Who we are


Sue Paul


Sue Paul leads our audit and assurance work. She has particular expertise in operational audits and reviews, business process performance improvement, and certification of market software.

Ms Paul has carried out energy market audit projects in New Zealand, Australia, the Philippines and the United States. She has led operational and software audits for the Independent Australian Energy Market Operator of Western Australia, the Australian Energy Market Operator, the Philippine Electricity Market Corporation (PEMC) and Transpower New Zealand.

Ms Paul also advises on the design and implementation of energy markets, advanced modelling and forecasting techniques, and how to better design and manage business processes to mitigate risk.

Richard Bowmaker


Richard Bowmaker leads our quantitative analysis work. He draws upon a background in electrical engineering and extensive software development experience as a specialist in the development, application and testing of energy market models and systems.

Mr Bowmaker has provided analytical support for energy sector asset transactions in Australia, USA, UK, France, Singapore, Malaysia, the Philippines, India, Panama, and the Gulf, and has tested gas and electricity market software in New Zealand, Australia, the Philippines, USA and Canada.

Mr Bowmaker also advises on engineering and IT security matters.

Tim Robinson


Combining a broad technology background with a deep knowledge of energy markets, Tim Robinson leads our work on energy market systems, IT practices for critical infrastructure providers, and responses to emerging technology.

Mr Robinson has advised private and public sector clients in six continents on a range of issues including all aspects of market system design, implementation and operations. He has worked with market systems in New Zealand, Australia, USA, Singapore, the Philippines and South Africa.

Mr Robinson also leads market assurance engagements, and advises on wholesale and retail market design, implementation and strategy, market power mitigation, renewable energy, and qualitative and quantitative analysis of energy asset investment decisions.


Isaac Gumbrell

Isaac Gumbrell

Isaac Gumbrell is an energy economist specialising in energy market modelling and economic analysis. He also has experience in market software certification.

Before joining RBP, Mr Gumbrell was with the Energy Research Centre at the University of Auckland, where he lectured and tutored in energy economics and climate. His masters thesis used an agent-based model to predict electricity costs for energy storage in New Zealand in 2050, including modelling the impact of the proposed Onslow pumped hydro project.

Ajith Viswanath Sreenivasan

Ajith Viswanath Sreenivasan

Ajith Viswanath Sreenivasan is an Analyst at RBP specializing in energy market analytics.

Before joining RBP, Mr Sreenivasan worked at an energy services firm, helping energy intensive customers reduce cost and improve efficiency. This role involved continuous monitoring of consumption patterns, identifying improvement opportunities, developing implementation plans and building prediction models to forecast energy usage and savings.

Mr Sreenivasan’s academic work included building a detailed TIMES model of the New Zealand energy sector, and his master thesis explored methodologies to establish the optimal charging pattern for electric vehicles and identify their impact on the New Zealand grid.


Alastair Duffy

Alastair Duffy

Alastair Duffy has 20 years of consulting experience for clients around Asia Pacific, North America, and around the globe. His specialisations include electricity market design, energy market modelling, and audit and certification of electricity market software and systems. His clients have included system and market operators, energy regulators, government agencies, utilities, independent power producers, investment funds, renewable developers, and banks.

In recent years, Mr Duffy has had a strong focus on the Philippine electricity market, providing expert advice, analysis, and market modelling to numerous local and international companies.

Steve Wightman


Steve Wightman specialises in providing strategic advice to the energy industry. He has advised a range of international clients on market reform and restructuring, corporate finance, mergers and acquisitions, strategic management and utility regulatory issues. He has also undertaken a variety of commercial and regulatory work including valuations of generation and co-generation projects, valuations of distribution and transmission assets, electricity market studies, managing and negotiating the purchase and sale of generation and fuel assets and in the determination of pricing for energy utilities.

Ian O'Donoghue

Ian (1)

Ian O’Donoghue is an expert in modelling and analysis. He has 30 years’ experience leading and delivering modelling projects, including 15 years in the energy sector. His energy work has included modelling of prices, demand, and generation capacity, energy sector deregulation policy, design and implementation of wholesale and retail markets, analysis of renewable energy policy, and analysis of generation and transmission investment decisions. He has a particular interest in best practice spreadsheet design.