He became a lecturer at the Musikhochschule Berlin in 1929, but his career was interrupted during the Nazi regime.

[2] He was dismissed in 1933, at the instigation of the Kampfbund für deutsche Kultur under the Nazi regime.

[1] When the Nuremberg Laws of 1935 were enacted, he also lost his German citizenship which had been granted to him in 1925.

[1] After World War II, Borris returned to the Musikhochschule in Berlin, where he was appointed professor.

He became a member of the advisory board of the broadcaster Sender Freies Berlin.

[2][5] His works and personal documents are held by the Academy of Arts, Berlin.