He was the following year awarded the Neuhausen Prize for his model for a speciedaler coin and was subsequently commissioned to engrave the stamps for Christian VIII's speciesdaler.

He was upon his father's retirement in 1841 employed as assistant medallist under Frederik Christopher Krohn at the Royal Mint.

During his stay in Rome he worked on two medals to Bertel Thorvaldsen and Adam Oehlenschläger.

Conradsen's most notable works as a sculptor are En Pige, som henter Vand (Danish National Gallery) and Evangelisten Marcus for Christiansborg Cjapel in Copenhagen.

Grundtvig (1861), Princess Alexandra (1863), Henrik Nikolai Krøyer (1870), Madvig (1879) and Christoffer Wilhelm Eckersberg (1883) as well as the University of Copenhagen's medal (1866),[3] Fourth Centenary of Christopher Columbus (1892).