Marko is a managing director of Jefferies LLC in the Energy Investment Banking Group. He also worked in various leadership roles at Mobil Oil and was COO of Madison Energy Advisors. He is a Tulane engineering graduate and currently serves as chair of the Tulane University President’s Council. In addition, he is a member of the School of Science and Engineering Board of Advisors and a regional chair of the National Campaign Council for “Only the Audacious: the Campaign for a Bolder Tulane.” Marko is also a former chair of Tulane’s 35th Annual Reunion Committee and a former member of the university’s Engineering Board of Advisors. Marko and his wife, Marta, provided the lead gift to the Tulane Brain Institute, which was used to build the administrative offices and labs for the institute’s Memory and Cognition Research Cluster. The gift also supports the Marko Spark Innovation Research Fund and established an endowment to provide support for future Brain Institute research initiatives.