The chapter deals with the Turkic languages spoken in northern and southern Siberia. They constitute the Northeastern branch of the Turkic language family including Yakut and Dolgan in the North and Tuvan, Altay, Shor, Chulym, Dukhan, and a number of others in the South. A comprehensive account of the verb systems in their many facets is offered with the intention to give a comprehensive picture of the architecture of verbal morphology, its complexity, and the interdependence of the building blocks: verb classes, phase structures, word-building methods, actional modifications, aspect categories, and agreement morphology. The interpretation of a given verb form in an utterance results from the non-trivial interplay of all these levels. The authors make use of the typological framework presented for European languages in Johanson 2000a and 2023b, which provide a reference frame also for the description of Turkic grammaticalized categories in cross-linguistic perspectives. This enables a comparison of the Turkic categories to the categories of the contact Siberian languages.