 After becoming proficient, he moved in with the painter Gillis Mostaert, and assisted him creating landscape paintings in the manner of Gillis' twin brother Frans Mostaert.A few of these early landscapes could be seen in Amsterdam at the home of Hendrick Louwersz Spieghel at the time Karel van Mander was writing in 1604.Soens and he had met during Karel van Mander's trip to Italy, where Soens made small pieces on copper for the Pope in Rome.