Cosmos Holdings Inc. announced that it has added Tom Kolefas to its Advisory Board. Kolefas brings more than 25 years of Wall Street experience on the buyside - managing both mutual fund and institutional equities at TIAA Investments, Jennison Associates, Loomis Sayles, Mackay-Shields and Bank of New York; as well as industry experience as a chemical engineer and corporate development officer at Engelhard/BASF.