Kushner graduated from The Frisch School before attending the University of Pennsylvania where he received a Bachelor of Arts, majoring in Political Science and Contemporary Vernacular Architecture as Cultural Artifact.
[2] After working for multiple architecture firms including Steven Holl, Jürgen Mayer H. and Lewis Tsurumaki Lewis, Kushner formed the architecture firm Hollwich Kushner in 2007 with Matthias Hollwich whom he had met in Jürgen Mayer's Berlin kitchen five years prior.
In 2012 Marc Kushner and Matthias Hollwich won MoMA PS1's Young Architects Program with their project Wendy.
Following the success of Wendy, Hollwich and Kushner received multiple commissions including the Fire Island Pines Pavilion (2013), the University of Pennsylvania’s LEED Gold Pennovation Center (2016), Journal Squared (2017), and the speculative innovation campus 25 Kent (2018).
During the financial crisis of 2007–2008, Marc Kushner and his business partner Matthias Hollwich created a digital platform to help architects promote their firms’ work.