Tamo Zwinge is the managing director of Companisto and worked as a lawyer in the large international law firm CMS Hasche Sigle in the areas of company law, corporate transactions, and private clients for several years. Because of his expertise, Tamo is specifically responsible for the legal structure of Companisto and the continuous optimization of the Companisto model in terms of follow-up financing by venture capital companies.

Together with David Rhotert, Tamo founded the Berlin start-up "partycard" in 2001 and served as its managing director until it was sold in 2005. Tamo studied law at the Freie Universität Berlin and completed his legal clerkship in Berlin and Pretoria, South Africa. Afterward, he received a Master of Laws (LL.M.) degree in commercial law with the specializations of "International Company and Capital Markets Law," "Corporate Governance," and "International Sales and Finance" at the University of Auckland, New Zealand. Tamo has published articles on different aspects of corporate governance in international journals, for instance in the U.S. and in the UK.

Tamo is frequently impressed by the large number of very good and innovative ideas in Germany. He envisions a crowdinvesting platform that will enable these ideas to be implemented in such a way that not just a few but many people –the Companists – will benefit from it.

David Rhotert is the managing director of Companisto and specializes in consulting start-ups as an independent lawyer.

Already during his studies, he had founded "partycard," his first start-up, in 2001, which he managed together with Tamo Zwinge until they sold their shares in 2005. He knows the challenges and difficulties young company founders are faced with from his own experience. Crowdinvesting is meant to improve this situation.

David was born in Berlin and studied law at the Freie Universität Berlin. He was employed by the research and documentation service of the German Bundestag before he worked in the legal department of a major German company in Beijing for some time. During his work in two large international law firms, he also gained an in-depth knowledge in the domain of mergers & acquisitions.

He is a member of the "Kompetenzteam Mittelstand" (team of experts on small and medium enterprises) and of the committee for innovation, technology, and industry of the Berlin chamber of industry and commerce (IHK Berlin). Since 2011, he has been involved in the project "IchMachMichSelbständig.de" of the Berlin chamber of industry and commerce and has been supporting the Wirtschaftsjunioren (young entrepreneurs) Berlin. He is also a member of the Genshagener Kreis (Genshagen circle), an association established by the Einstein Foundation Berlin in order to improve communication between leaders from the areas of business, science, arts, and culture.

Cristian is a passionate and innovative programmer, who has been developing high-quality software systems for more than ten years. Whenever he designs frameworks, web infrastructure, relational databases, or other scalable data systems, he is in his element.

At Companisto, Cristian deals with the operation and development of the platform and ensures its consistent improvement.

Christoph Schweizer has been involved in venture capital and business angel financing for over 20 years, including as a former partner at btov Partners, a leading European venture capital provider for entrepreneurial private investors.

Christoph Schweizer has been involved in venture capital and business angel financing for over 20 years, including as a former partner at btov Partners, a leading European venture capital provider for entrepreneurial private investors.

As Head of Portfolio Administration, Robert Wegner is responsible for managing our portfolio. In close coordination with the investment team, the development of the portfolio companies is regularly analysed and appropriate measures taken. With his in-depth knowledge of the portfolio companies, he is thus the important interface between the investors, the portfolio companies and Companisto.

For more than 10 years, he has accompanied the start-up scene and gained a lot of experience. His experience includes positions at the Berlin Economic Development Agency - Berlin Partner -, the Digital Association BITKOM and a leading global law firm, where he deepened his great expertise in the areas of communication, financing, process and project management.

At Companisto he is engaged in knowledge transfer and regularly organizes Tech Talks. He is interested in the fields of artificial intelligence, blockchain technologies, Internet of Things and FinTechs.

Andreas represents Companisto on the advisory board of NIMMSTA GmbH, among other things. He is also responsible for the acquisition, financing and operational support of selected start-ups and maintains close contact with our investor network.

