
Navigating Sustainability 2025
Monthly Leaders Forum at the Greenhouse Climate Tech Hub Sydney
12-2pm
An open forum to challenge your thinking, open new possibilities and connect with leaders

Venue
Greenhouse Climate Tech Hub, Salesforce Tower, Sydney
Series 1 – 5 Sessions 1st Tuesday – March to July
05
Electro-Retrofit – how to bring B-grade buildings into the A-league
1 July 2025
12 pm to 5 pm, Greenhouse, Salesforce Tower, Sydney (and streamed)
Summit – 12 pm to 5.30 pm
Future-proofing your assets isn’t optional – it’s essential. With tenants demanding lower emissions and higher performance, and investors rewarding buildings that deliver, the case for electrification has never been stronger.
Join the Electro-Retrofit Masterclass to unlock the proven strategies behind some of Australia’s highest-performing buildings – 101 Collins Street and 111 Bourke Street, Melbourne, and 121 Castlereagh Street, Sydney.
Learn how electrification and smart retrofits are driving better NABERS and Green Star ratings, slashing energy use, and elevating asset value.
Whether you’re a building owner, architect, engineer, facilities manager, sustainability manager or mechanical contractor.
Don’t let your buildings fall behind. Step up to the A-League. Book your spot now and earn CPD points.
Past events
04
Post election special – Show me the Green Money – where to find the best opportunities in green business
3 June 2025
12 pm to 2.15 pm, Greenhouse, Salesforce Tower, Sydney (and streamed)
Experts and audience participation to discover the opportunities and challenges:
Jeremy Gill, Committee for Sydney on the national opportunities for green jobs and investment, Frankie Muskovic, Property Council of Australia on the policy landscape post election; Richard Smith, MBM on the coming social and affordable housing boom; Ali Ingram, JLL on the capital market flows and what they mean for real estate investors – with a special focus on renewable energy, data centres, defence and more.
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03
Blue Zones & how to make them
6 May 2025
Blue Zones are where people live happy healthy lives to 100 and beyond. What’s the secret? Partly it’s strong social connections and now lonelygenics is the science that studies how urban planning and the built environment can unlock massive benefits. Whether at work or home.
There’s more: the experts say we can provide contact with nature or social spaces but it’s another thing to encourage people to use those resources.
Meet the speakers

Professor Xiaoqi Feng
Professor of Urban Health and Environment
UNSW
Bio
Professor Xiaoqi Feng is the Professor of Urban Health and Environment in UNSW’s Faculty of Medicine and Health and an Honorary Professorial Fellow at the George Institute for Global Health, Australia.
Xiao is a top-ranked researcher in cities and health, leading research programs informing urban planning strategies that improve cities and health sustainably and equitably for millions of people. She is the Founding Co-Director of the Population Wellbeing and Environment Research Lab (PowerLab) and the Chair of Equity, Diversity, and Inclusion (EDI) Committee in her faculty as well as the Chair of the International Society for Environmental Epidemiology’s Capacity Building and Education Committee. Xiao coined the term “lonelygenics” which will be explored in the event.

Kellie Payne
Architect and Director
Bates Smart
Bio
Kellie Payne approaches architecture with a simple but profound belief: it must serve the people who live within it, the places it inhabits, and the planet it touches. With over 30 years of experience, her work is rooted in a deep understanding of how people move through and connect with space, whether at the intimate, human scale or within the broader skyline of a city. Kellie helps lead Bates Smart’s sustainability team that focuses on how architects and designers can make places that are high performance, socially equitable and economically durable. This includes working with clients to prioritise sustainability efforts across all project phases, from premises selection through to final delivery. Key recent clients include Charter Hall, Lendlease and Commonwealth Bank of Australia—organisations all intent on creating a better built environment.

Petie Walker
Executive General Manager, Sustainability & Delivery
Stockland
Bio
Petie has over 25 years’ experience in the property sector across Australia and Asia, with expertise in project delivery, as well as corporate operational and strategic leadership and governance across design, construction, development and asset management.??She joined Stockland in 2017 and is the Executive General Manager of Sustainability and Delivery, with responsibility for sustainability, First Nations, strategic procurement, design and project management functions.? Petie is a non-executive director of community housing provider, Homes North, and a member of the Smart Cities Advisory Board at Macquarie University in Sydney. She holds a Graduate Certificate in Change Management from AGSM, a Bachelor of Applied Science in Construction Management from the Queensland University of Technology and is a Graduate of the AICD Company Directors course.

