Kostis was born in Athens, Greece and has lived in Greece and the USA.
At the start of his career, he worked at Citibank (Management Associate Program) and L’Oreal (Consumer Goods division), holding the position of Product and Trade Manager before moving on in 1997.
In 1997, he joined Global Finance, the leading Private Equity firm in SE Europe, where he became Partner in 2007. At Global, he performed a number of successful transactions in Greece and the region, across a number of industries.
In 2011, he joined Andromeda Group in the role of Executive Director, overseeing the Group Finance function, M&A activity and business development of the Group. In 2016, he led the sale process of the Andromeda Group to Amerra Capital Management, a NY based agribusiness and aquaculture focused Private Equity firm.
From 2017 to 2019, he focused on the acquisition of Nireus SA and Selonda SA by Private Equity firms Amerra and Mubadala, while in 2020, as a Senior Advisor to the BOD, he dealt with post-merger integration and corporate matters. In 2021, he assumed the position of Deputy Group CEO of Avramar Seafood.
He holds a BSBA from The Ohio State University with a major in Finance and an MBA from Harvard Business School. He is married and has two daughters.