Our Team


Dr. Joseph Yeager, Ph.D.

Dr. Yeager consults to domestic and international companies on competitive positioning strategy and executive coaching using technology he developed that is in worldwide use among Fortune 500 clientele. His innovations have surpassed the classic quantitative and qualitative measurement technologies by developing innovative measurement technology featuring psycholinguistic-systems analysis for motivational profiling. With this behavioral engineering technology, psycholinguistic mechanisms driving behavior change have been developed and used for the prediction and enhancement of human behavior in individuals, organizations and populations. Interventions in corporations, teamwork, marketing and advertising that precisely change behavior have advanced the behavioral field by a generation. Dr. Yeager's innovations continue to advance motivation, persuasion, influence and decision-making technologies. He publishes in major management and psychology journals and also reviews for refereed journals. He is the author of numerous books on human behavior and business performance. Before starting his own firm in 1975, he was a senior executive in the airline, pharmaceutical and psychological testing industries.


Linda Sommer, Ph.D.

As a principal of SommerYeager, LLC, Dr. Sommer has expanded the firm's leading edge technology into a highly visible force within the international business community, garnering a strong following in numerous industries. Sommer provides state of the art solutions and answers unobtainable by traditional means. In addition to corporate strategy work, Dr. Sommer has coached executives and officers in the Fortune 500 companies for over twenty years and has been much sought after as a keynote motivational speaker in the U.S., Europe, and South America. One of her specialties is the rapid development of executives into powerful communicators and leaders in the context of escalating demands on corporate performance. She has been a major player in IPOs, corporate reorganizations and corporate turnarounds. As a venture capitalist, she has developed many entrepreneurial business situations. A great deal of her work is embedded within many of the advertising campaigns seen in today's media. She is a published author in the business press and in professional journals.


Christophe Geerkens - European partner

Christophe's unique international experience as a management consultant adds significant value to client situations. His expertise in communications and decision making resonates with decision makers. His experience ranges from developing leadership and communication skills in decision makers to managing executive talent and culture integration. His coaching clients find his expertise offers rapid positive impact on their results, their careers and their communications ability in mission-critical situations. His depth of experience has been earned from major international companies. He offers clients a depth of understanding that produces tangible results in their work. His expertise with the Sommer SurveyTM and the Yeager ModelTM serve as indicators of his strategic depth and horsepower in serving his clientele.


The Top Choice for Fortune 500 Companies

The technology and expertise that have made SommerYeager the top choice for Fortune 500 decision makers are now finding wider distribution via the internet and the Sommer Survey.

Executive assessment in a high-tech package™ is available only through SommerYeager, the proven leaders in motivation and decision making technology for business excellence.



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Phone: 610.560.1284 | Fax: 484.323.6288 | Email: info@SommerYeager.com