Fern Sutherland, born in New Plymouth, began her acting career as a lead artist in short films produced by the UNITEC Performing Arts School. She gained early experience in theatre, appearing in productions such as Silo Theatre's Ensemble Project 08 and the Auckland Theatre Company's plays. Transitioning to television, Sutherland took on roles in South Pacific Pictures productions, including appearances in shows like Go Girls and The Almighty Johnsons.

Sutherland's breakthrough came with her role in The Almighty Johnsons where her performance garnered critical acclaim and award nominations. Following this success, she secured a prominent role in the New Zealand television series The Brokenwood Mysteries, portraying a sharp and formal small-town detective. The show provided her with further exposure and established her as a notable figure in New Zealand television.

Outside of acting, Fern Sutherland divides her time between New Zealand and Thailand. In Thailand, she spends extended periods practising Muay Thai in Phuket, reflecting her dedication to both her career and personal interests beyond acting.