He represented the Netherlands three times at the Olympic Games and is a multiple National, European and World Champion.

He graduated as a Maritime Officer and Technical Business Administration before participating in the 2008 Olympic Games in Beijing.

He also participates in the Olympic Games in Rio de Janeiro and reaches the tenth place.

Postma spent the first seventeen years of his life in Terkaple, a tiny village in Friesland.

As a child, he spent a lot of time playing different sports: football, tennis, speed skating, and sailing.

After returning from his internship at sea, Postma started preparing for the 2004 Olympic Games in Athens.

In this phase of his sailing career, Postma is in search how to fully utilize his potential and is on the look for the right rhythm and suitable partners.

He qualified three times for the Olympic Games (2008, 2012 and 2016) and achieved good results during the Pre-Olympics: he won silver twice (2007 and 2015) and bronze once (2011).

In 2019 he coached the Hungarian Zsombor Berecz, who qualified for the Olympic Games (Finn class) under the leadership of Postma and won bronze at the World Cup.

Postma also coached the Turkish yacht racer Alican Kaynar who wins the Olympic Games (Finn class).