Despite protest from his supervisor and university rector Ernst Orlich, the Nazis forced Ollendorff to resign in 1933.

Ollendorff returned to Germany in the following year to organize the transfer of Jewish children to Mandatory Palestine within the framework of the newly established Youth Aliyah.

In 1939, he joined the staff of the Haifa Technion and founded the faculty of electrical engineering in which he was professor.

His interest in the education of teenagers made him a keen supporter of the Technion's vocational high school.

[1] A plaque commemorating Orlich's courage hangs in the Physics department at the Technion.