Thomas Graf


Thomas Graf joined Greentube in September 2011, with a career marked by consistent success, and a driving ambition which has led the company to its current position as one of the industry’s leading full-service online and mobile gaming provider. In total, Thomas has spent more than two decades in the global gaming industry, gathering invaluable experience in R&D, marketing, intellectual property and operations management within all gaming verticals, leveraging that knowledge to significantly enhance Greentube’s worldwide standing.

He has also founded and been involved in host of major gaming entertainment businesses internationally at an executive level, including businesses in the US, Europe and Australia. His main responsibilities at Greentube include strategic planning, new business development, product and game development, intellectual property and integration management, leading the way as the company continues to roll out a growing portfolio of impressive, award-winning products and services.

Georg Gubo


Georg Gubo joined Greentube in 2015 after many years in leading roles within the gaming sector, bringing his experience as an industry executive to Greentube as Chief Operating Officer, where he is responsible for the Global Business Development strategy.

This role involves managing the daily activities of the Greentube Group and its subsidiaries, overseeing the company’s server-based gaming solution Greentube Plurius, as well as its social gaming offering Greentube Pro and more.

Michael Bauer


Michael Bauer joined Greentube in February 2015, moving from the NOVOMATIC Group. His extensive experience in corporate and structured finance, as well as his strong project management background made him perfect for the dual role as Greentube’s Chief Gaming Officer and Chief Financial Officer.

Within this dual role, Michael is responsible for group finance matters, as well as steering the strategic direction of the game portfolio, game production, operation, sales and corporate marketing departments.

Florian Saiko


Florian Saiko maintains his multifaceted roles within the NOVOMATIC Group while also serving on the board of directors at Greentube since 2023, taking up the mantle of Chief Integration Officer. With a diverse background in various capacities in CFO and COO roles, his extensive experience proves invaluable in both contexts.

As Greentube’s CIO, he plays a pivotal role in orchestrating post-merger integration, driving business transformation, and facilitating the consolidation of the rapidly expanding corporate group.

Ronald van den Brink


Ronald van den Brink joined Greentube in 2010 as Acquisition Manager before becoming Head of Acquisition and then B2C Marketing Director. His achievements in this area did not go unnoticed, and he was promoted to Chief Commercial Officer at Greentube in 2017.

In his role as CCO, Ron oversees a large array of B2C brands, encompassing both RMG and Social Casino operations, including household names such as StarGames, GameTwist, Admiral and many more.


Obaid ur Rehman Malik


Obaid ur Rehman Malik began his journey at Greentube in 2016 as a Delivery Manager before being promoted to Head of Corporate Portfolio in 2017. His vast expertise and excellence in his field were rewarded in 2019, when he was promoted to the Management Board as Chief Technical Officer.

In his role as CTO, Obaid is responsible for the IT organization throughout the Greentube Group, as well as overseeing the platform supporting B2C, RMG and Social side of the business.