Sezgin Ismailov (born 1970), known professionally as Sez Gin, is a Turkish-Bulgarian businessman and writer. He is currently CEO of two of his companies "INFO" Ltd., a real estate company, and "BG Invest Company" an investment company. Ismailov is also an aspiring author published by Tredition GmbH Hamburg. After graduating, Ismailov began his entrepreneurial journey by creating a private coffee aperitif. In 1996 Ismailov, with a partner, founded a Bulgarian real estate agency, "INFO" Ltd, which under his leadership became the best-known company in the city. In 2007 Ismailov launched his second company "BG Invest Company". Two years later, Ismailov began publishing a regional newspaper, on which he worked for three years. In 2016 Ismailov moved to Germany with his wife and children. In 2019 Ismailov wrote his first book entitled "Manners in the Great Kingdom" and a year later his second book "The Wealth in the Great Kingdom". In 2022, Ismailov's third book, "The Heir to the Dynasty" was written. He is currently writing his fourth book. He is also passionate about reading books and buying stocks with dividends.Gold Author in the Self Improvement category. At the Golden Pencil Awards 2023 Turkiye