHD, PE

Michael Reyes, PHD, BME

Michael Reyes, PHD, BME

Greg Mulhern, BSME, ACTAR

Greg Mulhern, BSME, ACTAR

Russell Gill, BSME

Russell Gill, BSME

Colten Rodriguez, MSME

Colten Rodriguez, MSME

Our

Engineering Support

Colton Stolle, BSME

Colton Stolle, BSME

Aidan Gomez, BSME

Aidan Gomez, BSME

Our

Project Associate

Memo Flores

Memo Flores

Our

Administrative Assistants

Tannen Eftekhar

Tannen Eftekhar

Fallon DeVane

Fallon DeVane

Elizabeth Fraire

Elizabeth Fraire

Our

Personal Assistant

Jude Layman

Jude Layman

Our

Clerical Assistant

Jovana Zagorac

Jovana Zagorac

J. Eftekhar & Associates
Our staff of engineers and analysts provide initial consultation and case review, and reconstruction, occurrence and injury causation, product failure analysis, animation and simulation, research and testing, trial exhibit preparation, expert testimony.
Browse Our Website
Contact Information
e-mail

ContactJEA@gmail.com

phone

(210) 699-9676

location
20689 IH 10 West San Antonio, TX 78257

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Colton Stolle, BSME

Tel: (210) 699-9676 Ex:8113
Fax: (210) 699 - 9719
cstollejea@gmail.com

Colton Stolle is a dedicated engineer who possesses a unique ability to solve complex problems. After spending two years at Texas A&M - Corpus Christi, Mr. Stolle transferred and finished his Bachelor of Science in Mechanical Engineering from Texas A&M in College Station. Mr. Stolle led the Testing Team of the Texas A&M Formula SAE IC team in the 2022 season. Mr. Stolle is a Project Engineer at J. Eftekhar and Associates assisting testifying experts with site and vehicle inspections, report graphics, reconstruction analysis, and computer simulations. Mr. Stolle is also a Remote Pilot for Unmanned Aircraft Systems through the Federal Aviation Administration (FAA).

Matthew Contreras

Tel: (210) 699-9676 Ex:8106
Fax: (210) 699-9719
mcontrerasjea@gmail.com

As of February 2021, Matthew Contreras joined our team at JEA as a Project Analyst. His primary responsibilities include 3-D Scan Assembly’s, Evidence Storage Management, Graphic Development, & Inspection Assistance. He previously graduated from Northwest Vista College, earning his Associates of Arts degree in Psychology, & most recently graduated from The University of Texas at San Antonio with a Bachelor of Arts degree in Psychology. Mr. Contreras is now pursuing a master’s degree in Clinical Mental Health Counseling to pursue a career as a Mental Health Counselor.

Jonathan

Jonathan Martinez graduated from the University of Texas at San Antonio in May of 2021 with a B. S. in Biomedical Engineering. He has a background in the oil and gas industry, and the automotive service industry. Mr. Martinez is a project engineer conducting vehicle and site inspections, biomechanics, injury analysis, evidence analysis, computer simulation, testing, and compiling reports. Mr. Martinez is a member of the Biomedical Engineering Society, and is certified through the Tire Industry Association as a tire technician.

Francesca Noriega

Tel: (210) 699-9676 Ex:8108
fnoriegajea@gmail.com

Francesca Noriega graduated from the University of Texas at San Antonio in May 2021, earning her Bachelor of Science degree in Biomedical Engineering with a concentration in Biomechanics. She previously performed undergraduate research experience involving Magnetically Responsive Non-Viral Carriers for Brain Tumor Gene Delivery. After graduating, Ms. Noriega began her career as a Project Engineer with J. Eftekhar and Associates. She currently performs Engineering and Biomechanics Analysis, Equipment, Site and Vehicle Inspections, Photogrammetry Analysis, Accident Evaluation, Computer Simulations, and assists testifying experts in Crash and Injury Causation Analysis and Report Writings.

Aidan Gomez

Tel: (210) 699-9676 Ex:8111
agomezjea@gmail.com

Aidan Gomez graduated from the University of Texas at San Antonio with a Bachelor of Science in Mechanical Engineering. He is a certified Engineer-in-Training (EIT) through the Texas Board of Professional Engineers and Land Surveyors. Aidan is currently a Project Engineer at J. Eftekhar & Associates, where he assists testifying experts with site and vehicle inspections, report graphics, reconstruction analysis, and computer simulations. He is also a Part 107 certified remote pilot under the Federal Aviation Administration (FAA).

