"Panelists at the ""Missing Middle Housing"" program held Oct. 12, 2018 at Drexel University were, from left: Daniel Parolek of Berkeley, CA-based Opticos Design; Sarah Peck of Progressive New Homes, Malvern, PA; Kara Kneidl of 5th Square; and Kevin C. Gillen, Ph.D., senior research fellow at the Lindy Institute for Urban Innovation at Drexel University"