Andrew Richmond is a geostatistician with 30 years experience in resource evaluation, mining and geostatistical research. Andrew provides consulting services in the application of both routine and specialised geostatistical techniques in the field of mineral resource evaluation, mining geology and grade control. He has been involved in a wide variety of geostatistical studies on gold, silver, copper, lead-zinc, nickel (laterite and sulphide), tungsten, molybdenum, coal and uranium deposits, and has provided geostatistical support to several operating gold mines. He has used, and has expert knowledge of, many resource estimation techniques, including linear (eg ordinary kriging) and non-linear (eg indicator kriging) estimation and multi-variate conditional simulation methods. Andrew has developed several applied geostatistical agorithms, including for risk-based grade control and open pit optimisation, geometallurgical applications, and conditional simulation with unfolding and multiple correlated variables. He has presented several geostatistical short courses in Australia, South America and Europe.