Teymourtash served as the Governor of Gilan from 1919–1920. His Governorship of Gilan was to prove particularly noteworthy given the reality that his primary mandate was to counter secessionist forces in that province led by Mirza Kuchak Khan who received assistance from the new Bolshevik Government in the neighbouring Soviet Union. Teymourtash's term as Governor of Gilan was to prove short-lived, lasting less than a year, after which he was recalled to the capital without the balance of power between central government forces and those of the Soviet-backed insurgents having shifted in any particular direction. Some Iranian historians have accused Teymourtash of having used undue force in resisting the secessionists, but records that could corroborate such an account have not been presented. He may have been appointed civilian governor, but at the same time a Cossack officer, Starosselsky, had been appointed military governor with unfettered powers to quell the jangali successionist movement. In fact, Mirza Kuchak Khan's followers put on trial during Teymourtash's term were court martialed by a five-member tribunal consisting entirely of Cossack officers.