Objective scientific and strategic advisory grounded in evidentiary discipline, regulatory understanding, and real-world complexity.
SCIENCE. STRATEGY. INFLUENCE. Scientific Analysis Built to Withstand Scrutiny
SCIENTIFIC LEADERSHIPAndrea E. Holmes, PhD
Scientific Expert Witness • Analytical Chemist • Professor
Dr. Andrea E. Holmes is an analytical chemist, professor, author, and scientific expert witness with expertise in analytical chemistry, laboratory science, scientific evidence evaluation, regulatory interpretation, controlled substances, cannabis science, and complex technical investigations.
She works with attorneys, businesses, regulators, and organizations requiring objective scientific analysis, technical review, expert testimony, and strategic guidance in matters involving scientific evidence, testing methodologies, product evaluation, regulatory compliance, and emerging technologies.
OUR PRINCIPLES01
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Objective
Independent
Rigorous
Trusted
Objective analysis. No agenda. No conflicts.Evidence-based. Methodical. Defensible.Decades of combined experience in high-stakes matters.Relied upon by attorneys, regulators, companies and policymakers.02
TRUSTED WHERE ACCURACY MATTERSHRG supports attorneys, regulators, executives, trade organizations, and policymakers confronting complex scientific, regulatory, and strategic questions.
Our work spans litigation, regulatory proceedings, legislative initiatives, and emerging industries where technical accuracy, evidentiary rigor, and informed judgment are essential.
We combine scientific expertise with strategic insight to deliver objective analysis, defensible conclusions, and clear communication when the stakes are high.
EXPERTISEIntegrated counsel at the intersection of science, law, and policy.
INSIGHTSAnalysis that informs what comes next.
REPRESENTATIVE ENGAGEMENTSLitigation
Regulatory Proceedings
Legislative Initiatives
Product Evaluation
Scientific Due Diligence
Emerging Industries