At BBDO, Dr. Pringle was first given responsibility for quantitative methods and then for all research conducted by the agency, on behalf of clients and otherwise, outside the New York Company. In addition, he became responsible for BBDO's Marketing Department,  Information Center as well as the training of young account executives within the agency. Then, in 1978, Lew was named Director of Research Services for all of BBDO Worldwide. He was elected Senior Vice President and member of the BBDO Worldwide Board of Directors (1978) and then Executive Vice President (1981). Even as Director, Dr. Pringle was able to participate personally in the improvement of the company's techniques as well as in the creation of marketing and advertising strategy. BBDO, during this period, devoted substantial resources to research, employed between 100 and 200 professionals in this function and had documented credentials as the very best in research and strategy formulation.

In 1984, after six years as BBDO Worldwide's Director of Research Services, Lew left that position to work with the Chairman/CEO and COO of BBDO Worldwide, to help them formulate a plan for the global future of the company. The task was a highly practical one; to answer the question "what organizational, structural and professional changes were needed in BBDO Worldwide to permit it to optimally address the rapidly evolving needs of its clients on a global scale?" In April of 1986, Dr. Pringle was named Chairman/CEO of BBDO Europe and, from his base in the U.K., assumed responsibility for BBDO's interests in Europe, Africa and the Middle East. At the time, the agency's Capitalized Sales were $550,000,000. During his four years tenure in this position, those sales tripled to over $1,600,000,000, while profit grew at about the same rate. Pringle regarded his biggest challenge in Europe as the integration of BBDO agencies, market by market, into an organization culturally and professionally committed to serving multinational clients in cross-border marketing and advertising efforts. Pringle numbers among his accomplishments that, during the era of glasnost, he brought BBDO to the Soviet Union, where it became a pioneer in the integration of modern Russia with the rest of the developed world.

In 1995, Dr. Pringle accepted a Chaired Professorship at Miami University in Oxford, Ohio. In that capacity, he taught, several times, the Capstone Course in Marketing Strategy as well as several courses in Market Research. Dr. Pringle also served six years as member of the Visiting Committee of MIT's Sloan School of Management, as Associate Editor of Marketing Science for 15 years and has published a number of times in that journal as well as in such journals as the Journal of Marketing Research and the Harvard Business Review. He is currently a member of the Editorial Board of the Journal of Advertising as well as a Fellow of the Royal Statistical Society.