Executive Committee 2017-2018


Charles Calmbacher

Bio-Coming Soon


Drew Peake

Drew Peake is a Professional Engineer with forty-years’ experience.  He is board certified in health (CIH), safety (CSP), environmental engineering (DEE), and forensic engineering (F.NAFE).  When he was president and president-elect about ten years ago, he guided Georgia Local Section through the Georgia Legislative Process for title protection.   



Bob Hendry

Bob Hendry has been working at the Georgia Tech Research Institute for 27+ years. He is in his tenth year work with the OSHA Consultation Program and is instructor for the Georgia Tech OSHA Training Institute. He has also performed research on a variety of topics related to industrial hygiene: indoor air quality, product emissions, gaseous filtration, analytical method development and sampling methods.


Della Ridley, CIH, CSP


Della Ridley is a health, safety, & environmental consultant, having recently retired from Abbott (formerly Solvay Pharmaceuticals) where she held the position of Environmental, Health and Safety Manager. Della is one of GLS’ longest-standing members who helped developed some of our initial operating procedures. She previously served as GLS Secretary and Treasurer.

Past - President


Kristen Butler, MPH, CIH

Georgia Tech Research Institute, OSHA Consultation & Training Programs

Kristen Butler has been working at the Georgia Tech Research
Institute (GTRI) for ten years. As a Senior Research Scientist at GTRI, she is both an IH consultant for the OSHA Consultation Program, and a continuing education trainer at the OSHA Training Institute. Kristen holds a Bachelor of Science degree from the University of Georgia and a Master’s in Public Health in Environmental and Occupational Health from the University of Arizona. She earned her CIH in 2012. Kristen has been an active member of the GLS since 2005: she served as Treasurer for three years and is currently the newsletter editor and assists with website administration.

Past Executive Committees


Kristen Butler - President
Charles Calmbacher - Pres. Elect
Brandon Cassidy - Treasurer
Della Ridley - Secretary


Stacy Savage - President
Kristen Butler - Pres. Elect
Brandon Cassidy - Treasurer
Della Ridley - Secretary

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