Mary Anne Lerro

Senior Forensic Building Scientist & Industrial Hygenist


Mary Anne Lerro has over ten years of experience in forensic consulting, building science, and industrial hygiene throughout 13 states. Prior to dedicating her career to forensic consulting, Mary Anne started her career in asbestos consulting and cradle to grave property management operations in the commercial and residential sectors of the northeast U.S. Her expertise has been trusted for evaluating major catastrophe response, water loss, mold investigations and restoration protocol, evaluating duration of property damage, construction defect assessment, origin/cause analysis, indoor air quality consulting, and lead/asbestos design consulting. She also provides expert litigation support services.

Mary Anne’s extensive experience includes managing high caliber projects for private and public clients in skyscrapers, hospitals, schools, industrial factories, condominiums, hotels, Department of Defense assets (DOD), as well as residential structures.


  • Florida State Mold Assessor (MRSA)
  • Florida State Mold Remediator (MRSR)
  • Level 1 Certified Infrared Thermographer
  • FAA Remote Pilot (Drone) Certified
  • NIOSH 582 Certified
  • Asbestos Project Designer
  • Asbestos Building Inspector/Surveyor
  • Asbestos Contractor Supervisor
  • Asbestos Management Planner
  • Lead RRP Certified
  • OSHA 10 Hour Safety
  • Certified Boom & Scissor Lift Operator
  • CSP, CIH in training



Featured Experience

2023 Deposition support, Grain Valley, MO

Expert litigation experience in microbial assessment deposition. The deposition victory resulted in a favorable settlement agreement for our client.

Hurricane Ian, Daytona Beach, FL

Conducted a detailed assessment of storm damage and related moisture intrusion assessment, establishing the cause and origin of distress within 35 multi-story apartment structures.

Yakov’s Performing Arts Theatre, Branson, MO

Managed a multimillion-dollar loss involving a moisture assessment throughout a vintage theatre. The assessment included a detailed investigation and repair protocol for specialty tapestries, vintage curtains, and wall textiles.

Hurricane Ida, Wyndham Garden Inn, LA

Conducted a 3-story commercial storm damage evaluation and microbial growth analysis at the Wyndham Inn in Baton Rouge, Louisiana.

200 Asbestos Free Schools Initiative, School District of Philadelphia, PA

Managed AHERA regulations in Philadelphia schools which resulted in achieving the “200 asbestos-free schools” goal. Assessments included AHERA 3-Year asbestos re-inpections, 6-month surveillance inspections, asbestos sampling, and abatement supervision in 120 schools.

Cooling Tower Program, Philadelphia Dept of Public Health, PA

Managed legionella assessments and bacterial water sampling at over 75 private commercial structure cooling towers to derive statistical data for the DOH. The data initiated the birth of a federal legionella management program.

Dover Air Force Base, DE

Engaged in a 5-year long metal and bacterial potable water testing contract.

Commercial Asbestos Survey, VA Medical Center, Lebanon PA

Conducted a 3-month, 23-building asbestos survey prior to a campus-wide hospital renovation.

IAQ Consulting, Jefferson Health System Hospital, NJ

Performed asbestos surveys and mold remediation oversight at hospitals throughout the Jefferson Health system. Managed asbestos abatement projects throughout the healthcare system resulting in over 120 asbestos-free areas.

Legionella Assessments, Edward Hines VA Hospital, IL

Organized/operated the campus-wide regulated VA legionella sampling program which resulted in successful regulatory compliance.

Environmental Sustainability Project, School District of Philadelphia, PA

Conducted mold and lead investigations, mold and lead remediation oversight, moisture intrusion reporting, lead in water sampling, and active leak reporting. The project reduced fungal growth and lead paint exposure by 40% in over 300 schools.

Hurricane Laura & Ida Cat Evaluations, LA

Conducted wind and storm damage evaluations of 12 residential and 3 commercial buildings in the New Orleans area.

Hailstorm Moisture Evaluation, Mountville Mills, Inc. GA

Managed moisture mapping and moisture management inside four 50,000+ square foot manufacturing plant facilities following a hailstorm water intrusion. The assessment helped our client manage multimillion dollar remediation expenses and scopes.

Property Management and Operations, NJ, PA

Managed demo/renovation scopes, budgeting, rental negotiations and estimating for both residential and commercial properties in PA and NJ. Maintained building systems (HVAC, Plumbing, Electrical). Conducted operations for short-term, seasonal, and long-term rental units. Resulted in an 85% return on investment for the duration of the term managing the business.

Origin, cause & duration assessments, FL

Managed forensic assessments for insurance clients in over 100 residential structures throughout Florida. Provided scientific method-based results and tangible system testing results to clients for water loss events and construction defects.

Comcast Tower, PA

Completed air quality testing during construction of the Comcast skyscraper.