He began his professional career in 2000 as an Assistant Inspector at Türkiye Vakıflar Bankası. In 2003, he was promoted to Inspector and became an advisor to the General Manager of VakıfBank in 2005. Between 2006 and 2008, he worked as Assistant Manager in the Treasury Department, responsible for Eurobond, CDS, derivatives, repo, and credit pricing.

From 2008 to 2010, he served as Treasury Operations Manager, leading the digitalization and automation projects of the bank’s treasury operations. Between 2010 and 2017, he worked as Strategy Development Manager, reporting directly to the General Manager. From 2017 to 2020, he served as a Member of the Executive Board at VakıfBank International AG in Vienna, Austria, holding positions such as CFO, CRO, CMO, COO, CTO, and CEO.

Between 2020 and 2022, he held senior finance roles (CFO and Finance Director) at various companies in Türkiye.

In May 2024, M. Seçkin ONÜR joined ULAK Communications Inc. as CFO and CMO. He is fluent in English and French.