 Nyora kupfuurira kweiyi ndima - Hendrikson akaberekerwa mumhuri yevashandi, akapedza chikoro chepuraimari muna 1910 uye akaenda kunoshanda somudzidzi womucheki pamushini wokugadzira mapepa. Kusvikira muna 1918, akashanda muzvirimwa zvinoverengeka zvemaindasitiri, uye kubva muna 1914 kusvika muna 1918, akashanda semushandi wemakiyi pabasa rokuvaka ngoro paDvigatel. Nhengo yeEstonian Communist Party kubvira muna 1917, muna 1918, mauto eGermany paakapinda muTallinn, akaenda neRed Army mungarava yehondo kuHelsinki, achizvipira kujoina Baltic Fleet. Akashanda muKronstadt mungarava inonzi Respublika. Gare gare akarwa muhondo yeNarva muna 1918 uye Hondo yeEstonia yeRusunungukonokuda kweSoviet Union. Pashure pokunge rutivi rweEstonia rwawana, Hendrikson akaenda kuLeningrad. Politburo yeBaltic Fleet yakatumira Hendrikson muna 1921 kunodzidza paEstonian Labor Faculty muLeningrad. Akapedza kudzidza muna 1924. Mukati mezhizha aishanda somutakuri wengarava inotakura zvinhu, achifamba pakati peEngland, Germany, Sweden, neFinland. Akazopinda muLeningrads F. Engels National Institute of Economics, kwaakapedza kudzidza kubva kuDhipatimendi reIndasitiri muna 1929 uye akatumirwa kunoshanda sainjiniya kuLeningrad Chemistry Departments Planning Department. Kutenda kwakagadziridzwa muma1930 kuLakokraska, uye Hendrikson akagadzwa kutungamira dhipatimendi rekuronga hupfumi. 