Kaley Medina

Kaley Medina is an Administrative Assistant at J. Eftekhar & Associates. Her responsibilities include review and summarizing documents, scheduling and assisting JEA engineers in case preparation. Kaley brings 6 years of experience in customer service-related positions.

Thomas Vignola

Thomas began working full time with the team in October 2019. He graduated from Geneva College in May 2019 with a Bachelor of Science degree in chemical engineering, and has previous experience in diesel emission reduction systems from interning with a research and development company. Currently he assists case lead experts with inspections and analysis, 3-D modeling of crash events, reports, and court presentations.

Memo Flores

Tel: (210) 699-9676 Ext: 8108
Fax: (210) 699 - 9719
mfloresjea@gmail.com

Eduardo G. Flores is a Project Associate at J. Eftekhar and Associates, where he supports testifying experts with site and vehicle inspections, data analysis, report graphics, and computer simulations. He holds a Bachelor of Science in Health from the University of Texas at San Antonio and is a certified Emergency Medical Technician.

Eduardo combines his background in health sciences and emergency medical services with technical expertise to contribute to the field of forensic engineering. He is also an FAA-certified Remote Pilot for Unmanned Aircraft Systems and holds certification in Bosch EDR systems. Committed to professional growth, Eduardo actively pursues continuing education and stays current with industry developments.

Ryan Hadley

Tel: (210) 699-9676 Ex:8105
rhadleyjea@gmail.com

Ryan Hadley graduated from the University of Texas at San Antonio with a Bachelor of Science Degree in Mechanical Engineering. Ryan is affiliated with the Society of Automotive Engineers (SAE), American Society of Mechanical Engineers (ASME), and certified by the State of Texas as an Engineer in Training (EIT)

Ryan is a Project Engineer performing Photogrammetry Analysis, Animation and Simulations, Mechanical and Field Investigation, Engineering Analysis, Case Evaluation, Research, Testing, Reenactments, Trial Presentations, and Report Writing.

Ryan has completed certification courses in the area of Accident Reconstruction through Engineering Dynamics Corporation (EDC), FARO, Institute of Police Technology and Management, and Crash Data Group. Ryan also has more than (4) years of experience in the Research and Design Industry worked with companies to develop projects that involve battery technologies, materials and manufacturing, and oil and gas.

Jovana Zagorac

Tel: (210) 699 - 9676  Ext: 8105
Fax: (210) 699 - 9719
jzagoracjea@gmail.com

Jovana Zagorac is a Clerical Assistant at Eftekhar Consulting LLC. Jovana performs regular clerical tasks and assists engineers in deposition preparation.

Tannen Eftekhar

Tel: (210) 699-9676 Ex: 8101
Fax: (210) 699-9719
teftekhar@jeassociates.net

Tannen Eftekhar is the director and marketing manager of Eftekhar Evidence Storage LP, with responsibilities for storage facility management, evidence security, and marketing programs. Prior to joining Eftekhar Consulting, she worked in marketing and outside sales at several companies. Tannen studied Social Work at College. Tannen is a child advocate and has volunteered her time to CASA and PEARLS programs, preparing girls for life after foster care.

Fallon DeVane

Tel: (210) 699 - 9676 Ex: 8112
Fax: (210) 699 - 9719
frodriguezjea@gmail.com

Fallon DeVane is the Administrative Manager at Eftekhar Consulting LLC. She graduated from Texas A&M University–San Antonio with a Bachelor of Business Administration degree in Accounting. Fallon performs regular administrative tasks and assists engineers in research, trial exhibit preparation, deposition preparation, and presentations. She is also certified in QuickBooks.

Elizabeth Fraire

Tel: (210) 699 - 9676  Ext: 8114
Fax: (210) 699 - 9719
efrairejea@gmail.com

Elizabeth Fraire is an Administrative Assistant at Eftekhar Consulting LLC. Elizabeth performs regular administrative tasks, helps with Evidence Storage, and assists engineers/experts in deposition preparation, file preparation, and research.

