A Calibre Group Company

Diona is a member company of the Calibre Group.

With offices across the Asia Pacific region, Calibre is a trusted partner within the resources, urban, technologies, defence, transport and infrastructure markets, bringing together diversified engineering, advisory, project delivery, construction and asset management services. Turning knowledge into value, we deliver positive economic and social outcomes for our clients and the communities in which we work and live.

The Calibre businesses thrive on continually meeting and exceeding the highest standards of corporate governance and business conduct across the board.