Cumhur is a 1996 graduate of Middle East Technical University (ODTU) with a degree in Business.
He began his career in Marketing at Dardanel. After completing his military service, he worked in the Commercial Marketing department at Henkel Cosmetics from 1998 to 2002. Between 2002 and 2016, he worked in various roles in Marketing and Business Development, and Commercial Marketing at Danone, ultimately holding the position of Turkey Sales Manager. From 2016 to 2019, he worked as the General Manager responsible for Sales and Marketing at Lezita Abalıoğlu.
Since 2020, he has been working as the Sales Director at Hayat Kimya, overseeing a team of over 400, and responsible for the categories of Baby Care, Women's Care, Adult Care, Home Care, and Hygiene Papers. Hayat Kimya is ranked 39th among the Capital 500 companies and is the leader in its own industry.