John S. Winkleman teaches healthcare marketing and directs the Health System Simulation and consulting practice. The Health System Simulation is also part of training programs at NewYork-Presbyterian, NYC Health + Hospitals, Mount Sinai, the American College of Healthcare Executives, CVS/Aetna HEAL and Bocconi University. He is senior judge for the annual HPM Healthcare Delivery and Management Case Challenge and faculty for Practicum Day. For over a decade, he was adjunct faculty at Fordham's Center for Nonprofit Leaders and taught marketing and fundraising at Columbia Business School's Institute for Not-for-Profit Management.

Winkleman founded Winkleman Company in 1990 after working in the public relations industry, in the administration of Clark University and as director of NYC's Greenwich House Music School. Winkleman Company specializes in media relations, reputation management, speaker training, collateral development, public service outreach, brand marketing, strategic positioning and assessment.

As a trustee emeritus of the Mount Sinai Hospital, he chaired its community and government relations committee, was a long-time member of the Public Affairs/Marketing committee, executive committee, Multicultural & Community Affairs advisory board and the Mount Sinai Hospital's Community Advisory Board. Currently, he is on the community and government relations committee, quality committee and counsel to Marketing. He also serves on the advisory boards of CIVITAS and New Yorkers for Parks.

Winkleman served on the board of the Association of Fund-Raising Professionals NYC, was one of the founders and co-chairs of their National Philanthropy Day Celebration and a co-founder of the Conference on Sustainability in the Nonprofit Sector at Columbia. For over 20 years, he has been the co-author of the Top Ten List at NYC’s National Fund-Raising Day.

He received the 2024 Judson Wolfe Excellence in Teaching Award from Columbia University, 2008 United Hospital Fund Distinguished Trustee Award, 2009 Our Town Entrepreneurship Award, 2011 CIVITAS Tribute Award and special recognitions from the Mount Sinai Center for Excellence in Youth Education and the NYC Chapter of the Association of Fundraising Professionals.