Mr. Şen started his career as Audit Assistant at Koç Holding's Audit Group Department in 2000. From 2002 to 2005, he worked as Audit Specialist at Koç Holding. In 2005, he was appointed as Internal Audit Manager of Arçelik A.Ş. and in 2008 as Finance and Accounting Group Director of Grundig Electronics / Grundig Multimedia B.V. From 2009 to 2010, he was Finance and Accounting Director of Arçelik A.Ş. / Grundig Multimedia B.V. From 2010 to 2015, he was the Purchasing Director of Arçelik A.Ş. and from 2015 to 2022, he was the CFO of Arçelik A.Ş. From 2022 to 2026, he was the CFO of Koç Holding A.Ş. 

Şen serves as President of Koç Holding Consumer Durables Group since March 2026.