Whakaotihia te rerenga e whai ake nei: I te tau 1776, ko Tyszkiewicz he karere ki te Sejm mai i te Vilnius Voivodeship. a i te tau 1778 i hangaia ko te Marshal o te Sejm. I te tau 1782, he kaitautoko ia mo te Kaunihera Tuturu. I roto i te
Polish-Russian War of 1792, i runga i te hui o te 23 o Hurae, i tautoko ia i te urunga o te kingi ki te Targowica Confederation, ko tana tauira i whai ake i a Tyszkiewicz ano, ka noho hei Grand Marshal o Lithuania. I te wa o te Sejm o Grodno, i tohua ia hei kaikorero me te karere a Ruhia a Jacob Sievers, no reira i te 22 o Hurae 1793 i hainahia e ia te kirimana o te wehenga o te whenua ki a Ruhia, ana i te 25 o Hepetema ki Prussia, hei waahanga o te Tuarua o Poland. I te tau 1795, ko ia te kaiarahi o te roopu Lithuanian e whakahonore ana ki a Catherine II.