Kostopoulos arrives at the company having worked in the industry for almost 20 years, holding senior positions in product, operations and management sectors.
Win Systems sees this appointment as an opportunity to reinforce the growth strategy in its systems division.
Win Systems CEO Eric Benchimol said: “The incorporation of Elias is great news for Win Systems and for the implementation of our Systems strategy.
“His knowledge of the sector will provide an additional boost to our growth plan, especially in the Lottery and Public Gaming System divisions.”
Kostopoulos becomes the second senior appointment made by Win Systems this year, after José Luis González was hired as the business unit director for Spain back in March.