He spent several years studying at the Academy of Fine Arts, Vienna, where he had his debut with his canvas depicting the death of Marcus Aurelius.

Ender accepted, and brought back a large number of sketches that he turned into oil paintings.

During the trip, he also made contacts which later enabled him to stay at the Accademia di San Luca in Rome.

He created numerous copper engravings and religious art, but earned most of his living by painting portraits.

One of his most highly considered works is a Crucifixion scene, commissioned for the Pribce Eugen Chapel [de] at St. Stephen's Cathedral.