Leerer Meetingraum

Group Leadership

Experienced Investment Professionals


Aquila Capital Investment Mitarbeiter Roman Rosslenbroich
Roman Rosslenbroich
Chief Executive Officer
Co-Founder Aquila Group

Roman Rosslenbroich is co-founder and Chief Executive Officer (CEO) of Aquila Group. He is responsible for Aquila Group's corporate development, strategy and investments. Prior to founding Aquila Group 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 Aquila Capital team member
Dieter Rentsch
Chief Investment Officer
Co-Founder Aquila Group

Dr. Dieter Rentsch is co-founder and Chief Investment Officer (CIO) of Aquila Group. 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 von Grafenstein Aquila Capital team member
Michaela Maria Eder von Grafenstein
Executive & Chairwoman Investment Committees of Aquila Group

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 Group 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 Aquila Capital team member
Florian Becker
Chief Operating Officer &
General Counsel of Aquila Group

Dr. Florian Becker is COO and General Counsel of the Aquila Group.  Until the end of 2021, he was also CEO of Aquila Capital Investmentgesellschaft mbH, the capital management company of the Aquila Group. Prior to joining Aquila Group in 2013, Florian worked as a lawyer at an international law firm specialising in corporate, supervisory and real estate law. As part of his work for a large Australian law firm in Sydney he gained his first experience in the field of renewable energies in 2008-2009. Florian completed his law studies at the Georg August University in Göttingen and received his doctorate from the University of Regensburg.


Aquila Capital Team Christian Ohl
Christian Ohl
Chief Financial Officer Aquila Group

Christian Ohl heads up Aquila Group's finance function. Prior to joining Aquila Group in 2012, Christian was the Head of group controlling 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 and is a former certified auditor and syndicus tax advisor.

Aquila Capital Team Harald Schönebeck
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 Aquila Capital team member
Susanne Wermter
Chair, Aquila Clean Energy EMEA

As Chair of Aquila Clean Energy EMEA, Susanne is responsible for leading the shareholder committee of Aquila Clean Energy EMEA and mainly focused on strategic matters. She also ensures high governance standards within the company and amongst its board. Susanne has led and built the company as CEO from 2013 to 2024.

Aquila Capital Team Alexander Lenz
Alexander Lenz
CEO, Aquila Clean Energy APAC

Alexander Lenz is responsible for Aquila Clean Energy'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.

CEO Markus Holzer
Markus Holzer
CEO, Aquila Sustainable Infrastructure

Markus Holzer is leading Aquila’s Sustainable Infrastructure business. He has been in the financial sector since 2000 and in the real estate sector since 2005. He has been involved in successfully closed real estate transactions with a total volume of more than 7Bn Euro. Prior to joining Aquila Capital in 2021, he worked as a Managing Partner for Capital Bay in Berlin, Germany, where he was responsible for setting up the regulated fund business of the group. Before that, he worked as Managing Director and CIO for the German regulated fund unit of Morgan Stanley Real Estate Investing in Frankfurt, Germany. Prior to this he worked as an Associate Director at JLL and held different positions within former Dresdner Bank Group. He holds a bachelor’s degree in business administration from the Frankfurt School of Finance and Management.

Client Advisory

Aquila Capital Team Christian Holste
Christian Holste
Head Client Advisory Aquila Capital

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 Germany, 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, moreover he 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 Aquila Capital Head Client Advisory International
Lars Meisinger
Head Client Advisory International Aquila Capital

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 Goethe University, Frankfurt. He is a Chartered Alternative Investment Analyst (CAIA).

Who we are
Generating Essential Investments
Read more
Group Leadership
Experienced Investment Professionals
Read more
Corporate Governance | Aquila Capital
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