It would be great if you could add Australian Green Solutions to your list. Australian Green Solutions offers consultancy advice to organisations as well as working with clients to develop Sustainability Education and Green Skills training.
Consultancy and Education Programs include:-
Sustainability Awareness/Risk Analysis
Sustainability Measurement
Sustainability Strategy Development
Sustainability Implementation and Behaviour Change
Sustainability Monitoring

The key Sustainability focus of Australian Green Solution’s programs is on Education, Innovation and Collaboration

Much appreciated
Yvette

A great resource you have here and its great to see so many companies with a Sustainability focus.

I would recommend adding NACC Sustainability to the list as they offer sustainability consulting as one of their main focuses and the great work Howard Nielsen has done is widely acknowledged.

Regards
Scott

MJC Sustainability is an international network of professional and technical advisors partnering with clients to create sustainable business solutions.

We do this by developing a unique business case for sustainability in client organisations and then bring the right skills, systems and technologies to achieve the desired outcomes.

Founded in 2010, our head office is in Brisbane, with a network of associates operating across Australia, Canada and the Middle East.

Our focus areas are corporate sustainability strategy, CSR, climate change response, life cycle assessment and verification, innovative facilitation, executive briefings and advice.

Thanks for compiling this great list! You might also like to add Banarra to your list: http://banarra.com/

Banarra is a Sydney-based sustainability consultancy with a broad range of expertise covering not only environmental but also social sustainability and ethics. Service offerings include :
• Sustainability Assurance
• Strategy and Planning
• Social & Human Rights Management
• Report Development
• Climate Change Management

We are constantly growing and always on the look out for new passionate team members that bring in energy and new perspectives. Any questions? Just give us a call.

Many thanks in advance!

Kind Regards,
Christiane

Sustainability consulting is a weird thing as everyone from technical consulting to legal firms try to tack that label onto their firm and it is quite difficult to determine what the boundaries of your list are.

A few more specialist firms that spring to mind from my previous research are:
1. Energetics
2. The Shaper Group
3. Energy Advice

Regards
Daniel