Oliver, who is originally from Auckland, worked at Garbstore in London and Casey Casey in Paris before launching his own brand, Singular Garments, in 2020. His designs — mostly shirts and jackets — lean towards the practical and durable and his clothes are designed to last a lifetime. Each element of Oliver's clothes is made by his own hand, from cutting the fabric to hand-sewing the buttonholes. His fabrics, using mostly vintage and antique cottons and linens, often between 50 and 150 years old, are sourced from markets around Paris. The age of the fabric adds both character and a sense of timelessness. Due to the nature of his production methods quantities are extremely limited and everything is made to order.