About Us: Staff

CGP’s Commercial Science Division is managed by Drs. Rik Lennox and Dave Sharar, and is fully backed by scientists and analysts from Chestnut’s Research Institute who regularly use the full range of evaluation research modalities. 

Our scientific staff and consultants routinely publish in peer reviewed, scientific journals and have extensive National Institutes of Health grant experience. 

This breadth provides an expansive repertoire of scientific methodology  to empirically address your most important measurement or program effectiveness questions.

Just read On-site versus Off-Site EAPs in 2nd quarter JEA (2013) and as a researcher finally realized how well WOS can answer my long time clinical questions in just a one sitting…

Patricia Herlihy, Ph.D.
Owner, Rocky Mountain Research

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Dave Sharar

David A. Sharar, Ph.D., Managing Director, Chestnut Global Partners, and CGP’s Div. of Commercial Science

Dave currently oversees CGP’s international employee assistance and well-being services in over 125 countries, including Joint Venture offices with local partners in Brazil, China, Russia, Mexico, and Native America. His passion is to help EAP and Wellness providers demonstrate their program outcomes and impact using credible measures and methodologies, without disrupting program operations. Dave has published over 70 articles in peer reviewed journals and trade magazines on topics related to workplace health service program effectiveness, outcomes, pricing, ethics, quality, purchaser education, delivery models, and reform in the field.  He has presented at over 50 professional conferences or workshops. His current research focus is on measuring the effectiveness of EAP and other workplace health interventions.

Dave holds a Ph.D. from the University of Illinois at Urbana-Champaign with an emphasis in Occupational Social Work, and  a Masters in Public/Community Health. 

Rik Lennox

Richard D. Lennox, Ph.D., Vice President and Chief Scientist, Chestnut Global Partners, Div. of Commercial Science

Rik has over 25 years of experience in measurement and program evaluation, with over 50 articles in peer reviewed journals in the area of applied social measurement and research methodology.  His research interests include application of structural equation modeling to the advancement of applied measurement, the use of routine outcome monitoring for evaluation and quality assurance, and the improvement of EAP evaluation methods.

Rik is the developer of CGP’s Workplace Outcomes Suite (WOS), Education/Training Outcomes Suite (ETOS), WOS Health Coaching; WOS EAP Cluster 1 and Cluster 2; and Workplace Program Satisfaction Scale.He holds a Ph.D. in Personality and Social Psychology from Texas Tech University and a Master’s in General Experimental Psychology from the State University of New York at Geneseo.  

Mike Dennis

Michael Dennis, Ph.D., Senior Research Psychologist and Director of the Global Appraisal of Individual Needs (GAIN) Coordinating Center, Chestnut Health Systems

Mike’s research goals focus on better understanding and managing addiction and recovery over the life course.   His research includes multiple clinical trials to compare the effectiveness of adolescent treatment approaches and recovery management checkups with adults, and longitudinal studies of the pathways to recovery among adolescents, adults and older adults. He developed the GAIN, and leads the GAIN Coordinating Center.

Mike received his Ph.D. in Psychology from Northwestern University, and has won multiple merit awards and lifetime achievement awards.   He has led over a dozen studies, authored 200 peer-reviewed journal articles, chapters, manuals, or monographs, and other kinds of technical reports, and made over 359 major presentations at professional meetings or workshops.