Gabrielle McMillan
Chief Executive
Equiem
Bio
Gabrielle McMillan is the co-founder and CEO of Equiem, a global leader in tenant experience technology for commercial real estate. Since launching the company in Melbourne in 2011, she has grown Equiem into a platform used by over 300,000 people across more than 120 million square feet of office space worldwide, with operations spanning Australia, the UK, Europe, and the USA.
Under Gabrielle’s leadership, Equiem has transformed the way landlords and property managers engage with tenants, turning office buildings into vibrant, connected communities. The platform offers a suite of tools that enhance tenant satisfaction and streamline building operations, including communication channels, amenity bookings, and data analytics. Equiem’s innovative approach has been recognized with numerous industry accolades, and Gabrielle herself has been honored in Business Insider’s “Coolest People in Australian Tech” and Bisnow’s “NYC Power Women” list.
02
Building/unbuilding – what construction needs now
1 April 2025
Construction productivity is appalling. We know. But the Productivity Commission report in February said it was not only the worst of any industry, it’s gone backwards. There’s also a housing crisis, and now a lot of hope riding on new methods of construction (MMC) or pre-fab to solve both these problems. Alongside this is the urgent need for circularity and the electrification of buildings.
What we need now is brilliant.
At this event, you’ll hear three of the best speakers in Australia and globally as they open up the possibilities emerging from the combination of technology, better business models, and sheer imagination. Not to mention the powers of persuasion.
Lasse Lind’s companies Danish-based GXN and 3XN specialize in circular design (designing for disassembly), behavioural design (how people interact with buildings), and technology to push innovation to make buildings more sustainable. GXN designed Circle House in Denmark, where “90 per cent of its building materials are intended for future re-use”. It’s critical, he says, to embrace the unloved older buildings that are so valuable for their embodied carbon. In Sydney, 3XN has designed the Quay Quarter and the Sydney Fish Markets, hailed as the next global icon following that other Danish-designed icon, the Sydney Opera House.
Karl-Heinz Weiss is Lendlease’s former guru on MMC. He is one of the handful of insiders in Australia who can unpack this complex but promising innovation. It can open the doors to alternative, more sustainable materials and maybe help our housing crisis resolve. Weiss says it’s not technology that has stood in the way of a successful MMC; it is the business model. He’s now consulting on a new MMC factory in Orange, NSW, that brings back to life the mothballed kit from Lendlease’s former DesignMake factory in Western Sydney.
Ross Harding of Finding Infinity blends his engineering skills with the force of his prodigious imagination and ability to cultivate motivation across an extraordinarily diverse group of people in the built environment to generate concepts and projects that offer templates for a massive step change in sustainability for buildings and cities.
Maria Atkinson, our moderator, is one of Australia’s most respected green building and sustainability experts. She’s a board director of several companies and NSW Net Zero Commissioner.
01
Green investment, politics and policies in a year of radical change
4 March – Recording now available to members only – SIGN UP NOW, send a note to members@thefifthestate.com.au
This is a year that’s already like no other.
The backlash to climate and sustainability investment started with the roiling disruption of new Trump administration in the US.
Will it last or is it bluff and bluster? Will the weight of money already invested in the climate tech and sustainability prevail?
This first session brings you two of the most highly regarded participants in the green investment and government policy arena – Martijn Wilder, Founder of Pollination and Matt Kean, Chair of the Climate Change Authority.
Moderator Rachel Alembakis is one of the best interrogators in green investment journalism and now a participant in the sector.
Meet the speakers

Martijn Wilder
Founder
Pollination
Bio
Martijn Wilder is Founder and CEO of Pollination. He is the chair of the Australian government’s National Reconstruction Fund Corporation (NRFC), and chair of the Governing Board of the Renewable Energy and Energy Efficiency Partnership (REEEP) based in Vienna. He is also an Adjunct Professor of International Climate Change Law at Australian National University, a Senior Advisor to Serendipity Capital, and a Member of the Wentworth Group of Concerned Scientists.
Martijn was previously head of Baker & McKenzie’s global climate law and finance practice for twenty years and played a key role with Australia’s clean energy finance institutions. He was previously President of WWF-Australia, Chair of the Australian Renewable Energy Agency (ARENA), a former founding director of the Clean Energy Finance Corporation, and he helped to establish and later Chair the federal government’s Low Carbon Australia finance body. He was also Chair of the Victorian Government’s independent expert panel on Victoria’s 2035 Climate Change target. Martijn was a Cambridge Commonwealth Trust Scholar and was awarded an Australian Honour (AM) for his contribution to climate change law and the environment.

Matt Kean
Chair
Climate Change Authority
Bio
Matt Kean was appointed as Chair of the authority on 5 August 2024 for a term of 5 years. He was previously the Member for Hornsby in the NSW Parliament from 2011 until 2 August 2024.
Kean was most recently the NSW Shadow Minister for Health. He was Deputy Leader of the NSW Liberal party from August 2022 until March 2023. Throughout his 13-year political career, Kean also held ministries of Innovation and Better Regulation, Treasury, Energy and Environment.
As Treasurer and Energy Minister of NSW, Kean championed climate action that is in the best interests of households and businesses. In 2020, he delivered the Electricity Infrastructure Roadmap: A 20-year plan for NSW’s energy infrastructure. The roadmap spurs private investment in renewable energy while reducing emissions and power bills for the people of NSW.

Rachel Alembakis
U Ethical Investors
Moderator
Bio
Rachel Alembakis is stewardship manager at U Ethical Investors. In her role, she is responsible for managing U Ethical’s active ownership activities. She is a member of the board of directors of the Responsible Investment Association of Australasia (RIAA). She was previously the managing editor and founder of FS Sustainability, a trade publication title that examines how investors and companies integrate environmental, social and corporate governance issues into their decision-making processes and host of the ESG podcast The Greener Way. She has more than a decade’s experience as a financial journalist covering a broad range of investment issues. Rachel holds an MSc in Politics of the World Economy from the London School of Economics and Political Science, a BA in journalism and a BS in political science from Boston University.
