Geer Steyn initially studied art history at the university of Amsterdam, then realised that he wanted to be actively involved in producing art.

He went to the Rijksacademy of Arts in Amsterdam where he studied sculpture under Piet Esser( 1968-72).
He won the silver Prix de Rome in 1973 where after he studied for another year in Vienna under Fritz Wotruba.

He was given commissions to create monumental sculptures in Utrecht en Zaandam and has become an influential Dutch medallist, taught sculpture in The Hague (Koninklijke Academie voor Beeldende Kunsten) and in Amsterdam (Hogeschool voor Kunsten).

During the year 2004-2005 Geer Steyn has presented a masterclass entitled "The medal as a gesture".

For many years the artist has been making an annual medal, using an animal for the principal image. A trademark of his work is the hand manipulation of the wax for an initial concept, quickly followed by clay (such a nice smooth medium), to create a figure with the minimum of planes, often leaving the sculptor's fingerprints visibel in the final work.

His work is present in many musea such as:

• The British Museum, London
• Staatliche Museen, Berlin
• Worzlaw Museum, Worzlaw, Poland
• Rijksmuseum het Koninklijk Penningenkabinet, Leiden
• Het Rembrandthuis, Amsterdam
• Museum Beelden aan Zee, The Hague
• Teylers museum
• Rijksmuseum, Amsterdam

He has been active in several organizations like the 'Vereniging Voor Penningkunst' and the FIDEM (Fédération Internationale de la Medaille) in Milan, Italy.