Evison first began acting while studying an arts degree at Victoria University, performing in radio plays recorded onto acetate discs. Following her return to New Zealand from London, she began acting in television roles, with a small role in the television play All Earth to Love, and guest appearances and a regular role on the sketch comedy series In View of the Circumstances.
In 1971, Evison starred in the television drama serial Pukemanu as storekeeper Phyllis Telford, a role written specially for her by series creator Julian Dickon. In her 1998 autobiography Happy Days in Muckle Flugga, Evison stated that the role as Mrs Telford changed her life, and she was thereafter recognised throughout New Zealand as "Mrs Pukemanu".[4] Evison also starred in the first production at Palmerston North's Centrepoint Theatre in 1973, An Evening With Katherine Mansfield.[5]