Seth was born and raised in Bristol, Rhode Island, and began his career as a public elementary school teacher in rural Louisiana during the aftermath of Hurricane Katrina. After returning home to Rhode Island, Seth worked as a vice president at Trillium Asset Management, a socially responsible investment firm based in Boston, MA.
In his first months in office, Seth successfully championed legislation establishing new green infrastructure programs at the Rhode Island Infrastructure Bank. These programs are putting tradesmen and women to work on energy efficiency and renewable energy projects across the state, helping Rhode Islanders save on energy costs while reducing the state’s carbon footprint.
In May of 2015, Seth launched his "Transparent Treasury" initiative to help Rhode Islanders access information about how their public funds are managed. Among other features, the initiative includes a new investment policy stating that Rhode Island will only invest with fund managers that agree to full public disclosure of performance and fees, and a new online investment information center where all Rhode Islanders can see how their funds are invested. In 2017, his "Transparent Treasury" initiative was codified into law by the Rhode Island General Assembly.
Seth also worked with a bipartisan group of legislators to design and pass the 2015 ABLE Act, which will establish tax-efficient savings accounts for the families of disabled children.
Treasurer Magaziner also launched ‘BankLocal’, Rhode Island Treasury’s community deposit program which earmarks up to $30 million in state deposits to local banks and credit unions. The goal of the program is to support local financial institutions as they lend to small businesses in Rhode Island, supporting economic growth and opportunity in the Ocean State.
Seth holds a bachelor’s degree in history from Brown University and a master’s degree in business administration from Yale University. Prior to his campaign for General Treasurer, Seth served as the treasurer of Rhode Island’s Marriage Equality campaign, and as a board member of Common Cause of Rhode Island, Serve Rhode Island, and the Bristol Fourth of July Committee.
Seth and his wife live in Providence. He serves on the board of Crossroads Rhode Island, the state’s largest provider of services to the homeless.