Frater resumed his earlier position with Brooks, Robinson, then was employed by E. L. Yencken & Co. Pty Ltd to design the west window of Wesley Church, Lonsdale Street, Melbourne, which he regarded as his most significant design, and other commissions including windows of Kyabram Wesley Evangelical Methodist Church, St Stephen's Angligan Heritage Church, Wynyard, Tasmana and Birregurra Christ Church.