Of/at

[Murad23]

Hello. Of or at in this sentence: 'Head of marketing and sales department of/at TTG Company' Thank you.

 

[BobK]

I'd use a comma, and neither: 'Head of marketing and sales department, TTG Company' . Alternatively, an article, no comma, and 'at': 'Head of the marketing and sales department at TTG Company'

b