Meet the executive team
Jonathan Spear, Chief Executive Officer
Dr Jonathan Spear is Infrastructure Victoria’s Chief Executive Officer.
Previously the organisation’s Deputy Chief Executive, Chief Operating Officer and General Counsel, Jonathan has led Infrastructure Victoria’s work on Victoria’s 30-year infrastructure strategy, research program and provision of independent advice to the Victorian Government.
Before joining Infrastructure Victoria during its establishment in 2015, Jonathan held senior leadership, policy, strategy and legal roles with the Victorian Government Department of Premier and Cabinet, Department of Justice, Victoria Police and Slater and Gordon Lawyers.
Jonathan holds a Doctor of Philosophy in History, Executive Master of Public Administration, Master of Laws, Bachelor of Laws (Honours) and Bachelor of Arts (Honours). He is also a legal practitioner, a graduate of the Australian Institute of Company Directors and the Williamson Community Leadership Program, and a director of the Melbourne Forum.
Allison Stewart, Deputy Chief Executive Officer
Dr Allison Stewart is Infrastructure Victoria’s Deputy CEO.
Allison is an experienced capital projects leader, strategist, academic and management consultant specialising in infrastructure and energy. She has worked as an industry practitioner, academic, consultant, and civil servant in jurisdictions around the world including Tanzania, Canada, and the United Kingdom.
Prior to joining Infrastructure Victoria, Allison was an executive at the Suburban Rail Loop Authority, Victoria’s largest integrated land use and transport project. She also previously led Infrastructure Victoria’s research into the infrastructure required to enable automated and zero emissions vehicles.
Allison holds Doctor of Philosophy in Management and Master of Science degrees from the University of Oxford, and a Bachelor of Commerce degree from McGill University. She is also a graduate of the Australian Institute of Company Directors.
Mandy Frostick, Executive Director Communications and Engagement 
Mandy Frostick leads Infrastructure Victoria’s communications and engagement functions including strategic counsel, stakeholder relations, community engagement, media relations, brand and digital activity.
Mandy has extensive consulting experience across a broad range of industry sectors including health, energy, resources, finance, technology and government. She has also held senior leadership positions with some of Victoria’s best known organisations including WorkSafe, City of Melbourne, the Royal Women’s Hospital and BHP.
Mandy is a graduate member of the Australian Institute of Company Directors and a non-executive director of the Royal Women’s Hospital.
Llewellyn Reynders, Director Research and Policy
Llewellyn Reynders leads Infrastructure Victoria’s Research and Economics team, specialising and carrying out research in areas such as urban productivity, social equity and the impact of climate change on infrastructure.
Llewellyn joined Infrastructure Victoria in 2019 as the Manager, Strategy and Policy, coordinating the development of recommendations for projects, policies and reforms and the delivery of Victoria’s infrastructure strategy 2021–2051. The state’s second integrated, cross-sectoral infrastructure strategy was tabled in the Victorian Parliament in August 2021.
Llewellyn was previously policy manager at the Victorian Council of Social Service, where he advocated for reducing poverty in Victoria, and has held leadership and policy roles in other government and not-for-profit organisations. He has a Master of Social Policy from the University of Melbourne, and a Bachelor of Economics and Bachelor of Science from the Australian National University.
Peter Kartsidimas, Director Research and Policy
As Director Networks and Planning, Peter plays a key role in the delivery of complex and expert advice across a range of infrastructure matters, including transport, land use and infrastructure planning. Prior to joining Infrastructure Victoria in mid-2021, Peter was the Senior Manager Transport, Planning and Infrastructure at RACV, where he was responsible for a variety of public policy and advocacy activities.
Peter has more than two decades’ experience working across the public and private sectors in the planning and design of infrastructure projects, mostly in the transport sector. This includes working interstate and internationally, in the United Kingdom, on several urban centre regeneration projects, with a focus on sustainable modes of transport.
Peter holds a Bachelor of Engineering (Civil), and has served as a volunteer on several organisations, including as AITPM WA State President and the National Chair of the Transport Modelling Network. He is also the current Chair of the Cycling and Walking Australia New Zealand (CWANZ) Design Innovations Working Group.
Victoria Thaine, Director Corporate & People and Culture
Victoria Thaine is Infrastructure Victoria’s Director Corporate & People and Culture, leading the delivery of operational functions, including procurement, budgeting and governance. She is also responsible for designing and implementing key organisational culture initiatives.
Prior to joining Infrastructure Victoria during its establishment in 2015, Victoria worked across a variety of government agencies, including in large departments, central agencies and private ministerial offices.
Victoria is an accredited organisational coach and holds a Graduate Certificate in Business Administration.