[3] As a Thouron Scholar, Quelch earned a Master of Business Administration from the Wharton School at the University of Pennsylvania.

[6] Between 2006 and 2008, he served as senior associate dean responsible for coordinating the planning and execution of Harvard Business School's 2008 centennial celebrations.

In 2009, Quelch was on sabbatical leave as the La Caixa Visiting Professor of International Management and chairman of the academic advisory council at the China Europe International Business School (CEIBS), a Shanghai-based school co-founded by the Chinese Communist Party and European Commission.

From 2011 and 2013, Quelch served as dean, vice president, and Distinguished Professor of International Management at the Shanghai-based institution.

Special emphasis was placed on upgrading CEIBS research output, executive education, global awareness and fundraising.

[1] Quelch's early research focused on the application of marketing to preventive healthcare programs and appear in the article "Marketing Principles and the Future of Preventive Health Care" (Milbank Memorial Fund Quarterly/Health and Society, 1980) and other papers in the American Journal of Clinical Nutrition and Nutrition Reviews.

His books on this subject include: Since 2013, Quelch has focused on patient centricity and consumer empowerment in healthcare and written several books on the topic, including Consumers, Corporations and Public Health (Oxford University Press, 2016), Building A Culture of Health: A New Imperative for Business (Springer, 2016), Compassionate Management of Mental Health in the Modern Workplace (Springer, 2018), and Choice Matters How Healthcare Consumers Make Decisions (Oxford University Press, 2018).

Quelch's healthcare practitioner-focused articles embrace eighteen contributions in the Harvard Business Review.

His articles include "Bringing Customers Into The Boardroom" (Harvard Business Review, November 2004), "How Global Brands Compete" (Harvard Business Review, September 2004), "Building And Valuing Global Brands in the Nonprofit Sector", (Nonprofit Management and Leadership, 2007), "Governance in the Public Sector", (Directors & Boards, 2008), "An Exploration of Marketing's Impacts on Society: A Perspective Linked to Democracy" (Journal of Public Policy and Marketing, 2008), "How To Market In A Downturn" (Harvard Business Review, April 2009).

His case studies have sold over four million copies, the third highest in Harvard Business School history.

[15] In 1995, he developed the first Harvard Business School interactive CD-ROM exercise (on Intel's advertising budgeting process).

In 2018, Quelch led an initiative to offer every student at the University of Miami free access to The New York Times and The Wall Street Journal.

His long-standing ties to the Middle East led to his book, Business Strategies For Muslim Countries (Prentice Hall, 2000).

Quelch has worked as a consultant, seminar leader or conference speaker in more than sixty countries and has assisted companies, including American Airlines, Apple, Barclays, Beiersdorf, Colgate-Palmolive, Deutsche Post, GE, IBM, Intel, Nestle, Novartis, Procter & Gamble, Qualcomm, SABIC, Samsung, Sinopec, Unilever, and Walt Disney.