Stuart D. Bagley, MS, CIH, CSP
Industrial Hygiene & Environmental Expert Witness
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Certified Industrial Hygienist (CIH #3534)
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Certified Safety Professional (CSP #11829)
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M.S., Occupational & Environmental Health — Wayne State University Schools of Medicine and Pharmacy
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Former Federal OSHA Compliance Officer
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Former EHS Manager – General Electric
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Former EHS Manager – General Dynamics
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30+ Years of Industrial Hygiene & EHS Experience

Stuart D. Bagley
Certified Industrial Hygienist
Certified Safety Professional
Expert Witness Areas of Practice
Independent expertise in industrial hygiene, occupational exposure, indoor air quality, environmental health, and workplace safety matters.
- Industrial Hygiene & Occupational Exposure
Exposure assessment, workplace hazard evaluation, OSHA matters, and industrial hygiene investigations. - Indoor Air Quality & Mold
Moisture intrusion, mold assessment, ventilation, occupant complaints, and indoor environmental conditions. - Workplace Safety & OSHA
OSHA standards, workplace safety practices, hazard recognition, accident investigation, and regulatory compliance. - EMF & EMI
Independent evaluation of electromagnetic fields, electromagnetic interference, workplace exposures, and related claims. - Environmental Health
Environmental exposure assessment, contamination investigations, sampling and laboratory data evaluation, and technical support for litigation.
Education and Professional Credentials
Stuart D. Bagley, MS, CIH, CSP earned a Master of Science degree in Occupational and Environmental Health from Wayne State University School of Medicine and Pharmacy and a Bachelor of Science degree in Biology with a Chemistry minor from the University of Michigan.
Graduate education included industrial hygiene, environmental exposure assessment, toxicology, epidemiology, workplace health protection, and environmental health sciences.
Mr. Bagley is a Certified Industrial Hygienist (CIH) and Certified Safety Professional (CSP) with more than 30 years of experience in industrial hygiene, occupational and environmental health, workplace safety, indoor air quality, and exposure assessment.
His professional background includes service as a Federal OSHA Compliance Safety and Health Officer and environmental health and safety positions with General Electric and General Dynamics Land Systems.
Professional experience includes industrial and commercial facilities, utilities, manufacturing operations, healthcare facilities, offices, and residential properties throughout the United States.
Nationwide Expert Witness Services
Our services include case reviews, technical evaluations, expert reports, depositions, and trial testimony throughout the United States.
Why Retain a Certified Industrial Hygienist for Litigation Support?
Cases involving occupational exposures, mold, indoor air quality, environmental contamination, workplace hazards, or occupational disease often require specialized expertise to evaluate exposures and determine whether conditions are consistent with recognized standards and scientific evidence.
A Certified Industrial Hygienist (CIH) can evaluate exposure data, workplace conditions, technical records, sampling results, and applicable standards. The CIH can then translate complex findings into clear, defensible expert opinions for attorneys, judges, and juries.
Nationwide Expert Witness Services
Our services include case reviews, technical evaluations, expert reports, depositions, and trial testimony throughout the United States.
Why Retain a Certified Industrial Hygienist for Litigation Support?
Cases involving occupational exposures, mold, indoor air quality, environmental contamination, workplace hazards, or occupational disease often require specialized expertise to evaluate exposures and determine whether conditions are consistent with recognized standards and scientific evidence.
A Certified Industrial Hygienist (CIH) can evaluate exposure data, workplace conditions, technical records, sampling results, and applicable standards—and translate complex findings into clear, defensible expert opinions for attorneys, judges, and juries.
Litigation Support Services
Case Review
Review case files, technical reports, and supporting documentation.
Expert Reports
Preparation of detailed expert witness reports.
Deposition Support
Professional deposition testimony and consultation.
Trial Testimony
Clear, objective, and scientifically supported courtroom testimony.
Stuart D. Bagley, MS, CIH, CSP has more than 30 years of experience in industrial hygiene, occupational and environmental health, indoor air quality, workplace safety, and exposure assessment.
His extensive experience includes environmental investigations, occupational and environmental exposure assessments, litigation support, expert reports, depositions, and courtroom testimony for attorneys, insurance companies, businesses, and government agencies.
Clients Served
Attorneys & Law Firms
Trusted by legal professionals for objective, science-based expertise.
Insurance Carriers & Claims Professionals
Supporting insurers and adjusters with thorough investigations and analysis.
Commercial Property Owners
Providing clarity and insight for property-related disputes and claims.
