Conducting building thermal performance assessments as an ABSA accredited HERS assessor; providing advice on improving building thermal performance; providing performance and economic analysis of and specifying domestic solar power, water heating, and space conditioning systems; advising on sustainable material selection with respect to embodied energy, indoor air quality, resource depletion, and biodiversity loss impact; conducting home sustainability consultations; conducting home energy and water audits; Preparing and certifying stormwater drainage and rainwater harvesting designs for residential and small commercial developments; designing; conducting rain harvesting simulation (daily time step) for rainwater storage: conducting water balance model assessments for medium size residential and commercial developments; Preparing and presenting workshops on behalf of local governments on topics including rainwater harvesting and greywater re-use and solar power and household energy efficiency.