Kosta graduated from the University of Sydney with a Bachelor of Arts, majoring in Archaeology and Ancient History. Kosta has had extensive experience in both historical and Aboriginal excavations across NSW. Kosta's excavation experience also includes working on sites in Tasmania, through the University of Sydney and Australian National University. These projects have provided Kosta with a range of experience in a variety of industries such as transport infrastructure, renewable energy and mining projects.
His main skills are in excavation, surveying, site recording, processing artefacts and site documentation. Kosta has also developed his professional skills through consulting in NSW and WA, building his experience in project management, report writing, GIS and liaising closely with local Aboriginal groups.