Property Management Companies
Helping protect assets and resolve complex property challenges.
Healthcare Facilities
Assisting healthcare organizations with facility assessments and claims.
Government Agencies
Partnering with federal, state, and local agencies on critical investigations.
Educational Institutions
Supporting schools, colleges, and universities with expert assessments.
Manufacturing & Industrial Facilities
Delivering technical expertise for industrial operations and disputes.
Utilities & Energy Companies
Providing analysis and solutions for energy and utility infrastructure.
Businesses & Corporate Clients
Serving companies of all sizes with dependable expert support.
Frequently Asked Questions
What qualifications should an industrial hygiene expert witness have?
An industrial hygiene expert witness should have appropriate education, professional credentials, and substantial experience relevant to the technical issues in the case. A Certified Industrial Hygienist (CIH) brings recognized expertise in anticipating, recognizing, evaluating, and controlling occupational and environmental health hazards. Relevant field experience in exposure assessment, air sampling, industrial hygiene investigations, interpretation of laboratory data, and application of occupational health and safety standards can be particularly important in litigation involving workplace or environmental exposures.
What are Stuart D. Bagley's qualifications as an expert witness?
Stuart D. Bagley, MS, CIH, CSP is a Certified Industrial Hygienist and Certified Safety Professional with more than 30 years of experience in industrial hygiene, occupational and environmental health, indoor air quality, workplace safety, and exposure assessment. His background includes service as a Federal OSHA Compliance Safety and Health Officer and environmental health and safety positions with General Electric and General Dynamics Land Systems.
Can you provide expert testimony in mold and indoor air quality cases?
Yes. Expert witness services are available for mold, indoor air quality, moisture-related conditions, environmental contamination, exposure assessment, and related disputes. Services may include case review, site investigations, sampling, laboratory data evaluation, expert reports, depositions, and courtroom testimony.
Do you work with both plaintiff and defense attorneys?
Yes. Independent technical evaluations and expert witness services are provided for both plaintiff and defense counsel. Opinions are based on the available evidence, applicable standards, professional experience, and scientific information.
What types of cases do you support?
Cases may involve industrial hygiene, occupational exposures, indoor air quality, mold, chemical exposures, environmental contamination, workplace hazards, exposure assessment, electromagnetic fields (EMF), and other occupational and environmental health issues.
Can you review technical reports and evidence?
Yes. Reviews may include inspection reports, laboratory results, sampling data, exposure records, photographs, technical documents, applicable standards, opposing expert reports, and other evidence relevant to the case.
Do you provide deposition and trial testimony?
Yes. Expert witness services may include case consultation, preparation of expert opinions and reports, deposition testimony, trial preparation, and courtroom testimony.
Can you review another expert's report or provide rebuttal opinions?
Yes. Opposing expert reports, technical findings, sampling results, exposure assessments, and supporting evidence can be independently reviewed. When appropriate, rebuttal opinions can be developed based on the technical record, applicable standards, and scientific evidence.
Can you assist before litigation is filed?
Yes. Early technical review can help counsel evaluate environmental or occupational health issues, identify important evidence and data gaps, determine whether additional investigation or sampling may be warranted, and better understand the technical aspects of a potential case.
What industries and clients do you serve?
Expert consulting services are provided to attorneys, insurance companies, businesses, property owners and managers, healthcare organizations, manufacturing and industrial facilities, utilities, educational institutions, and government agencies throughout the United States.
How quickly can an expert witness case be reviewed?
Timing depends on the complexity of the matter, volume of records, deadlines, and whether an investigation or sampling is required. Initial consultations can often be scheduled promptly to discuss the case and determine the appropriate scope of review.
How much does an industrial hygiene expert witness cost?
Fees depend on the scope and complexity of the case, the amount of document and data review required, whether field investigation or sampling is needed, and requirements for reports, depositions, or trial testimony. A scope and fee arrangement can be established after an initial discussion of the matter.
What is a Certified Industrial Hygienist (CIH)?
A Certified Industrial Hygienist (CIH) is a professional who has met education, experience, examination, and continuing-certification requirements in industrial hygiene. Industrial hygienists evaluate occupational and environmental hazards using principles of exposure assessment, hazard recognition, measurement, evaluation, and control.
Need a Certified Industrial Hygienist?
Contact Stuart to discuss your case, review technical documents, evaluate environmental evidence, or determine whether expert testimony may be appropriate.
Request a Confidential Case Consultation