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"Your work performance makes it easy for your business to grow.  Nothing works better than providing people a great service with a smile!"

Mr. Kim O. Davis
Director, Financial Analysis, Arkansas Public Service Commission

About The Firm » Who We Are

Johnson Consulting Group is a woman-owned strategic consulting firm specializing in the energy efficiency field. It is headquartered in metro Washington D.C. We also have an administrative office in Portland, Oregon and satellite offices in Winter Park, Florida and Ouray, Colorado. Prior to starting Johnson Consulting Group in 2008, Katherine was the majority owner in Market Development Group.


Katherine Johnson is President of Johnson Consulting Group. For nearly 20 years, Katherine has worked closely with investor-owned, rural electric cooperatives, and municipal energy utilities. She has helped utilities design, implement, and evaluate successful programs that target all sectors of the energy efficiency market. She has also worked closely with program administrators in designing and evaluating innovative energy efficiency programs such as on-the-bill financing programs promoting whole-house energy efficiency improvements.

Katherine has been active in program evaluation and market analysis. She has completed more than 200 process and impact evaluations throughout her career as well as developed business cases for geothermal heat pumps, commercial and residential lighting, and solar PV systems, among others. She has written the Home Performance with Energy Star® compendium ( which profiles all current HPwES programs. Katherine published the "Geo Heat Pumps: Leading Energy Utility Marketing Programs, Fifth Edition" which was first released in 2007 and updated in 2009 and 2010. She also authored the Geothermal Heat Pump Chapter, Technical Handbook for the National Renewable Energy Laboratory, which was published in January 2008.  

Katherine is also active within the energy services industry including Association of Energy Services Professionals (AESP) and is a well-regarded presenter on a variety of topics including effective program design, evaluation, and implementation for Demand Side Management (DSM) programs, identifying industry “best practices” in design and evaluation, and making the “business case” for energy efficiency programs.  Katherine has received the much-deserved B. H. Prasad Award for Outstanding Contributor of the Year.

Katherine received her Doctorate in Business Administration from the University of Southern Queensland, July 2010.  Her dissertation is titled: "Changes in the strategic focus and internal operating culture of investor-owned US electric utilities due to deregulation." She earned a Masters in Business Administration from Rollins College with concentrations in Marketing and Finance, and an undergraduate degree in Business-Journalism from Indiana University.

Corine (Renie) Mahon, Project Manager
Email:; 503/747-4817 (Pacific)

Corine Mahon is the Project Manager for JCG and responsible for its website as well as sites for other events and organizations controlled by JCG.  Additional responsibilities include event registration,  marketing pieces, and coordinating company communications.  She has a Bachelor of Arts degree with a major in Communications from California State University Fullerton, CA. 


Diane Mahon, Project Coordinator, joined Johnson Consulting Group in the Spring of 2011 and is responsible for surveys/interviews and analysis.  She is being mentored into the field by Katherine Johnson.  Diane has a degree in Criminal Justice and Criminology from Portland State University.  Through studies at Portland State she learned how to study and analyze data for programs that are aimed to change behavior and improve communities.  Diane has been involved in projects in Virginia, Pennsylvania, and home state, Oregon.


Johnson Consulting Group maintains satellite offices in Colorado and Florida. This map shows the reach of the Johnson Consulting Group.  We have satisfied clients across the U.S. and Canada. 


 Fun Stuff: Check out Katherine's Condo in Ouray, CO ...  be sure to ask for the discount "KJ" rate. 

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Johnson Consulting Group | PO Box 3741 | Frederick, MD 21705

Evaluation • Measurement & Verification • EM&V • Energy Efficiency Consulting • Market Research • Program Design • Market Potential Studies • Process and Impact Evaluations • Technical Guidebooks