Stuart has dedicated much of his professional and volunteer career to the LGBT community. From 1987 to 1991 Stuart presented over 30 financial workshops to AIDS Action Committee volunteers. He served on the Board of Directors of  Positive Directions, an organization offering peer-led services to the HIV/AIDS community, from 1996 to 1999. He served as Board President for two years and assisted Positive Directions through its strategic planning process.

Stuart was honored to serve a three-year term from 2013 to 2015 on the national board of directors of the Financial Planning Association (FPA), the largest member association of financial planners in the United States. Stuart was selected in part because of his passion for advancing inclusiveness in the financial planning profession and calling attention to the needs of clients from diverse communities. Stuart has also been a member of  the Diversity Committee, a national task force of the FPA since 2010 and he served as its Chair in 2012.

In 2019, Stuart received the Allegheny College Gold Citation, an honor awarded to an Allegheny graduate in recognition and appreciation of honor reflected upon the College by virtue of professional or volunteer activities.