Mark Bengtson - Senior Vice President, Added Value, North America
Mark graduated with a BA in Economics from New York University in 1985.  After starting in research in New York and a brief stint with Western International Research in LA, Mark joined D/R in 1989, as a Project Director.  After thirteen years in the LA headquarters,  Mark is currently Managing Director of the Orange County office.
In terms of expertise, he manages an array of types of research, including copytesting, tracking and brand strategy work.  Studies range from package goods, the restaurant category to financial services and automotive.
In his spare time, Mark enjoys travel, antiques and home remodelling.

Mark Weeks - R&D Director, Added Value, North America
Mark is responsible for systems and statistical analysis activities for D/R Added Value. During his 14 years with the company, Mark has directed the development of a number of proprietary analytical systems that are utilized in all research areas across the group. Prior to joining D/R Added Value, Mark was Senior Analyst/Chief Programmer with WCS London.  He holds a B.A. in Economics and Statistics from the University of Exeter, England.

Dennis Stefani - Executive Vice-President,  Added Value, North America
Dennis is responsible for directing D/R Added Value’s strategic market research activities. His job history covers both client and agency experience, specializing in branding and segmentation for application in both marketing and new product development fields.
Prior to joining Diagnostic Research in 1990, Dennis held the position of Vice President of Strategic Planning for Chiat/Day in Los Angeles where he was responsible for long-term strategy for Nissan and also involved in new business development. Prior to Chiat/Day, he held a variety of management positions in research, marketing and product development over a 15-year career with Yamaha Motor Company.
Dennis holds an MBA in Marketing from California State University, Fullerton. He has lectured at USC on the utilization of segmentation research for marketing and new product development and over the last five years, has guest lectured at the Pasadena Art Center College of Design on the topic of the “do's and don'ts” of utilizing consumer research in the design process.

Courtney Rothstein - Managing Director, Added Value New York
For over 12 years at D/R Added Value, Courtney has been helping clients with strategic and marketing issues ranging from postioning & market segmentation to copytesting and tracking.  Her passion for understanding what motivates brand choice has led her to play an instrumental role in developing the company's positioning and communications research methodologies.
Courtney has worked on a wide range of categories including pharmaceuticals, automotive, telecommunications, entertainment, FMCPG including clients such as Pfizer, Nissan, SBC, American Express, Sirius Satellite Radio, Snapple, ING and Colgate.  Prior to joining Added Value, she was a Director of Client Services at Lieberman Research West.  Courtney has a BS in Psychology from Union College (NY) and a MA from the University of Kansas.
Outside the office, Courtney can usually be found playing in a tennis tournament, skiing with her husband & two young children or painting in her backyard in Chappaqua, NY.