Previously, he worked for one of the leading companies in the renewable energy sector. As Director of Finance, he spent several years in California and was responsible for the development and expansion of the national holding company, as well as the company's expansions in the U.S., Mexico and Canada. After his return to Munich, he was responsible for setting up the headquarter’s Investment Management.

Nicky is a senior investment manager and part of the deal flow team. He is responsible for the acquisition and analysis of deals and structures the financing rounds on Companisto. Besides his academic education in finance, he has a personal interest in the world of venture capital investing. He is particularly motivated to enable the implementation of innovative business ideas with a lasting impact. 

He studied economic sciences (finance) at the University of Hohenheim and gained experience in international trade and finance at the locations Dubai, Bangkok and Denpasar. 

Dr. Robin Ghosh joined Companisto in October 2023 and is responsible for identifying, analyzing and evaluating startups, especially in the northern region of Germany. In addition to deal sourcing, his tasks include due diligence, contract negotiations, and close communication with business angels. Previously, he worked for the German Aerospace Center (DLR) for 10 years. Most recently, he coordinated the INNOspace initiative for the German Space Agency to promote innovation, startups and cross-industry technology transfer. In this context, the doctor of engineering established, among other things, nationwide cross-industry networks.

Erik joined Companisto in April 2023 and is responsible for deal sourcing, analysis and evaluation of startups.

Previously, he completed a master's degree in economics with a focus on entrepreneurship. In the process, he gained experience in an M&A consultancy as well as in the financing of start-ups and spent several years in the world of blockchain technologies.

Tim joined the Companisto team in December 2024 and is responsible for identifying, analyzing and evaluating startups. Through his experience in leading accelerator and incubator programs as well as working with large corporations, he has acquired extensive know-how in the areas of digital health, innovation and investor relations.

As co-founder of a mental health company, Tim has successfully built the sales, technology and operations departments. His vision is to promote sustainable innovation in order to tackle socially relevant challenges in a forward-looking way.

Florian Huber has been working as an Investment Associate at Companisto since April 2022. He is responsible in particular for identifying and supporting promising young companies in the southern region of Germany. Previously, he completed a master's degree in economics, which he successfully completed with a focus on crowdinvesting. His goal is to drive innovation and thus actively shape the future.

Mit einer beeindruckenden Vergangenheit in der Film- und Fernsehbranche ist Ramin Shahnazary unser Experte für den Sekundärmarkt. Wir schätzen uns glücklich, so ein Multitalent in unserem Team zu haben.

After completing her training as an office management assistant at KPMG, she set off for new shores. Through a professional school friend, she came across our eager shores and dropped anchor.
Angelika has been actively supporting the portfolio team since September 2022. She looks after administrative and project management issues, as well as some portfolio processes.
In addition to her training as a businesswoman for office management, she has also successfully completed her additional qualification as a European businesswoman.

Vincent joined Companisto in February 2025 and is studying Finance & Management at the International School of Management with a focus on company valuation and financial analysis. He supports the investment team in identifying and analyzing exciting companies and previously gained experience in the analysis and valuation of listed companies as well as at an international auditing firm.

Sarah Buge brings more than 10 years of customer care experience to the team, with most of her experience in the FinTech and e-commerce sector. Her vision is to provide an excellent service experience for every companion. To achieve this goal, she and her team will support our investors from the moment they register on the platform until the successful completion of the investment rounds.

Robert Riedel is Backoffice Operations Manager at Companisto. He worked for many years in the operational management of a ground services provider for aircraft handling at Berlin airports and is therefore very familiar with services, customer contact and operational day-to-day business - even under time pressure. At Companisto, he takes on administrative tasks, custody account transfers, handles the secondary market and supports the portfolio team with updates and surveys.

Michael Weidemann joined Companisto in October 2020 and is responsible for the administrative management and monitoring of non-customer specific processes. From the notary appointment over the capital increase to the deposit transfers to the disbursements, he ensures in the background a smooth process for our investments.
His many years of experience as teamlead in the areas of commerce, customer and payment service distinguish him.

