In 1843, he was admitted to the Royal Danish Academy of Fine Arts and became an assistant in Herman Wilhelm Bissen's studio when he was in his twenties.

[1] Evens belonged to the group of sculptors who, with Bissen and H. E. Freund, continued the Neoclassical tradition from Bertel Thorvaldsen but gradually represented the transition to Naturalism.

He also contributed to the decoration of the Marble Church with the statue of Hieronymus and created the group sculpture Faun and en Satyr for the complex at Gammeltorv in Aalborg (1850) and A Neapolitan Fisherman Teaches His Son to Play the Flute for Store Strandstræde in Copenhagen and on Rustenborgvej in Lyngby-Taarbæk (1861).

He also created two memorials to Caroline Amalie (1882 in Sorgenfri Palace Park, Lyngby-Taarbæk and Frederik VII which was installed on the marketplaces in Give (1868), Næstved (1870) and Sorø (1877).

He has also portrayed a number of historical figures, including Saxo and Snorre, Herluf Trolle, Birgitte Gøye, Arild Hvidtfeldt, Griffenfeld and Niels Juel.