Oktay Erciyaz

Part of Majorel Group Luxembourg SA, Mayen Telekomünikasyon Hizmetleri AS is a telecommunications company based in Istanbul, Turkey. The Turkish company engages in the telecommunications industry. The company was founded in 2004 and Soner Cesur has been the CEO of the company since 2014. Mayen Telekomünikasyon Hizmetleri AS was acquired by Majorel Group Luxembourg SA on January 01, 2022.

Trenkwalder International AG provides human resources consulting services. It offers temporary staffing, payroll, onsite management, training, and outplacement and personnel consultancy services. It conducts operations in Germany, Hungary, Slovakia, Slovenia, Czech Republic, Croatia, Serbia, Greece, Macedonia, Montenegro, Bosnia, Rumania, Poland, Bulgary, Turkey, Albania, Liechtenstein and Switzerland. The company was founded by Richard Trenkwalder in March 1985 and is headquartered in Vienna, Austria.