Harrison is a PhD researcher in the School of Chemical, Materials, and Biological Engineering at the University of Sheffield. He is supervised by Dr. Brant Walkley and is a part of the Sustainable Materials at Sheffield (SMASH) research group.

His research focuses on furthering the understanding of the fluid-particle and particle-particle dynamics underpinning the use of limestone calcined clay cements with a focus on their use in the disposal of nuclear waste. This work aims to provide a low-carbon alternative for the encapsulation of problematic radioactive wastes. Harrison's research is funded by an EPSRC scholarship and is part of the SATURN (Skills And Training Underpinning a Renaissance in Nuclear) CDT, a consortium training the next generation of nuclear scientists and engineers. Harrison obtained his master's degree in Chemical Engineering with Nuclear Technology at the University of Sheffield where he developed a passion for the disposal of nuclear waste and enabling more sustainable practices within the nuclear industry.