MARGARET GUIDARELLI CIH, ROH, MSEE

Owner & Co-Founder

Margaret Guidarelli CIH, ROH, MSEE

Owner & Co-Founder

Margaret founded Hygieneering in 1987 after working in the petroleum, oil and gas industry for eight years and obtaining her Masters of Science Degree in Environmental Engineering from IIT in Chicago.  She earned a Bachelor of Science degree from Illinois State University (ISU) in Environmental Health with a minor in Biology. She also earned the credentials of Certified Industrial Hygienist (CIH) from the American Board of Industrial Hygiene and Registered Occupational Hygienist (ROH) from the Canadian Registration Board of Occupational Hygiene.

Margaret remains active in the firm’s operations to ensure the highest caliber Environmental Health and Safety (EHS) services are delivered to Hygieneering’s clients in the manufacturing, healthcare, energy, academic, real estate and construction sectors.

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Reviews

Don’t just take our word for it, listen to see what others say!

Vince M.
We rely on Hygieneering for environmental due diligence that keeps our projects moving forward and surprise free.
Vince M.
We rely on Hygieneering for environmental due diligence that keeps our projects moving forward and surprise free.
Vince M.
Vince M.
Matt S.
Hygieneering gave us a clear roadmap to OSHA compliance and helped reduce incidents across our facilities.
Matt S.
Hygieneering gave us a clear roadmap to OSHA compliance and helped reduce incidents across our facilities.
Matt S.
Matt S.
Christian G.
Their industrial hygienists translated complex regulations into practical steps our staff could follow with confidence.
Christian G.
Their industrial hygienists translated complex regulations into practical steps our staff could follow with confidence.
Christian G.
Christian G.
Heather S.
Hygieneering quickly diagnosed our indoor air quality issues and provided straightforward recommendations that reassured our stakeholders.
Heather S.
Hygieneering quickly diagnosed our indoor air quality issues and provided straightforward recommendations that reassured our stakeholders.
Heather S.
Heather S.
Melissa L.
After an incident, Hygieneering’s rapid response and follow up support strengthened our safety culture and helped us return to normal operations safely.
Melissa L.
After an incident, Hygieneering’s rapid response and follow up support strengthened our safety culture and helped us return to normal operations safely.
Melissa L.
Melissa L.