Like his contemporary Ambrosius Bosschaert the Elder, Beert was born in Antwerp. He trained with André van Baseroo, about whom little is known. Beert registered with the Antwerp guild of Saint Luke as an apprentice in 1596 and as a master in 1602. He is recorded as having taught six pupils, of whom only his nephew Frans Ykens achieved recognition.
Beert’s output seems to have consisted primarily of fruit and flower paintings, as well as still lifes of expensive luxury items. He was amongst the first artists to paint ‘laid tables’, which depicted tables set with food and silverware. He never dated his works, and only 14 paintings with a signature or monogram survive.