Stephen Gutmann is a career philanthropy manager and left-progressive activist. As of 2020, he held the position of first vice president on the board of Human Development Services of Westchester, a New York-based nonprofit.  He previously worked in various finance and accounting roles at the Open Society Foundations. Formerly known as the Open Society Institute, the organization is the flagship grantmaking entity within the international philanthropy and activism network funded and managed by financier and left-of-center ideologue George Soros.  
Throughout the early 2000s, Stephen Gutmann worked as the director of accounting policy and audit services at the Open Society Foundations, known at the time as the Open Society Institute, a member organization within the Soros Network.   Several years later, he had moved up to the position of assistant treasurer, receiving a salary of more than $100,000 a year, not including employee benefits and miscellaneous allowances, which totaled nearly $80,000 in 2008. 
Stephen Gutmann sits on the board of Human Development Services of Westchester, which provides various community services in the state of New York. These include behavioral and mental health counseling, distribution of government benefits such as rental assistance, and what the organization refers to as “neighborhood stabilization” in high-risk areas.  
Gutmann has been a donor to several Jewish organizations since at least the mid-2010s. These include the New Jewish Home, an assisted living facility for the elderly in New York, and the social action fund of Congregation Emanu-El of Westchester, also located in New York.