Oliver was born in Oisterwijk, Netherlands. He attended the Odulphuslyceum in Tilburg and obtained his high school diploma in 2020.
He is enrolled at Utrecht University where he started his studies in Science and Innovation Management in September 2021. Oliver's father,
Joes Daemen is a CEO of Somerset Capital Partners, a private equity firm in the Netherlands.
Olivers's space tourist seat on the New Shepard rocket was secured through an auction, making him Blue Origin's first customer
(i.e. a person whose flight was not paid for by Blue Origin) and the 8th person to privately fund their non-professional spaceflight.
Initially, cryptocurrency entrepreneur Justin Sun (who at the time remained anonymous) won the auction with a $28 million bid for the one
available seat on NS-16. However, Blue Origin said Sun could not make the flight "due to scheduling conflicts". Oliver's father, Joes Daemen
"had secured a seat on the second flight," said a Blue Origin spokesperson, and when Justin Sun backed out, Daemen's seat was "moved up,"
On 20 July 2021, Oliver at 18 became the youngest person to take sub-orbital first fully automated spaceflight with civilian passengers of approximately 10 minutes in duration reaching apogee 107 km (66 mi).