Deniz Marşan studied International Relations at university. Later, she finished Fashion Design Certificate Programme at Istituto Marangoni, in Milan. At Bilsar Textile where she worked at one time, she has met with Başak Dizer being her partner now. She started working as style advisor with the tv series Aşk-ı Memnu. In 2007, they founded 2Shoppers where they provide people with consultancy services for shopping, style and gift. In 2013, she became partner, style and fashion advisor at ROOM Tesvikiye which they founded together with Başak Dizer. Deniz Marşan has started to design her own bikini brand in 2015. When she completed her productions, she prepared Direct Message Swimwear brand in 2016.