People
Our people are our greatest asset; they are our capabilities.
Colden’s professionals combine rigorous, continuing academic training with real-world technical expertise. Our extensive and diverse experience translates into client solutions requiring little or no learning curve. With this range and depth, we have the flexibility to place qualified individuals on your project at a moment’s notice, or commit long-term, on-site resources, as needed.
Colden has Certified Industrial Hygienists, Certified Safety Professionals, Certified Professional Environmental Auditors, Certified Biosafety Professionals, and doctoral trained scientists all supported by experienced senior project managers and technical field personnel.
Senior Management Team

David R. de Lalla
Principal and President
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Michael L. Howe,
CIH
Principal / Senior Consultant
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Shannon R. Magari,
ScD, MS, MPH
Principal and Vice President, Health Sciences
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James N. Miades,
CIH
Senior Consultant
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Greg W. Richey,
MS, CIH, CSP, CPEA, AIHA Fellow
Senior Consultant
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Michele N. Shepard,
PhD, MS, CIH
Vice President, EHS Services
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Christopher J. Wesley,
CIH
Vice President, EHS Services
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Senior Consultants

Catherine Bobenhausen,
MS, CIH, CSP, AIHA Fellow, LEED BD+C
Senior Consultant
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Corey Briggs,
MSPH, CIH, CIT, AIHA Fellow
Senior Consultant
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Peter Bulman,
MS, CIH, CSP
Senior Consultant
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Mike Glowatz,
MS, CIH, CSP
Senior Consultant
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Michael B. McElhinny,
CIH
Senior Consultant
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Susan Reynolds,
MS, CIH
Senior Consultant
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EHS Professionals

Ryan Burns
EHS Specialist
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Joseph Cantone,
CSP
Project Manager, Asbestos Program Coordinator
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Aprille Darang
EHS Specialist
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Matthew Girgenti
IH Specialist
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Joshua M. Humlhanz,
CSP
Project Manager
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Daniel Inman,
CSP
Project Consultant
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Brian Jackson
Project Consultant
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Ryan Kaschalk,
GSP
EHS Specialist
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Haley MacDougall
EHS Specialist
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Adam Munson
Safety Technician
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Adam Phaneuf,
ASP
Project Consultant
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Jessica Phippard,
MPH
Project Consultant
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Thomas Rodgers,
GSP
EHS Specialist
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Chrisy C. Walsh,
MS, CIH
Project Manager
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Jordan Watson
EHS Specialist
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Mark C. Yates
Industrial Hygienist
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Administrative Staff

Katie A. McGraw
Administrative Assistant
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Ivona Popiel
Administrative Assistant
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Joyce A. Riley,
MS
Administrative Assistant
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