Koorosh has worked as an academic and Professional [Transportation] Engineer in both the Public and Private sectors. Koorosh has been employed in various municipalities and some large private organizations, specializing in heavy construction. His past projects vary from High Rise Buildings to Civil Construction including Roads and Bridges. He is currently involved with the Transport for NSW and Department of Transport (Victoria) as a senior technical advisor working on various civil Infrastructure projects such as Sydney Metro, and recently Suburban Rail Loop. He has also conducted various independent short courses for professional bodies such as John Holland, VicRoads, etc. Koorosh is a reviewer for assorted International Journals and conferences globally. In addition, he provides guest lectures for various Engineering postgraduate programs, at several Universities throughout Australia. Koorosh's areas of interest include (Listed as a media expert on the RMIT expert guide): Transportation Infrastructure engineering and management, Heavy construction engineering, Steel engineering and construction (including Modular construction and fabrication), Composite materials in construction, Structural analysis and design, and Seismic rehabilitation of existing structures.