In September 2015, Prof. Walker joined Newcastle University in the School of Mechanical and Systems Engineering. She was Degree Program Director for the MSc Renewable Energy Flexible Training Program (REFLEX) and MSc Renewable Energy and Enterprise Management (REEM) until 2017. In 2017, she became Director of Expertise for Infrastructure research and member of the School of Engineering Executive Board. In September 2019, Prof. Walker became Director of the Newcastle University Centre of Research Excellence for Energy, known as The Centre for Energy. In 2021, she was promoted to Professor. Her research continues to focus on renewable energy and energy efficiency in buildings, energy policy, energy resilience, and whole energy systems.