Dr Kaewunruen has extensive experience in the field of structural, civil and railway track engineering both in industry and in academia. With over decades in industry and regulatory environments, he has wide variety of specialisations, including rail engineering, track engineering, track components, structural and geotechnical engineering, maintenance and construction. He has research and practical experience internationally in railway systems and infrastructure engineering. His work has involved many industry projects worth over £5b and supervised/participated in railway research projects worth over £8m (in Australia, UK, Japan, USA, Sweden, China, Malaysia and Thailand). He published significantly in this field in terms of both academic work and evidence-based governmental/authoritative technical reports. He has membership in EU-Cost Actions: TU1404 (Towards the next generation of standards for service life of cement-based materials and structures), CA15125 (Designs for noise reducing materials and structures), CA15202 (Self-healing as preventive repair of concrete structures) and TU1409 (Mathematics for Industry Network). Zac is a member of ISO and BSI standard committees for railway sleepers and recycling of rolling stocks. He successfully coordinates EU-funded RISEN (www.risen2rail.eu). He is also a committee member of Concrete Society West Midlands and is Chief Editor of Frontiers in Transportation and Transit Systems.

His research focusses are railway infrastructure, advanced/sustainable materials, structural engineering and dynamics, transportation systems, risks and strategy, operations and reliability engineering.