Nastasi Karaiskos established Rakuten Symphony UK Ltd in January 2022.

He has been in the Telecoms industry for over 20 years, having had responsibility for general management, sales, strategy, marketing, and business development in the various roles he has held. Prior to joining Rakuten he held leadership roles at NTT, Verizon, and Colt. His technology background is within networks, mobility, cloud computing, and infrastructure.

He has overseen a handful of acquisitions, from due-diligence to integration. His career has seen him live and work in Asia, Europe, and the US. He has an MBA and attended Hult International Business School and London Business School.

He has done extensive charitable work with Coram, mentoring young adults in under privileged areas to promote creative thinking, and entrepreneurship.