[citation needed] Soll's first position was as a lecturer at Princeton University, where he worked for two years, from 1997 to 1999, and then as a professor of history at Rutgers University-Camden from 1999 to 2012.
Soll's first book, Publishing The Prince (2005), examines the role of commentaries, editions, and translations of Niccolò Machiavelli produced by the previously little-studied figure Amelot de La Houssaye (1634–1706), who became the most influential writer on secular politics during the reign of Louis XIV.
Grounded in analysis of archival, manuscript, and early printed sources, Soll shows how Abraham Nicolas Amelot de la Houssaye and his publishers arranged prefaces, columns, and footnotes in a manner that transformed established works, imbuing books previously considered as supporting royal power with an alternate, even revolutionary, political message.
With these and other projects in progress including an intellectual and practical history of accounting and its role in governance in the modern world and a study of the composition of library catalogues during the Enlightenment.
[9] He addressed the Hellenic Parliament about the history of public financial management in June 2018, on the eve of the end of the Greek bailout.
[10] Soll has worked closely with Spanish Prime Minister Pedro Sánchez, and has advised the Portuguese government and European Commission.