In 1890, he completed his courses and started working on a PhD on "Amines and hydrazines of polymethylene series, methods of their preparation and transformation", which he defended in 1895.

Later (1893–1898), he taught special courses in organic chemistry at the Moscow University and the Alexander Military School.

[3] In 1901, Kischner was appointed full professor at Department of Organic Chemistry of the Tomsk Polytechnic University.

His work benefited from copious funding, but it was hindered by gangrene of his hands and feet that eventually brought him to disability.

In recognition of his achievements, he was awarded the Butlerov Prize (in 1893 and 1914) and elected as a regular (1929) and then honorary (1934) member of the Russian Academy of Sciences.