Ailsa holds a Bachelor of Dramatic Art in Design (NIDA). 

Recent design credits include The Marriage of Figaro (SOSA), The Dictionary of Lost Words (STCSA/STC – costume design), Lady Day (STCSA/MTC/Belvoir), The Goat, or Who is Sylvia? (STCSA/STC – costume design), Tracker (ADT – costume design), Girls and Boys (Sydney Festival/Adelaide Festival), A Christmas Carol and Boxing Day BBQ (Ensemble Theatre), Single Asian Female (STCSA), Chalkface (STCSA/STC), Watershed (Adelaide Festival) and Myth or the Go Between (Gravity and other Myths/Blue Soup Films). 

Slingsby credits include Songs for Those Who’ve Come Across the Seas, costume designs for The Boy Who Talked to Dogs, Emil and the Detectives, The Mouse, the Bird and the Sausage and Ode to Nonsense. 

Credits for State Theatre Company South Australia include Who’s Afraid of Virginia Woolf, Ripcord, Gaslight,  The 39 Steps, Jasper Jones, End of  the Rainbow, Creditors, Sense and Sensibility, Switzerland, The 39 Steps, Romeo and Juliet, Mendelssohn’s Dream,  Beckett Triptych, The Importance of Being Earnest, Hedda Gabler, In the Next Room or The Vibrator Play, War Mother, The Ham Funeral, The Complete Works of William Shakespeare (Abridged), The Price, The Cripple of Inishmaan,  Betrayal, A Doll’s House, Things I Know To Be True and Little Bird.