28 August 2010 Because we've been endorsed by the City of Sydney council as specialist civil and structural engineers and the City of Ryde in the area of renewable energy, as preferred suppliers and installers of rainwater tanks, solar hot water and (photovoltaic) solar panels. What does this mean? Well, out of the many proposals considered by Council, we were assessed as having the most preferred credentials to ensure professional service and value for money for our clients.