His research focussed on many problems in engineering with a persistent interest in the lifetime performance of structures in hostile environments under dynamic and repeated loading ... [including] research into load spectrums, fatigue and fracture, incremental collapse, risk assessment and life extension applied to cranes, bridges, ships (bulk carriers) and offshore structures with wrought iron, steel, concrete, composite and FRP materials.
[3] In his work at Monash he helped to launch the Off-shore Engineering Program and established the national group ACADS (the Association for Computer Aided Design) in 1972 to help professionals develop computing skills and set standards for software in engineering applications.
[4] He was also involved in development of a software package BRAWIM for detailed modelling of load effects on highway bridges derived from weigh-in-motion data, which was used to assist in establishing fatigue loading rules for the Austroads Bridge Design Code AS5100.
[10] Other positions included: Following retirement, Grundy used his reputation and technical knowledge to assist with and to disseminate information about disaster mitigation and relief in developing countries.
His funeral service was held at St Thomas the Apostle Church, Blackburn and he was buried at Lilydale Memorial Park on Friday 11 January 2013.