He received his architectural education in Chicago. In 1994 he founded Field Consultants with Peter Brew. Field Consultants won the 2000 RAIA Victorian Architecture Medal & Harold Desbrowe Annear Award. In 2006, Markham, with Peter Steudle, a chemical engineer, initiated Tug workshop – a group of materials, engineering, historical and design experts focussed on unsustainable anti-environmentalism. Tug won the 2015 AIA Harold Desbrowe Annear Award. The work of Field & Tug has been published in Australia’s leading industry journals of record, Architecture Review (Australia) & Monument.