Colten Rodriguez, MSME

Tel: (210) 699 - 9676 Ex:8107
Fax: (210) 699 - 9719
crodriguezjea@gmail.com

Mr. Rodriguez is a licensed Professional Engineer in Texas and a lead researcher at J. Eftekhar and Associates, specializing in accident reconstruction and vehicle safety. Since joining the firm in 2013, he has evaluated over 1,500 crashes involving commercial vehicles, passenger cars, motorcycles, bicycles, ATVs, and pedestrians.

Mr. Rodriguez has testified in deposition and for trial presentations in civil and criminal cases. Holding numerous certifications in accident reconstruction, he has published peer-reviewed papers and delivered seminars at the graduate level and for the Texas Criminal Defense Lawyers Association. Mr. Rodriguez earned a Bachelor’s (2019) and Master’s (2022) in Mechanical Engineering from UTSA, where his thesis explored pickup truck bumper deformation for energy calculations.

Currently pursuing a PhD in Mechanical Engineering (Design and Manufacturing Systems) at UTSA, he leads research on modern vehicles and sensor technologies, advancing crash analysis and safety standards through finite element modeling and data-driven optimization.

Gregory R. Mulhern

Tel: (210) 699 - 9676 Ex:8104
Fax: (210) 699 - 9719
gmulhernjea@gmail.com

Greg Mulhern graduated from the University of Texas at San Antonio with a Bachelor of Science Degree in Mechanical Engineering. Greg is affiliated with the Society of Automotive Engineers (SAE), American Society of Mechanical Engineers (ASME), and certified with the Accreditation Commission for Traffic Accident Reconstructionists (ACTAR).

Greg has completed certification courses through the Society of Automotive Engineers in the area of Accident Reconstruction and Heavy Vehicle Event Data Recorder retrieval and Texas A&M Engineering Extension Service in the area of Collision Reconstruction. He has completed courses through Engineering Dynamics Corporation in the area of HVE-2D software and FARO in the area of Reality and Scene software. He has served since 2012 as a consultant and expert in the litigation areas of mechanical engineering, accident reconstruction. Greg has testified as expert in civil cases.

Russell Gill, EIT

Tel: (210) 699 - 9676 Ex:8103
Fax: (210) 699 - 9719
rgilljea@gmail.com

Russell Gill graduated from the University of Texas at San Antonio with a Bachelor of Science Degree in Mechanical Engineering. Russell graduated Cum Laude and is a member of Tau Beta Pi, the engineering honor society. He has been a professional technician since 1998 and is an Automotive Service Excellence (ASE) Certified Master Automobile Technician, Medium/Heavy Truck Technician, Advanced Level Specialist, Maintenance and Light Repair Technician, and Collision Repair Technician. He was a General Motors World Class Technician for 12 years and has had over 500 hours of training through General Motors Center of Learning. Additionally, Russell served as an Assistant Professor of Automotive Technology at Saint Philip’s College for 11 years.

Russell is affiliated with the Society of Automotive Engineers (SAE), American Society of Mechanical Engineers (ASME), and the American Trucking Association – Technology Maintenance Council (ATA-TMC).

Russell has completed certification courses through the Society of Automotive Engineers in the area of Accident Reconstruction, Heavy Vehicle Event Data Recorder retrieval, Vehicle Dynamics for Passenger Cars and Light Trucks, and Brake Control Systems. He has served since 2013 as a consultant and expert in the litigation areas of mechanical engineering, product failure analysis, accident reconstruction, automotive and light/medium/heavy truck systems and failure analysis, stationary and mobile machinery, equipment and structures. Russell regularly testifies as an expert in civil and criminal cases.

Dr. Michael Reyes

Tel: (210) 699-9676 Ex:8102
Fax: (210) 699-9719
mreyesjea@gmail.com

A graduate of the University of Texas at San Antonio, Michael earned his Ph.D. in the joint UTSA / UTHSCSA Biomedical Engineering doctoral program with a research focus on the age-related changes in the composition and biomechanical properties of bone. He received his Master's of Science Degree in Mechanical Engineering with a concentration in Biomechanics from UTSA.

