[1] In 1636 he traveled to Dutch Brazil in northeast of South America at the invitation of the governor Johan Maurits van Nassau-Siegen.

[7] Post won a commission at court likely through the connections of his older brother and was encouraged to travel abroad by John Maurice, Prince of Nassau-Siegen.

He received 800 guilders for a landscape painting in the West Indies commissioned by Frederick Henry, Prince of Orange, leading Larsen to believe that Post set out for The Netherlands via Africa shortly before Nassau departed Brazil.

His Brazilian works strongly resemble the landscapes by his Haarlem contemporaries in terms of composition, style, and technique.

These works depict specific locations in Dutch Brazil, identifiable because of the representation of recognizable topography and buildings; most also include water.

Post includes a selection of Brazilian vegetation, and occasionally features birds and other small animals in the foreground.

The subdued color scheme, especially when compared to his post-Brazilian production, lends them a somber almost reverential quality characteristic of Dutch tonal landscapes from the 1620s to the 1640s.

They evolve to show a more condensed view and desired depth with greener flora, bluer skies, and brighter horizons.

Nearly every painting he completed in The Netherlands includes a large group of people interacting in some way, whether they are dancing or working in the sugar mills.