Rahmatullah has been working professionally in the field of Desktop Publishing, Computer Graphic Design and Advertising Media and Relation since 1991. He worked at Unitrend, Coca-Cola, Step Media as an Art director. He also serves various national and international brands with sound reputation – such as Berger Paints Bangladesh Limited, Coca-Cola, Nestle Bangladesh, Siemens Bangladesh, Perfetti Van Melle Bangladesh Pvt. Ltd., BSRM Steel, Meril Splash Beauty Soap, The City Bank Limited, Mercantile Bank Limited, American Express Card etc.