Dr. Reyes has served as a lead analyst and consultant in automobile, product liability, and premises liability accident investigation and reconstruction. He has also served as a lead analyst and consultant in the determination of injury causation in automobile accidents. Michael has made numerous presentations at national conferences of his research in the area of hard tissue biomechanics and co authored four book chapters related to the biomechanical testing and mechanical properties of hard tissues.

Dr. Reyes has completed the Society of Automotive Engineers Accident Reconstruction Certificate program, a six-course series focusing on Vehicle Crash Reconstruction Methods, Event Data Recorders, Passenger Car and Heavy Truck Vehicle Dynamics, the Reconstruction and Analysis of Rollover Crashes of Light Vehicles, and the Reconstruction and Analysis of Motorcycle Crashes. He has also received instruction in Frontal and Side Impact Occupant Safety and Computer Aided Engineering as well as Injuries, Anatomy, Biomechanics & Federal Regulation. He has received training in advanced accident reconstruction from Texas A&M (Engineering Extension Service). He also earned Level 1 and 2 Crash Data Retrieval certification in the downloading of automobile airbag and powertrain control modules (Bosch / Collision Safety Institute).

J. Eftekhar and Associate

Tel: (210) 699 - 9676 Ex:8101
Fax: (210) 699 - 9719
​jeftekharjea@gmail.com

Jahan Eftekhar is the founder of Eftekhar's Inc. dba J. Eftekhar & Associates, Inno Tech Engineering Services, Evidence Storage at J.Eftekhar and associates and Inventive Safety Concepts. He serves as the principal and lead analyst for the companies.

He received a B.S in Mechanical Engineering and completed the coursework for M.S. in Engineering Science/Engineering Mechanics from The University of Tehran in 1974 and 1976, respectively. He received his M.S. and Ph.D. in Mechanical Engineering from the University of Texas at Arlington in 1979 and 1983, respectively.

Dr. Eftekhar has completed over (34) certification courses and seminars in the area of Mechanical Design, Instrumentation and Calibration, Vehicle Safety and Design, Brake Safety and Design, Accident Reconstruction, Computer Aided Reconstruction, Industrial Measurements and Control, Vehicle Rollover, Impact & Injury Pattern, Vehicle Seat Design, ​Low Speed Impact and Biodynamic, Occupant Safety, Motorcycle an Multi-vehicle Crash Testing, and Bicycle/Pedestrian Impact testing. He has been involved with numerous experimentation concerning vehicle dynamic and rollover stability, tire/wheel performance, airbags deployment/non-deployment, seat and sled design and testing, helmet impact testing, child seat design and testing, conspicuity and visibility at night, accessibility and wheelchair design, mechanical torso impact testing and elevator and amusement park rides.

Dr. Eftekhar is a Fellow of American Society of Mechanical Engineer and a licensed professional engineer in State of Texas.

Dr. Eftekhar is the past Chair of the Mechanical Engineering and Biomechanics Department of The University of Texas at San Antonio (UTSA). He retired from UTSA in December 31, 2010 after 30 years of service for University of Texas system and Texas Tech University. He is currently serving as an adjunct professor of mechanical engineering at UTSA, teaching courses in the area of Vehicle Dynamics and Accidental Injury. At UTSA, He taught (41) different subjects, served as the department chair and founded and directed several organizations, programs and laboratories.

Eftekhar has also taught a large number of continuing education courses and seminars in the area of accident reconstruction, inspection and examination of evidence, design for safety, occupant safety in design, new and emerging vehicle technologies, event data recorders, and low/high speed collisions.

Dr. Eftekhar has been involved in over (100) designs and patents, with majority involving users and human interaction. He was a consultant to US Department of Defense and US Air Force, which he designed, retrofitted, modified (39) technologies. He designed vehicle components and participated in the design, test and manufacturing of several cars that were sold to the public.

Dr. Eftekhar has served as a consultant and expert in the litigation area in mechanical engineering, product design, biodynamic, accident reconstruction, and product failure analysis. During this time, he has evaluated over 2500 accidents involving vehicles, mobile and stationary machinery, equipment and structures. He has served as a consultant on numerous projects with the federal and state agencies, engineering and law firms, and insurance companies. He has testified as an engineering expert on numerous criminal and civil cases in the federal and district courts. Dr. Eftekhar has authored numerous publications and regularly serves as a member of peer review committees.​