- "Whether helping Council to design a $4.5 million stormwater scheme or preparing standard drawings, policies or DCPs, Mark is thorough, innovative, professional and a good collaborator. I would not hesitate to recommend him for work on other projects” – Tony Napoli, Manager Asset Design, Blacktown City Council.
- “Sustainability Workshop developed an innovative strategy to ensure Borgs will continue to meet its tough water quality licence conditions. Sustainability Workshop punches above its weight and we would recommend them to other developers over “tier one firms” – Victor Bendevski, Environmental and Regulatory Compliance.”
- “We engaged Mark on my brother’s recommendation. Mark prepared a short report and stormwater plan to address Council’s requirements. We received a quick response and a simple solution. He listened closely to what we needed. I would recommend Sustainability Workshop to any prospective home builder.” – Nelson Clark, Wentworth Falls