Trussler made her county debut in 2021, for Hampshire against Middlesex in the Women's Twenty20 Cup.[3] She went on to be the leading wicket-taker across the whole tournament, taking 16 wickets in her 6 matches at an average of 6.50.[4] In her third match of the tournament, she took her Twenty20 best bowling figures, of 4/12 against Sussex.[5] She played three matches in the 2022 Women's Twenty20 Cup, taking one wicket.[6] She joined Oxfordshire for the South Central Counties Cup, a 50-over tournament involving the counties in the South of England.[7] She took 2/15 from her 7 overs in the opening match of the tournament.[8] She played eight matches for Hampshire in the 2023 Women's Twenty20 Cup, scoring 111 runs and taking 10 wickets at an average of 8.70.[9][10]
Trussler was named in the Southern Vipers squad for the 2021 season, but did not play a match.[11] She was not initially named in the side's squad for the 2022 season, but was first named in a matchday squad for the Vipers' match against Lightning on 16 July.[12] She made her debut for the side on 17 September 2022, against Northern Diamonds in the Rachael Heyhoe Flint Trophy, taking 2/56 from her 10 overs.[13] She played one more match for Vipers that season, against South East Stars in the Rachael Heyhoe Flint Trophy play-off, taking 2/12 from her 6.2 overs.[14] She was again in the Southern Vipers squad for the 2023 and 2024 seasons, but did not play a match.[15]
Trussler was released by the Vipers when her contract expired at the end of the 2024 season[16] and joined Middlesex the following year.[17]