Industrial / Critical / Precision / Metal Cleaning Expert Witnesses

Paul E. Rosenfeld, M.S., Ph.D., is the Founder and Principal Scientist of RoseyFields LLC and a nationally recognized forensic environmental scientist and plaintiff expert witness. Over 25 years, his work has spanned complex toxic-tort and class-action litigation — including MTBE, PFOA/PFAS, asbestos, FELA railroad exposure, air-dispersion modeling, epidemiology, toxicology, industrial contamination, and pesticide exposure matters — with an aggregate case value of approximately $14 billion, and he has been deposed approximately 150 times in 31 states.

Litigation Support

Dr. Rosenfeld's opinions are based on established scientific methodologies, quantitative exposure models, peer-reviewed scientific literature, published technical methods, and reproducible calculations that can be independently evaluated and tested, providing a rigorous scientific foundation for expert opinions under Daubert and related standards for the admissibility of scientific evidence. He has authored and contributed to books and technical publications concerning environmental contamination, exposure assessment, and risk evaluation and has applied these scientific methods in expert reports, litigation, depositions, regulatory proceedings, and trial testimony.

Methodologies & Scientific Approach

Dr. Rosenfeld's air dispersion modeling work applies EPA-approved and peer-reviewed models, including AERMOD, CALPUFF, and ALOHA, to reconstruct historical emissions, source attribution, and community-level exposure pathways. His exposure and dose reconstruction methods integrate environmental sampling data, regulatory exposure factors, and published toxicological and epidemiological literature to quantify human exposure to chemicals including benzene, PFAS/PFOA, TCE, hexavalent chromium, and crystalline silica, among others. Each methodology is applied transparently, allowing the underlying calculations, data inputs, and modeling assumptions to support general cuasation opinions. 

Publications & Court Qualifications

Dr. Rosenfeld has authored six books and dozens of peer-reviewed publications on environmental contamination and risk assessment. He has been qualified as an expert under Daubert and analogous standards in federal and state courts nationwide reflecting consistent application of scientifically defensible methodologies under prevailing standards for expert testimony admissibility.

Areas of Expertise:

Jorge Vizcaino, CHMM, CIH, CAC, CDPH Lead Inspector/Assessor, is a Certified Asbestos Consultant (CAC) and Certified Industrial Hygienist (CIH). He has over 26 years of experience in Industrial Hygiene Safety, Hazardous Material Assessments, Indoor Air Quality. He is an active member of the American Industrial Hygiene Association. 

Litigation Support - Jorge Vizcaino has over 23 years of experience working with the legal industry. His services are available to attorneys representing Plaintiff and Defense. Mr. Vizcaino has testified in over 30 legal cases. 

Areas of Expertise:

Background - Mr. Vizcaino is a Certified Industrial Hygienist (CIH), Certified Hazardous Materials Manager (CHMM), and California Certified Asbestos Consultant (CAC), with extensive expertise in hazardous materials, chemical exposure assessment, indoor air quality, environmental remediation, and occupational health and safety compliance. Mr. Vizcaino specializes in industrial chemical exposure assessments, crystalline silica and noise monitoring, hazardous waste characterization (TCLP, TTLC, WET), asbestos and lead abatement oversight, and emergency response for hazardous releases. He has developed and implemented site-specific health and safety plans (SSHASP), negotiated regulatory compliance actions, and provided strategic environmental guidance to senior management teams regarding operational risk and capital projects. 

In addition to his consulting work, Mr. Vizcaino has extensive experience as an expert witness in toxic tort, microbial contamination, asbestos/lead exposure, catastrophic fire, and carbon monoxide cases. He has participated in depositions, regulatory negotiations, and courtroom testimony in both plaintiff and defense matters.

Retained expert witness with 33+ years in building science associated with Water Damage, Mold Testing, and Indoor Air Quality. Approved expert witness.

SERVICES OFFERED

• Forensic indoor air quality investigation and expert report writing
• Customized remediation and clearance protocol development
• Hazardous material, moisture, and mold assessment
• Deposition and trial testimony
• Billing and document validation for breach of contract and remediation disputes