Soina joined (UDA) as her first party. She contested on Member of Parliament position. She represented North Kajiado, Kenya in the 13th Parliament of Kenya. Later, on 24 March 2022, she left UDA to join "Green Thinking Action Party" (GTAP). She represented the same position. She moved to GTAP because the party decided to remove nomination fee for women aspirant who join the election in the party.