Leerer Meetingraum
Group Leadership
Experienced Investment Professionals


Roman Rosslenbroich
Chief Executive Officer
Co-Founder Aquila Capital

Roman Rosslenbroich is co-founder and Chief Executive Officer (CEO) of Aquila Capital. He is responsible for Aquila Capital’s corporate development, strategy and investments. Prior to founding Aquila Capital in 2001, he was Head of the fixed income rates division at Salomon Brothers in Frankfurt. Roman graduated in business administration from the Goethe University in Frankfurt.

Dieter Rentsch
Chief Investment Officer
Co-Founder Aquila Capital

Dr. Dieter Rentsch is co-founder and Chief Investment Officer (CIO) of Aquila Capital. He is responsible for the company's investment strategies, investment processes, key account management, finance, IT as well as risk management. Previously, he was Head of macro research at Munich Re Insurance Group (MEAG). Dieter has over 30 years of experience in the investment sector and holds a PhD in nuclear physics from the Justus-Liebig-University of Gießen.

Group Management

Michaela Maria Eder von Grafenstein
Executive & Chairwoman Investment Committees

Michaela Maria Eder von Grafenstein has more than 30 years of local and international experience in alternative assets, credit management, risk management, product development and corporate governance. Prior to joining Aquila Capital in 2013, Michaela held numerous top management positions at Allianz, Dresdner Bank and the Deutsche Bank Group. She holds a degree in law from the Ludwig-Maximilians-University of Munich.

Florian Becker
Chief Operating Officer
General Counsel Aquila Capital
CEO, Aquila Capital Investmentgesellschaft mbh (AIFM)

Dr Florian Becker is responsible for all operational, legal and governance matters. In addition to that, he heads the portfolio management unit within Aquila Capital`s AIFM. Prior to joining Aquila Capital, he worked as an attorney for several law firms in Hamburg and Sydney, where he advised corporate clients on renewable and real estate transactions as well as financial matters. He received his doctorate from the University of Regensburg and is a licensed attorney.


Christian Ohl
Chief Financial Officer

Christian Ohl heads up Aquila Capital's finance function. Prior to joining Aquila Capital in 2012, Christian was the Head of group control at a healthcare company. In 2002, he started his career in the audit and corporate restructuring divisions of Arthur Andersen (later Ernst & Young) where he was responsible for the restructuring of national and international photovoltaic, shipping and timber companies. Christian holds a degree in commercial law from Leuphana University Lueneburg and is a certified auditor and tax advisor.

Harald Schönebeck
Managing Director Aquila Capital Investmentgesellschaft mbH,
Chief Administrative Officer,
Head of Luxemburg Branch

Dr. Harald Schönebeck was Speaker of the Board of Alceda Fund Management S.A. since 2016, Aquila Capital’s fully licensed AIFM in Luxemburg. There, inter alia, he was responsible for portfolio management, business relations, finance, HR, administration and IT. He has more than 25 years of experience in the investment and capital markets business. Prior to joining Aquila Capital in 2016, he was Managing Director Corporate Finance at Commerzbank. Previous to that he headed the Rating Advisory Continental Europe for Deutsche Bank. Before, he was Managing Director at BA Venture, Cologne, a Deutsche Bank subsidiary focused on private equity investments in fast growing technology companies. Harald holds a degree in business administration from the Berlin Institute of Technology and a PhD in IT-based financial management.

Senior Leadership Team

Susanne Wermter
CEO, Aquila Clean Energy EMEA

Susanne Wermter’s team focuses their investment activities on wind, solar and direct infrastructure investments located in Europe. Susanne has 15 years of industry experience. Her track record includes managing assets throughout all phases of their investment lifecycle, and she has been involved in the implementation of more than 50 transactions. Prior to joining Aquila Capital in 2013, she held senior positions in project financing at SunEdison and was also responsible for wind and solar transactions at the Conergy Group. Susanne holds a degree in business administration from the University of Hamburg.

Rolf Zarnekow
Co-CEO, Aquila Sustainable Infrastructure

Rolf Zarnekow has over 20 years of experience in the infrastructure sector. Prior to joining Aquila Capital in 2012, he worked for numerous institutional Real estate firms in managerial roles where he was responsible for carrying out real estate transactions worth more than EUR 8 billion. Rolf holds a degree in business administration from the European Business School Oestrich-Winkel.

Alexander Lenz
CEO, Aquila Clean Energy APAC

Alexander Lenz is responsible for Aquila Capital's business in the APAC region, with a primary focus on investments in renewable energy assets. He has worked in the renewable energy sector since 2007. Prior to joining Aquila Group in 2020, Alexander was the CEO of Conergy, based in Singapore. Before moving to Asia in 2010, Alexander was Head of Corporate Development in Conergy’s former headquarters in Hamburg, Germany. Alexander was previously a consultant in the Restructuring and Corporate Finance practice of Roland Berger Strategy Consultants in Berlin, Germany and a consultant in the management consulting practice of Deloitte in Duesseldorf, Germany. He holds a master’s degree in Economics from Maastricht University, The Netherlands.

Client Advisory

Christian Holste
Head Client Advisory DACH

Christian Holste is responsible for the support of existing customers and for the acquisition of new customers. He has more than 20 years of experience in investment banking and sales, most notably for fixed income and structured products. Prior to joining Aquila Capital in 2013, Christian was the Chief Executive Officer of Banque Bauer in Geneva. Before this, Christian held positions at UBS Deutschland, Salomon Smith Barney, Citigroup, Barclays Capital and JP Morgan. He was responsible for the strategic restructuring of UBS’s fixed income business in Germany and Austria and he also served as a member of the executive board of UBS Investment Bank in Germany. Christian studied business administration at the Goethe University Frankfurt.

Lars Meisinger
Chief Investor Relations Officer

Lars Meisinger oversees Aquila Capital’s international client advisory and corporate development. He has more than 18 years of experience in the finance sector. Prior to joining Aquila Capital in 2016, Lars was responsible for strategic product development at UBS Asset Management. He previously served as Chief Operating Officer at BlackRock Alternative Investors for the EMEA region. His long professional experience includes eight years in management roles at Man Group and senior positions at AXA Investment Managers in both London and Frankfurt. Lars holds a master's degree in economics from Maastricht University and a bachelor's degree from Johann Wolfgang Goethe University, Frankfurt. He is a Chartered Alternative Investment Analyst (CAIA).

Who we are
Generating Essential Investments
Read more
What we stand for
Highly specialised experts for sustainable performance
Read more
Group Leadership
Experienced Investment Professionals
Read more
Corporate Governance
In accordance with national and international standards
Read more
News & Research
Press releases, news content and more
Read more
Ninetynine Seconds
Insights to investments strategies and current projects
Read more
In close cooperation with important drivers of the energy transition and financial initiatives
Read more