About Jeff Greenstein

Jeff Greenstein
Jeff GreensteinFounder

Jeff Greenstein is the co-founder of Greenstein Family Foundation, driving meaningful change in the foundation’s core areas of giving. After co-founding and running Quellos Group, a large alternative investment management business, Jeff now focuses his energies on a broad array of investments, building businesses and philanthropic activities. Jeff is the CEO of the private investment firm YIS Capital and co-founder of the Greenstein Lab.

Jeff relishes the opportunity to work closely with the leaders of the organizations and causes he cares about—first to imagine the possibilities for change, and then to develop a strategic plan for making such goals a reality. He enjoys rolling up his sleeves and engaging in extensive dialogue to clarify the purpose of an initiative and to refine its path.

This has included working closely with an organization’s leadership team to build and expand its reach and impact worldwide, as he has done with Brothers For Life. He also brainstormed with local leadership to create, and subsequently fund, the first endowed executive director within its national network with the Hillel at the University of Washington. Jeff worked with the Jewish Day School of Greater Seattle to help execute the school’s transformative building capital campaign. Through his work with the Samis Foundation, Jeff developed for the Trustee board of a large foundation a multi-year strategic and tactical plan to bring focus and clarity to their efforts. In working with UW Medicine, Jeff investigated and subsequently funded cutting edge medical equipment to meaningfully expand research capabilities.

In addition to driving specific projects, Jeff Greenstein has held long-term leadership positions with organizations such as the University of Washington, Seattle Art Museum, UW Medicine, The Samis Foundation and The Jewish Federation of Greater Seattle.   

Jeff is also the Co-Founder, Chairman and Interim CEO at 98point6. 98point6 is pioneering a new approach to primary care by pairing deep technology with the expertise of board-certified physicians. Their innovative service offers consistent access to comprehensive care in sickness and in health, and includes diagnosis, treatment, prescriptions and labs as well as consultation for any health-related question. 98point6 provides accessible care with uncompromising quality—all at a massively lower cost than anything else on the market today.