How to pronounce expertise

During a recent talk I heard someone (a nonnative speaker) pronounce the noun expertise in a way I had not heard before, namely as [ˌekspɜːˈtaiz], similar perhaps to exercise (listen here). While at first I thought this was simply a pronunciation mistake, it turns out that the verb to expertise (yes, there is a verb, and it means “to study or investigate as an expert”, see here) is in fact pronounced [ˌekspɜːˈtaiz]. However, the standard pronunciation of the noun expertise is [ˌekspɜːˈtiːz]. You can listen to the correct pronunciation here.