In 2018, Greenfield was cast in the lead role of Dave Johnson in the CBS comedy "The Neighborhood". He took over the role from Josh Lawson, who played the character in the pilot episode. On November 8, 2018, it was announced that Greenfield is set to reprise his role as Leo D'Amato in an upcoming 8-episode revival series of Veronica Mars. In the same year, Greenfield was cast in the recurring role of the Denouement brothers on the third season of the Netflix comedy drama series "A Series of Unfortunate Events".