His compositions include among others piano works, string quartets[2] and an oratorio, Des Jona Sendung (Jonah's Mission) (1908, revised and premiered 1909, later reconstructed by Vardo Rumessen).

After graduation Tobias worked as organist and choir conductor of the Saint Petersburg Estonian St. John's Church from 1898 to 1904.

[4] Tobias also began working as a musical journalist during this period and joined the literary group Noor Eesti.

Shortly after that he lived briefly in Munich and Dresden in Germany and Prague and Dubí in present-day Czech Republic.

[4] In August 1913 Tobias visited his homeland to view opening ceremonies of the new Estonia Theatre, where he also conducted his own compositions.

After returning to Berlin, Tobias arranged his authorship concert where passages of his oratorio "Mission of Jonah" were performed.

On the occasion of the centennial of Tobias's birth in 1973, a memorial museum was opened in Selja, Käina Parish in the house where he was born.