Delivering on the Promise of Energy Transformation

Two trusted global brands delivering total energy management and scalable, distributed energy 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 distributed 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 through our Energy as a Service (EaaS) business model.

Our Values

We adhere to our word

Credibility is key. We are committed to energy transformation 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

Leadership Team

As Chief Executive Officer at Calibrant Energy, Matt oversees the company’s growth and development of innovative clean energy solutions for its clients. Prior to joining Calibrant, Matt had more than 25 years of experience in the energy industry. He served as the CEO of REC Solar, where he oversaw its integration by Duke Energy and led expansions into new customer segments and product offerings. Matt also served as the Chief Commercial Officer for The AES Corporation’s U.S. strategic business unit, a multi-billion-dollar energy portfolio. Most recently, he held a senior position at Invinity Energy Systems, a global leader in vanadium flow batteries.

Ray is Chief Operations Officer at Calibrant Energy, where he focuses on all project and company operational aspects for Calibrant. Prior to joining Calibrant, Ray served as the President at Kenyon Energy where he was responsible for all aspects of the business. Ray was previously the COO for GE Technology Finance and Bay4 Capital and had previously held various executive positions within the fields of finance and operations. Ray graduated from the University of Notre Dame with a B.S. in Mechanical Engineering and earned an MBA from the University of Florida.

Yanni is the Chief Technical Officer at Calibrant Energy, where he leads Engineering, Procurement, Construction, and Asset Management. Yanni brings more than a decade of experience developing Solar, Fuel Cell and Energy storage systems in USA and Europe. Before joining Calibrant Energy Yanni ran Project Development at Advanced Microgrid Solutions developing a first of its kind 65MW/360MWh Virtual Power Plant in California. Yanni is an Imperial College London alumni with an MSc in Electrical and Electronic Engineering.

Sean is Managing Director, Strategic Origination of Business Development at Calibrant Energy. He helps acquire new projects and build pipelines for new business partnerships by overseeing the expansion of Calibrant’s network of developers. Previously, Sean worked at Altus Power, where he was the Co-Head of Origination and Head of Special Situations and is credited with helping deploy over $300 million of equity into PV solar and battery storage. Prior to that, he held roles at Healthy Planet Partners and Syncarpha Capital. Sean holds a Master of Applied Finance degree from Macquarie University and Bachelor of Commerce and Bachelor of Laws degrees from the University of New South Wales.

Thomas is Director of Business Development & Partnerships at Calibrant Energy, where he focuses on Calibrant’s commercial strategies and project origination in the Americas. Prior to joining Calibrant, Thomas served as Chief Commercial Officer at Kenyon Energy where he was responsible for establishing partnerships with developers and EPCs nationwide while overseeing all activities related to business development and strategy. Thomas was previously a Vice President at Bay4 Energy, a Board Member at the Clean Energy Leadership Institute (CELI) and is currently an active member in the CREO Syndicate. Thomas graduated magna cum laude from Rollins College with a B.A. in international business and earned an MBA from the Crummer Graduate School of Business at Rollins with dual concentrations in finance and entrepreneurship.

Cliff has served as General Counsel and adviser to the Board of Directors to renewable energy companies since 1999. During that time, Cliff has spearheaded efforts to raise equity capital from venture-backed funds and private equity firms; helped develop strategy and execution of operating plans to create value and growth; and structured, negotiated, closed, and restructured renewable energy projects with sophisticated debt-financing and tax-equity transactions for solar and waste-to-energy facilities. Cliff has strong problem-solving and risk management skills developed in growth-oriented companies, and is an experienced hands-on point person for merger, acquisition and deal making activities as well as regulatory management and compliance efforts in solar and energy companies. Cliff holds a bachelor’s degree from Duke University, Durham, North Carolina, and a Juris Doctor degree from Emory University, Atlanta, Georgia, where he served on the Emory Law Journal Board of Editors.

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.

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.

Board Advisor

Clay is the Founder, Chairman, and CEO of Sun Financial. Previously, Clay was the Founder, Chairman and CEO of Kenyon Energy and Bay4 Energy. He also serves as Chairman and Managing Partner of the Biddinger Family Foundation and his family partnership. Clay serves in an advisory capacity for several other private and non-profit organizations. Previously, Clay served as President & CEO of GE Technology Finance and GATX Technology Finance. Prior to that, Clay founded and led Sun Financial Group and Bay4 Capital. For over 40 years, Clay has brought his strategic, financial, and entrepreneurial experience to a number of businesses and corporations. Clay graduated from Rollins College with a B.A. in business.

Investment Committee

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.