While in the bank supervision function, he obtained significant domestic and international regulatory experience related to the Basel II Capital Accord.

As President and CEO of the Federal Reserve, Rosengren supported a number of efforts to expand the Boston Fed's outreach and impact on low- and moderate-income communities - including hosting foreclosure-prevention workshops for New England residents during the Great Recession,[6] and running a competition for postindustrial New England communities to develop cross-sector collaboration and ultimately help improve the lives of lower-income residents.

[7] Rosengren also supported the Main Street Lending Program, which loaned to small and medium-sized businesses during the pandemic,[8] as well as the Money Market Mutual Fund Liquidity Facility, which provided loans to money market funds over the first thee months of the pandemic.

[9] Rosengren is a visiting professor at the MIT Golub Center for Finance and Policy[10] where he is involved in the Institute's central bank digital currency research collaboration with the Boston Fed.

[12] In October 2020, Rosengren helped organize and participated in a “Racism and the Economy” series in collaboration with the presidents of the Minneapolis and Atlanta Reserve Banks.

[15] During the time that he made these trades, the Fed had begun buying $40 billion of this type of debt per month, a fact that Rosengren, as a Federal Open Market Committee participant in 2020, would have had non-publicly available knowledge of; he had also advocated specific Fed policies that would have a bearing on the value of these assets.