[1] Drews studied law at Göttingen where he was a member of the Corps Bremensia fraternity.
From 1902 to 1905 he was commissioner of the county of Oschersleben before joining the Kingdom of Prussia's Ministry of Interior.
In 1919, he was responsible for the overhaul of public administration in the then-new Free State of Prussia, and urged the creation of a rigidly organized state police force to supplement uncoordinated local police forces.
Under his presidency, the court generally upheld the principle of the Rule of Law after the takeover of German government by the Nazi party, though it also allowed a substantial extension of police rights.
Until his death in 1938, Drews was the repeated target of attacks by Nazi lawyers promoting the introduction of the Führer principle into public administration.