In 1976, he started his career with a small family business named Recor SA , producing dairy products. He became the General Manager of Aligel SA, an importing company of confectionery and ice cream products, in 1981. After 5 years, he became the General Manager of Interia, a company producing hazelnut cream with significant export activities. During the same year, he acquired 50% of Chipita, a company producing snacks and in 1989 he took full control of the company by acquiring the remaining 50%.
In 1990, the Eurohellenic Fund (Olayan, De Benedetti, Alpha Finance and Titan) invested in Chipita coinciding with the beginning of the croissant production. The company was listed in the Athens Stock Exchange in the year 1994. For the next 16 years a large variety of new products was introduced and exported to many countries. Furthermore, Chipita established plants in Bulgaria, Romania, Poland, Russia, USA, Slovakia and developed new ventures in Saudi Arabia, Turkey, Malaysia, Mexico and India. In 2006 Chipita merged with Delta to form Vivartia SA . One year later, MIG acquired Vivartia. From 1/9/2006 until 15/4/2010 Mr. Theodoropoulos was the Managing Director of Vivartia SA. During the summer of 2010 Mr Theodoropoulos along with the Olayan group and other greek investors, reacquired Chipita.
Today, he is the Vice-Chairman of the Board of Directors of Hellenic Federation of Enterprises (SEV) and also member of the General Council in National Bank of Greece. In the past, he served as president of the Athens Stock Exchange Listed Companies Association, vice president of Greek Federation of Industries, vice president of Helex and member of the Board of Directors of National Bank of Greece.
Spyros is a graduate of Athens University of Economics and Business.