 Over time he became a close personal friend of the founding editor Robert B. Silvers and Silvers' partner, Grace, Countess of Dudley.During a period of editorial reorganization in the year and a half following Silvers' death, Mendelsohn was named the first Editor-at-Large of the Review, a position created for him by the publisher, Rea Hederman, to go alongside the editorship, which is currently split between co-editors Emily Greenhouse and Gabriel Winslow-Yost.In February, 2019, Hederman also announced that Mendelsohn had been named Director of the Robert B. Silvers Foundation, as per a stipulation in Silvers' will.