Daniel Sierra graduated from the Art Institute of Seattle. He got his "foot in the door" when he landed an assistant designer position at Teneues Publishing Company. There, he designed a wide array of calendars in themes ranging from Impressionism to Pop Art. Afterwards, Daniel worked for Taylor & Francis Group as an art assistant, designing academic and trade books. This was followed by a stint working on interiors at Oxford University Press, and he has since been involved in freelance projects.