As a principal emeritus, Marshall’s focus is in the sales business area, and he leads several key client relationships. His client work has particular emphasis on changing sales models and how to retool go-to-market strategies and company competencies to compete effectively in the rapidly changing market.



A recognized authority on sales management, Marshall has consulted with companies from the Fortune 50 to startups, in industries spanning healthcare and life sciences, chemicals, consumer products, financial services, construction/building products and utilities. He has worked on projects in the U.S., Canada and several Latin American countries. A featured speaker at industry conferences, Marshall is an academic director and adjunct faculty (executive education) at Northwestern University’s Kellogg School of Management. He is the author of several published articles on sales and marketing issues.



Marshall’s previous ZS leadership positions include head of the global sales business area, leader of the Midwest region, and founder/leader of the medical products and services industry vertical. Before joining ZS in 1990, Marshall worked for several years at IBM, selling to Fortune 500 insurance accounts.



Marshall holds an undergraduate business degree with distinction from the University of Wisconsin-Madison. He also holds an MBA with distinction from the Kellogg School of Management at Northwestern University.