Building upon his retail sector expertise, until 2014, he served as Leasing Director at Jones Lang LaSalle (JLL), a prominent international commercial real estate leasing and management firm. Notable achievements include successful project implementations such as Zorlu Center, Aquaflorya, Vialand, Armada, and the Family Mall projects in Northern Iraq.
In 2014, Gümrükcü concluded his corporate tenure and established his own venture, Spaces Consultancy and Trade Inc., offering services in international and local brand representation as well as commercial real estate development.
Concurrently Gümrükcü led the realization of numerous commercial real estate development projects as a managing partner at MDM Real Estate Development Company from 2017 to 2023. He is recognized for his industry expertise and leadership qualities.

