Who We Are
DEM (Aust) Pty Ltd is a Sydney-based design practice with extensive experience shaping cities, communities, and places across Australia and globally. Drawing upon decades of collective expertise, the firm is committed to delivering projects of exceptional quality that exemplify design excellence, operational efficiency, and lasting community value.
Our History
DEM evolved from one of Australia’s most enduring architectural practices. Founded in 1962 as Devine Erby Mazlin, the practice built a reputation over three decades for design excellence across a wide range of building types. In 1990, recognising that the best design outcomes come from integrated thinking, the business expanded to bring interior design and landscape architecture in-house.
In 1998, the practice restructured and relaunched as DEM (Aust) Pty Ltd, under a leadership team that continues to guide the business today. More than 60 years after its establishment, DEM has evolved into an internationally recognised, award-winning design practice, maintaining the same commitment to quality and design excellence that has always defined the company.
Delivering Excellence,
By Design
We are committed to delivering exceptional services that combine technical excellence with a client-focused approach. On every project, we strive to exceed expectations — ensuring our work delivers tangible value and lasting impact. From concept through to completion, DEM brings experience-led thinking and a collaborative mindset, delivering tailored solutions that respond to each client’s unique vision and requirements.
We specialise in urban design, architecture, interior design and landscape architecture — supported by expertise in 3D visualisation, visual impact assessment, wayfinding and signage, design management, and project management.
Our team delivers projects of all scales across multiple sectors including data centres, master planning, residential, workplaces, transport, education, and community wellbeing.
Defining Projects
Major technology hub and Australian headquarters for IBM, awarded the Australian Institute of Architects Merit Award for Outstanding Architecture in 1986.
IBM Headquarters, Pennant Hills, Sydney
1995
A landmark waterfront transformation, delivering a foreshore promenade along one of Sydney's most historically significant harbour edges.
Pyrmont Bay Waterfront, Sydney
2000
Groundbreaking co-location facility, the first of its kind in Australia and the largest data centre development in the Southern Hemisphere at the time of completion.
A pioneering ‘urban village’ that set the benchmark for planned residential communities in Sydney.
Visionary 500-hectare new town for a population of 120,000, designed to strengthen and diversify greater Ningbo.
The first project in Australia to be awarded both a 6 Star Green Star Education Design v1 and As Built v1 certified rating.
Over 25 years’ involvement in the development of the Macquarie University campus, delivering significant buildings, interiors and urban design infrastructure projects.
A bold reimagining of urban space, bringing together community, transport and nature into one vibrant civic green above a basement car park.
Purpose-designed, world-class facility that redefines Multiple Sclerosis care through specialist treatment, research and holistic support.