Professor Grieser is an outstanding physical chemist with demonstrated leadership in free radical chemistry, spectroscopy, colloid & surface science and in sonochemistry. In some 200 highly cited publications, he has established creative links that cross conventional boundaries to solve key questions in surfactant science and sonochemistry. His leadership and standing in research in chemistry has been acknowledged by his colleagues through the HG Smith Medal of the RACI and through his Honorary DSc from Upsalla University and by his invited plenary & keynote lectureships at international conferences. His basic science has generated novel applications being taken up by companies.