Our Team

Our team thrives on its diverse characters. Technological know-how and economic expertise are firmly established in our company. Furthermore, practical relevance is very important to us and we can incorporate our own start-up experience. Our staff’s qualifications go beyond the bounds of the start-up industry. Accordingly, the BerlinerStrategen are characterized by individually gained perspective as well as a common interest in foresight, new ideas and breaking new ground with our clients.
Mask to bevel teammembers
Portrait - Tilman Süss Round circle surrounding portraits

Tilman Süss

Managing Director, Coach and Consultant
Technical studies in Berlin and London in addition to an early affinity have provided Tilman with an in-depth understanding of digital media. Various start-ups and digital projects eventually led to him founding the BerlinerStrategen in 2011. Apart from managing director he is now Business Angel, consultant for business strategy and financial matters as well as management coach and lecturer. As recommended lead coach for Berlin’s universities he does not only advise businesses, but also scientific teams and spin-offs. Besides that, he volunteers as mentor, jury member and consultant.
Mask to bevel teammembers
Portrait - Christian Schellenberger Round circle surrounding portraits

Christian Schellenberger

Managing Director, Coach and Consultant
Christian has worked in the areas internet/IT and mobile services for over 15 years. He combines his excellent know-how in the world of digital innovations with corresponding entrepreneurial experience. As a consultant he gained extensive skills working at Amaze, Pro7 Digital Media, Skanska AG and many more as well as various start-ups, which he supported not only with his expertise, but also the strategic business structure. Christian works parallel to his executive position at BerlinerStrategen as mentor, juror and consultant and supports social businesses.
Mask to bevel teammembers
Portrait - Oliver Hasse Round circle surrounding portraits

Oliver Hasse

Head of Innovation Strategy / Finance
With more than ten years of professional experience as a manager and consultant in the private and public sectors, Oliver leads the Innovation Strategy and Finance team at BerlinerStrategen. His key areas of expertise include innovation management and strategy, finance and strategic business development for technology-driven companies. Prior to his current role, Oliver advised clients ranging from multinationals to start ups as a senior manager with a major international consulting firm. Oliver has significant expertise in the public sector, having worked with both the European Commission, the German Bundestag as well as several governments as a consultant. Besides his professional roles, Oliver is president of the Alumni Council of the European School of Management and Technology, member of the Freunde der Pinakothek der Moderne e.V. and, since 2011, acts as a mentor to start-up companies.
Mask to bevel teammembers
Portrait - Robert Sternberg-Raasch Round circle surrounding portraits

Robert Sternberg-Raasch

Corporate Finance Analyst
Robert has extensive experience in Corporate Finance and international credit matters of large financial institutions. His career includes a number of credentials and awards of recognised international magazines in areas of structured commodity trade finance, including TFR Deal of the year 2012. Already during his studies of international business administrations in Frankfurt and Hawaii, Robert founded the first companies and gathered experience in self-organised IPOs. With regards to BerlinerStrategen, Robert is drafting grants and support application for start-ups and consults our customers on corporate finance matters and contractual drafting.
Mask to bevel teammembers
Portrait - Mathias Dumke Round circle surrounding portraits

Mathias Dumke

Corporate Finance Analyst
Mathias has gained a comprehensive knowledge of financial and accounting issues after having graduated in business administration and having worked several years for an internationally orientated Berlin tax consultancy. Due to the broad fiscal assistance provided for several Berlin based start-ups he became familiar with the Berlin start-up scene. At BerlinerStrategen Mathias assists clients with the preparation of business plans, grant applications and further business management issues.
Mask to bevel teammembers
Portrait - Britt Perlick Round circle surrounding portraits

Britt Perlick

Consultant Education / Public Sector
Having worked many years for the start-up promoting programmes at Freie Universität Berlin and being responsible for setting up sales structures for the companies of young founders, Britt gained a sufficient knowledge in the Organisational Consultancy. In addition to her in-depth knowledge in start-up project evaluation and innovations, she is also very confident with organization and implementation of workshops on the subject of business formation. In accordance with her skills and methodologial expertise in the field of developing the business models and ideas, Britt supports Berliner Strategen in accomplishing the workshops for the start- ups, established companies and universities. Moreover, she offers business and management coaching and will be in charge of creating the new event concepts.
Mask to bevel teammembers
Portrait - Thomas Dünwald Round circle surrounding portraits

Thomas Dünwald

Environmental Consultant
Thomas is our leading expert in environmental protection and ecology. During his time as a student of geography, urban planning, and environmental management Thomas could also already gain significant experience in the field of international and intercultural cooperation as he took part in workshops, excursions and research trips in Southeast Asia, sub-Saharan Africa, and the US. After completing his master’s, he worked at the Delegation of German Industry and Commerce in Nairobi. At BerlinerStrategen Thomas works at our development aid, environmental protection, and education projects.
Mask to bevel teammembers
Portrait - Joerg Geier Round circle surrounding portraits

Joerg Geier

Investor Relations
With an MBA in e-Commerce (Golden Gate University, San Francisco) and intl. expertise in the development of global markets for clean technologies, Joerg identifies and furthers synergies between science and a sustainable economy on behalf of the Borderstep Institute. He builds bridges between ideas and capital in Germany and California, which includes the LA Cleantech Incubator’s Network for Global Innovation. Joerg is a member of various selection committees for start-up competitions (e.g., Energy Academy and Big Ideas@Berkeley). At BerlinerStrategen he uses his skills in the area of investor support and impact investing to evaluate and develop technological innovation strategies.
Mask to bevel teammembers
Portrait - Mirko Roloff-Oestergaard Round circle surrounding portraits

Mirko Roloff-Oestergaard

Marketing Consultant and Coach
Mirko is at home both online and offline. As he has a degree in economics, he is characterized by a wide range of experiences in the area dialogue marketing and distribution at well-known companies. When he gives lectures at Berlin universities, he conveys his integrated knowledge of communications. Additionally, Mirko is owner of and coach at one of the best sailing schools in Berlin. At BerlinerStrategen he supports founders and young enterprises as a consultant and coach for marketing strategies on their way from product to a successful market launch.
Mask to bevel teammembers
Portrait - Jördis Brankatschk Round circle surrounding portraits

Jördis Brankatschk

Finance Operations Consultant
Jördis has worked in various start-ups for many years and brings extensive experience in finance, accounting, and the start-up scene to our team. As a consultant for finance operations at BerlinerStrategen, Jördis assists our management in all matters concerning accounting and building finance processes.
Mask to bevel teammembers
Portrait - Julian Grevesmühl Round circle surrounding portraits

Julian Grevesmühl

Student Employee
Julian is studying chemistry and economics at the Westfälische Wilhelms-Universität Münster and supports our team as a working student