Hajredin has been working at Companisto since the end of 2023 and is responsible, among other things, for supporting our investors through to the completion of an investment as well as planning and moderating events.

He gained many years of experience in the telecommunications market and as an e-commerce manager and made a short trip to the solar industry before joining Companisto.

Pascal is the Backoffice Operations Manager at Companisto.
He worked for a payment service provider for several years, where he was the first point of contact for crowd platforms.
At Companisto, he now takes care of the smooth running of internal tasks. From the notary appointment for the capital increase to custody account monitoring and payouts.
Pascal's mother tongue is not only German, but also Sorbian. A minority in Lusatia.

As Onboarding Manager, Marvin ensures a smooth start of new Companists. After years of experience in direct customer contact in the Customer Success area, Marvin specialized in an emphatic onboarding of new customers and partners. With this experience, he diligently ensures an efficient transfer of knowledge so that the first steps at Companisto of new members of our network go off easily.

Birgit Sternasky has been part of the Companisto team since March 2023 and has been providing strong support for investors right through to the completion of an investment.
Among other things, she is always available to answer questions about your investment. Birgit can look back on over 10 years of professional experience in the field of customer care and was at home in recruiting for over 6 years. She is characterised by her knowledge of human nature, gut instinct and strong communication skills.

Janette is the magic dust that keeps our office running. With her successful degree in economics, more than five years of professional experience as a branch manager for one of the most successful coffee hubs in Berlin, and her networked way of thinking, she makes sure that everything runs smoothly here and that Companisto is a place of harmony. Every now and then, she also has a kind word for our printer.

Cristian is a passionate and innovative programmer, who has been developing high-quality software systems for more than ten years. Whenever he designs frameworks, web infrastructure, relational databases, or other scalable data systems, he is in his element.

At Companisto, Cristian deals with the operation and development of the platform and ensures its consistent improvement.

Bogdan is our ambitious problem solver with more than ten years of experience in website development, database management, and software testing. Dedicated to his work, Bogdan is an active contributor in the open source scene and a dynamic member of the PHP community.

Christos is a passionate web developer who has been developing professional websites and complex web applications for the past eleven years. It is his principle to write clean, easily maintainable and extendable code, and to create applications that elegantly blend security and functionality with attractive design and usability.

Together with Cristian, Christos contributes to the platform's maintenance, functionality, and extension and keeps it up-to-date with the latest trends and requirements.

 Vlad is a PHP programmer with more than seven years of experience in developing complex applications. His job in the team is to ensure that development is aligned with new technologies and software design patterns. Always open-minded and creative, Vlad plays an important role in the team.

Maricel has more than 10 years of experience in IT, specifically in server management and optimization. This expertise enables him to find creative solutions for complicated and subtle coding issues. Database management helps him to improve and streamline data storage and establish new security protocols.

His calm personality and analytical thinking allow him to overcome all the challenges.

Alexandra is the office manager of our department. Her role is to ensure a good working environment, to schedule meetings and appointments, organize the office layout, maintain the office condition and arrange necessary repairs, organize office operations and procedures, and to provide general support to visitors.

Very dynamic and creative, Alexandra succeeds in making everybody smile.

Alexander Haja is Head of HR and Office Management at Companisto. He and his team take care of all aspects of human relations and office management. He ensures the satisfaction of all employees and a harmonious working environment. In short: Alex is something like the good spirit of Companisto.

The certified project management expert (IPMA) comes from the Far North - which is certainly the reason for his calm mind, his level-headed nature and definitely his "Moin Moin!", or "Moin Moin! Alex has a proven communication coach and businessman for dialogue marketing.

Sara makes things happen.

She organizes everything that has to do with our office and work equipment, so that everyone can do their work and everything runs smoothly at Companisto. And if she has a really good day, she sometimes orders ice cream for the whole team.

In addition to her training as an office management assistant, Sara has also successfully completed her additional qualification as a European businesswoman.