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Dr Timothy Ramjaun

Dr Timothy Ramjaun

Research Associate

+44 (0)29 2068 8547
Room C09, Aberconway Building, Colum Road, Cathays, Cardiff, CF10 3EU


Dr Tim Ramjaun is a Research Associate in Logistics & Operations Management at Cardiff Business School, investigating circular economy strategies to enable repurposing through product transformation and connected collaboration. This is a Smart Expertise Project supported by the Welsh Government and Welsh European Funding Office.

Returning to academia as a mature student, Tim completed his PhD at the University of Cambridge and continued as a researcher sponsored by BP. He joined Cardiff University in 2017 as part of the ASTUTE project, delivering collaborative research projects with industrial partners specifically in the domain of supply chain management, resilience and strategy. Following a transition to the Business School, his first project involved researching and developing collaborations within the Welsh food & beverage sector as part of the Co-Growth programme.

Tim has previously worked as a project engineer for Jaguar Land Rover at their product development and manufacturing facilities in the Midlands. He then moved into a procurement role for a company that designs and manufactures landscaping equipment with the remit of re-engineering the global supply chain to reduce risk while improving cost, quality and schedule adherence.


A PhD qualified researcher with broad exposure to educational and professional environments. Demonstrating a balance of academic, technical and commercial skills gained through employment in higher education, procurement, and manufacturing operations. Currently investigating repurposing as a circular economy strategy at Cardiff Business School to stimulate innovation and cross supply chain collaboration among businesses. Previously responsible for managing industrial projects and delivering SC/operations solutions in the manufacturing sector. Doctorate completed at the University of Cambridge, other positions include project engineer at Jaguar Land Rover and supply chain specialist at Hayter/Toro. I am motivated by excellence and committed to continued professional development.


  • Associate Fellowship of HEA
  • Online Teaching: creating courses for adult learners – The Open University
  • Creating and delivering guest lectures (MSc – Risk Management in Supply Chains).
  • Tutorial classes (MSc – Supply Chain Strategy).
  • Supervising undergraduate industrial project (BEng – Manufacturing Systems).

Enabling Repurposing - Product Transformation and Connected Collaboration

This current research project explores the value of repurposing products and components in secondary applications through business collaboration, and its contribution to the circular economy. The project aims to reduce material and carbon footprints while creating new value streams across supply chains.

The traditional linear, make-use-dispose way of thinking is giving way to a revolutionary circular, make-use-reuse model. New legislation is no longer instigating slow change but pushing firms to radically reduce their carbon emissions (net-zero targets).

Repurposing is a circular economy strategy that adapts end-of-life products for use in different applications and markets. Its goal is to retain or add value (up-cycling) rather than simply recycle at a material level (down-cycling). Some examples include conversion of clothing to carpet tiles, airline seats to bags and wind turbines to bike sheds!

Research Interests:

  • Supply Chain Management
  • Operations Management
  • Circular Economy
  • Manufacturing Systems
  • Resilient Supply Networks


  • Ramjaun, T. I., Sanchez V. S., & Kumar, M. (2022) Horizontal supply chain collaboration amongst SMEs: insights from the UK brewing sector. Production Planning & Control.
  • Mohammed, A., Harris, I., Soroka, A., Naim, M., Ramjaun, T., & Yazdani, M. (2020). Gresilient supplier assessment and order allocation planning. Annals of Operations Research, 1-28.
  • Ramjaun, T. I., Ooi, S. W., Morana, R., & Bhadeshia, H. K. D. H. (2018). Designing steel to resist hydrogen embrittlement: Part 1–trapping capacity. Materials Science and Technology, 34(14), 1737-1746.
  • Ooi, S. W., Ramjaun, T. I., Hulme-Smith, C., Morana, R., Drakopoulos, M., & Bhadeshia, H. K. D. H. (2018). Designing steel to resist hydrogen embrittlement Part 2–precipitate characterisation. Materials Science and Technology, 34(14), 1747-1758.
  • Ramjaun, T., Stone, H. J., Karlsson, L., Kelleher, J., Moat, R. J., Kornmeier, J. R., Dalaei, K., & Bhadeshia, H. K. D. H. (2014). Effect of interpass temperature on residual stresses in multipass welds produced using low transformation temperature filler alloy. Science and Technology of Welding and Joining, 19(1), 44-51.
  • Ramjaun, T. I., Stone, H. J., Karlsson, L., Kelleher, J., Ooi, S. W., Dalaei, K., Rebelo Kornmeier, J., & Bhadeshia, H. K. D. H. (2014). Effects of dilution and baseplate strength on stress distributions in multipass welds deposited using low transformation temperature filler alloys. Science and Technology of Welding and joining, 19(6), 461-467.
  • Ramjaun, T. I., Stone, H. J., Karlsson, L., Gharghouri, M. A., Dalaei, K., Moat, R. J., & Bhadeshia, H. K. D. H. (2014). Surface residual stresses in multipass welds produced using low transformation temperature filler alloys. Science and Technology of Welding and Joining, 19(7), 623-630.
  • Ooi, S. W., Garnham, J. E., & Ramjaun, T. I. (2014). Low transformation temperature weld filler for tensile residual stress reduction. Materials & Design (1980-2015), 56, 773-781.


Past projects