Delivering on the Promise of Energy Transformation

Two trusted global brands delivering total energy management and scalable solutions to position customers for success in the energy transition.

Why Calibrant Energy?

Calibrant Energy aligns solutions to your needs to accelerate your energy transition.

It was established in 2020 by two of the world’s most respected and innovative companies in energy technology and the energy transition, Macquarie’s Green Investment Group, Siemens Smart Infrastructure and Siemens Financial Services. Our deep industry experience, our leadership in the energy transition, and our commitment to delivering value to our customers is what sets us apart.

Every day new energy technologies are emerging that will further diversify our energy sources, drive new efficiencies, and bring positive societal benefits. Calibrant Energy was formed to deliver and manage these new energy technologies and serve as a partner to companies and institutions seeking long-term energy solutions that are built to achieve specific goals of performance, sustainability, flexibility and value.

Our Values

We adhere to our word

Credibility is key. We are committed to the energy transition and helping you achieve your goals.

We think like a customer

Clarity is king. When we focus on the customer and inhabit their perspective, all else will follow.

We show what’s possible

Real change takes courage. We have a vision for what the future can look like and the capacity and drive to make it real.

Our Team

Board of Directors

Chris joined Macquarie Capital’s infrastructure team in London in 2007 and over the last 11 years he has worked across advisory and investment in PPP, renewable energy projects and infrastructure M&A. Chris relocated from London to New York in early 2018 as Head of Green Energy for the Americas. Under Chris’ leadership the team has brought the 200 MW Canadian Breaks onshore windfarm to commercial operations, formed two new solar development partnerships with a development pipeline over 10 GW, and completed construction of the largest behind the meter battery project in North America. During his time in Europe Chris led deal teams investing into a range of sectors from solar and offshore wind, to waste to energy and biomass. The team invested more than €1.4 billion of balance sheet capital, primarily as equity, facilitating transactions in excess of €10 billion on behalf of its clients. Chris has a Masters in Civil Engineering from Imperial College and a Masters in Finance from INSEAD.

Greg Callman is a Senior Managing Director and Global Head of Energy Technology at Green Investment Group. Greg leads infrastructure development and growth equity investments across grid scale energy storage, distributed energy, fleet electrification, and retail energy. He brings 20 years of international experience as an operating executive, investor, consultant, and public servant.

Greg joined Macquarie from Tesla, where he led the growth of the company’s energy storage business and charging infrastructure programs in North America, Europe, and ANZ. Previously, Greg served at the US Department of Energy, with the Recovery Act Team and ARPA-E.

Greg began his career as an advisor to organizations investing in emerging markets and post-conflict countries. He holds an MA from the Johns Hopkins School of Advanced International Studies (SAIS) and was an interdisciplinary Echols Scholar at the University of Virginia. He is based in San Francisco.

Mathew is a Vice President and Development and Construction (D&C) Director at Macquarie Capital, where he is responsible for development and construction of the Green Investment Group’s renewable energy projects within the Americas. He joined Macquarie Capital from EDF Renewables, where he was Director of Pre-Construction and played a vital role in the utility scale business with involvement in over 4 GWs of renewable energy projects from early-stage development to project completion and energy generation. He has experience in a wide range of energy technologies, both domestic and abroad, including coal fire, Combined Cycle Gas Turbine, Combined Heat and Power, biomass, biogas, battery storage, wind, pumped storage and distributed energy.

Mathew holds a BS in Mechanical Engineering from Georgia Institute of Technology.

John leads the Energy & Performance Services business for Siemens Smart Infrastructure in the Americas, helping customers realize the benefits of the global energy transition — providing integrated, sustainable solutions with a leading portfolio of optimization and grid edge technologies. John has 25 years’ experience, including global leadership posts managing high-growth businesses in future forward markets, including Data Centers and Distributed Energy Systems.

Christian is a Senior Vice President with Siemens Financial Services (SFS) and heads SFS’s equity investment platform in the Americas as it expands into new asset classes and innovative business models. Christian has over 20 years of experience in originating, structuring, executing and managing infrastructure and energy investments in Asia, Europe and the Americas exceeding $9 billion of total investment volume.

Management Committee

Simon Ross is a Managing Director in Energy Technology at Green Investment Group. Simon joined Macquarie from Tesla, where he was Deputy General Counsel and head of legal for the global Energy Products business. At Tesla, Simon was a core member of the team that grew Tesla’s energy storage business from pilot projects to an over 1GWh portfolio of deployed residential, commercial and utility scale projects. Based in San Francisco, Simon focuses on corporate and project level investments across a wide range of energy solutions, including battery storage, microgrids, electric vehicles, distributed energy, and consumer energy. Simon studied Politics, Philosophy & Economics at St. Hugh’s College, Oxford and law at BPP University in London.

Dan is a Senior Vice President at Macquarie Capital, where as part of the Green Investment Group, he focuses on Macquarie’s principal investments in the renewable energy sector in the Americas. Key recent transactions include the acquisition and development of a 65MW/360MWh portfolio of commercial battery storage projects in California, the formation of a national utility-scale solar development company, Candela Renewables, a joint venture with a national platform for development of a 2GW pipeline of solar development assets in the US, and Macquarie’s successful acquisition and project financing of the Norte III 900MW in-construction combined cycle gas power plant in Mexico.

Dan earned a BA (Hons) in Economics from the University of Durham, in the UK.

Matthew leads the Distributed Energy Systems (DES) business, which is responsible for delivering behind-the-meter supply-side energy solutions across both public and private sector companies. Siemens DES offerings are tailored around helping customers make smart, sustainable investments in onsite energy applications. Matthew has over 15 years of industry experience and has spent the last ten years with Siemens. Matthew’s career has been focused on energy project development, commercial advisory, structured finance, and strategic planning.

Iti is a Vice President with Siemens Financial Services based in New York and leads SFS’s investments in new business fields focused on smart cities, infrastructure and energy. Iti has over 12 years of experience in structuring and executing transactions and represents Siemens on the board of portfolio companies. Iti has worked in various countries including India, Germany, Denmark and the US. She is a certified Chartered Accountant and has received an MBA from INSEAD.