 On 23 September 1879 he was promoted to Premierleutnant.1887 followed a promotion to Hauptmann, and in 1894 he was made a Major and assigned as battalion-commander in the 2nd Guards Infantry.In 1901 von Quast was promoted to Oberstleutnant and assigned to the staff of 1st ("Emperor Alexander") Guards Grenadiers before becoming commander of his old 2nd Guards Grenadiers with the rank of Oberst on 18 April 1903.