 At the time of Russian Revolution of 1917, Mashkov was employed by the City of Moscow as deputy to City Architect.Bolshevik administration retained him in his office, and for some time Mashkov acted as the City Architect, engaged mostly in maintenance of the city in the middle of a civil war.In 1929, Mashkov and sculptor Nikolay Andreyev erected the neoclassical monument to Aleksandr Ostrovsky near Maly Theater.