Greyburn Building Contractors is a company that came to fruition in 1987 in Melbourne through Michael Byrne and Graeme Ballinger refurbishing office buildings and expanded into general tendering, industrial, commercial, retail and residential projects. John Kearney started working with Greyburn in 2011 and became the sole director and shareholder in 2014 before welcoming Aaron Hook as a co-director in 2021.

​Greyburn is and will continue to be a nimble and dynamic company that adapts to the ever-changing construction market whilst retaining a consistent team of highly skilled construction specialists.