Bert Tier is a Dutch cartoonist and illustrator from Amsterdam who works mostly through publicity agencies. He began his comics career in the late 1970s through the alternative comics magazine De Vrije Balloen and the publications of Espee, Ger van Wulften's publishing firm. Among his recurring characters were 'Jan Kneuterman', 'De Janssens' and 'Jut en Jul in de Jungle'. He also had comic strips in Aktueel and Panorama.
Since then, Tier has done marketing campaigns for Coca Cola, Aegon insurances, the Dutch government, Filofax and Hästens, among others. He was also behind the so-called "flippo" discs that came with Smith's potatochips in the 1990s. He still makes the occasional comic strip for corporate and commercial purposes.