Thomas Tellefsen

Thomas Tellefsen is a Professor in the Department of Management at the College of Business, College of Staten Island (CSI), part of the City University of New York (CUNY) system. He also holds a position on the doctoral faculty at the CUNY Graduate Center, where he serves on dissertation committees for Ph.D. candidates in business. He teaches marketing and management courses at both undergraduate and graduate levels and mentors students in independent studies and CUNY baccalaureate programs.

• PhD, CUNY Graduate Center
• MBA, Baruch College
• BBA, Baruch College
• AAS, College of Staten Island

Professor Tellefsen's primary research focuses on business-to-business marketing, with an emphasis on the role of individual boundary spanners—such as salespeople and purchasing managers—in developing inter-organizational relationships. His additional research interests include sales management, international marketing, and the application of the internet in marketing. His scholarly work explores how interpersonal dynamics and digital tools shape business markets and distribution channels.

His publications appear in leading journals such as Industrial Marketing Management, Journal of Business-to-Business Marketing, Journal of Personal Selling and Sales Management, and Computers in Human Behavior. He has presented at academic conferences and serves on the editorial board of the Journal of Business-to-Business Marketing, contributing to the advancement of research in the field.

• Member, Editorial Board – Journal of Business-to-Business Marketing
• Dissertation Committee Member – CUNY Graduate School Doctoral Program in Business
• Advisor for Independent Studies – CSI Undergraduate Students
• Mentor – CUNY Baccalaureate Candidates

His work bridges academic theory with practical applications in sales, marketing strategy, and digital transformation in B2B contexts.