About us

Successful partner in the SME sector

Adiuva has been providing equity capital to medium-sized companies since 2011 – the mandate that is reflected in our name (Latin adiuvare: to help, support, assist). The focus of Adiuva is the acquisition of majority and minority stakes in  growing medium-sized companies primarily in German-speaking countries. Our investors are seasoned entrepreneurs. This allows us to take a long-term view on value creation.

We are never driven to sell our investments within a specific time frame. We are completely independent of institutional interests. We invest across a wide range of industries and different scenarios. Adiuva has raised over EUR 800 million and invested in more than 20 enterprises since inception. We are currently invested in 12 medium-sized companies.

Our Team

Jan Tobias Osing

Managing Partner

Before founding Adiuva Capital, Tobias Osing worked as a manager in corporate finance at Deloitte & Touche, where he advised on numerous corporate transactions for financial investors and international groups.

Prior to that, he was a member of KPMG’s M&A team, consulting on SME transactions.

After completing a banking apprenticeship at Dresdner Bank AG, Tobias Osing studied at the University of Cologne. During his studies he also worked as a management consultant in Tampa, Florida/USA.

Hauke Lübben

Managing Partner

Hauke Lübben joined the partnership at the beginning of 2014 and has been active in the private equity industry for approximately 20 years.

From 2005 to 2013, he worked at Warburg Pincus in London and Frankfurt, a leading global private equity investor. There he advised on a large number of investments in Germany and Europe.  His focus most recently had been on the energy sector.

Previously, Hauke worked for several years as a management consultant at Accenture in Munich, where he supported companies in various technology sectors in the development and implementation of strategies and business models.

Hauke earned a Master of Business Administration from Yale School of Management and a Bachelor of Science in Electrical Engineering and Economics from Yale University.

Georg Jacobi


Before joining Adiuva Capital, Georg Jacobi had already worked in the private equity industry and now has about 15 years of experience in supporting medium-sized companies during growth situations.

For Alpha Private Equity, a leading European private equity investor, he advised on a diverse range of national and international transactions in the mechanical and plant engineering as well as consumer goods and services sectors.

Georg Jacobi holds a Master of Business Administration from the University of Oxford and a Master of Science from Copenhagen Business School and spent time abroad at China Europe International Business School in Shanghai and London School of Economics. During his studies, he gained experience in various positions in the finance and investment industry.

Christoph Neizert


Christoph Neizert founded and managed the German business for two leading international private equity firms, Advent International and Warburg Pincus, from 1991 to 2008, initiating, closing, managing and selling a great deal of successful private equity investments.

Prior to this, Christoph Neizert worked for eight years in the corporate finance division of Bankers Trust in New York, Rio de Janeiro and Frankfurt as Vice President.

After a banking apprenticeship at Deutsche Bank, Christoph Neizert earned a degree in business administration from the École Européenne des Affaires in Paris, and a Master of Business Administration from Columbia Business School, New York.

Katja Marmetschke

Head of Human Capital

Dr Katja Marmetschke joined Adiuva Capital in 2021 and supports the portfolio companies across the entire range of HR and recruiting topics.

Before joining Adiuva Capital, she worked for a considerable time as an executive search consultant for two renowned executive search consultancies, where she filled numerous management positions in medium-sized companies and in the consulting environment. Her business focus was on the financial services industry and the consulting sector.

Katja Marmetschke gained international experience through her studies in Kassel, Lyon, Barcelona and Paris. She also worked for several years in Austin, Texas/USA after completing her doctorate in political science.

David Wiedemann

Investment Director

David Wiedemann has been a member of the Adiuva Capital team since 2014. His business focus includes the telecommunications, healthcare, consumer goods and industrial services sectors.

He previously gained professional experience in corporate finance at Deloitte. During his studies, he worked for two investment companies and for ThyssenKrupp in Germany and the United Arab Emirates. He completed a banking apprenticeship before going on to earn a Master of Science in Finance & Accounting at Westfälische Wilhelms-Universität Münster and Monash University in Melbourne, Australia.

Björn Biering

Investment Director

Björn Biering manages portfolio companies in the healthcare and consumer goods sectors at Adiuva Capital.

Before joining Adiuva Capital, Björn Biering worked as a division head with a focus on corporate finance / M&A for an international e-commerce group. Prior to that, he worked as an analyst in investment banking at Goldman Sachs and consulted on various transactions in German-speaking countries.

Björn Biering holds a Master of Science in Finance & Investments from Rotterdam School of Management and a Bachelor of Science in Economics from TU Chemnitz and Universidad de Salamanca.

Arne Doll

Investment Director

Arne Doll is responsible for investments and transactions in the industrial services, consumer goods and healthcare sectors at Adiuva Capital.

Before joining Adiuva Capital, Arne Doll worked as a manager in the Transactions department at PwC in Frankfurt. He also gained experience in management consulting and the finance industry during his studies. Arne Doll studied at WHU – Otto Beisheim School of Management, where he earned a Master of Science in Business Administration. He also spent time studying at Durham University and the University of Southern California – Marshall School of Business.

Yannik Isselhorst

Senior Associate

Yannik Isselhorst joined our team in 2023 as a Senior Associate. He supports Adiuva Capital in transactions and advising portfolio companies.

Prior to this, he worked for several years in private equity companies in Munich and Frankfurt and was involved in a number of transactions in the areas of mechanical and plant engineering, software and industrial services.

Yannik studied at EBS Business School in Oestrich-Winkel, where he earned a Master’s degree in Finance.

Jonas Joachimmeyer

Project Manager

Jonas Joachimmeyer is as a project manager responsible for various business development tasks and supports Adiuva Capital in portfolio management and transactions.

Before joining Adiuva Capital, Jonas worked for several years at M&A boutiques in Hamburg and Munich. There he advised on transactions of medium-sized companies in the healthcare and IT sectors, in particular for platforms of various investment companies. During his studies, he worked in corporate strategy for BMW in the USA.

Jonas holds a Master of Science in Mechanical Engineering from the Technical University of Munich.

Irina Hautzell

Head of Accounting

Irina Hautzell is responsible for fund accounting at Adiuva and is the contact person for all finance and controlling-related topics in fund administration.

Prior to joining Adiuva, Irina held various roles in the accounting department of a large media company. Earlier in her career, she carried out a senior role in the accounting department of an international petroleum company.

Irina Hautzell studied mathematics and is a qualified accountant.

Claudia Thelen

Project & Office Management

Claudia Thelen has been managing all Adiuva Capital companies since 2011 and is the first point of contact for notarial as well as legal and tax issues.

Previously, Claudia Thelen worked in human resources at a large publishing house. She studied business administration at the University of Hamburg and also trained as a paralegal.

Rebecca Novosel

Project & Office Management

Rebecca Novosel oversees the internship programme and the marketing and events departments at Adiuva Capital.

Before joining Adiuva Capital, Rebecca Novosel worked for several years in the international art market. She studied history and art history at Albert-Ludwigs-Universität Freiburg and at Universities in France and Switzerland, graduating with a master’s degree.