About Us

Our goal is to convey information to your target group precisely and emotionally. Each member of our team brings professional competence and experience to bear to contribute to the success of our numerous and diverse projects.

Sustainability and social responsibility are important to us; the products we develop are made to last.

We undertake every step of the work with care and attention, along with enthusiasm for new things. The result is exciting productions that will inspire and entertain your visitors.

Meet the team

Gürsan Acar (Managing Director)

Always on the lookout for new solutions for museums, tourism and companies, he has headed the company for 15 years. He applies his wealth of experience to implement innovative ideas.

Klaus Kornblum (Deputy Managing Director)

He is an all-rounder who advances the processes and structures in the company, while never losing sight of its goals.

Dr. Hans von Seggern (Consultancy | Sales)

The historian and German philologist advises our customers in Germany and abroad. He is a frequent lecturer on the topic of digital interpretation in museums.

Birgitta Thrun (Authorized Signatory)

She is responsible for our divisions of finance and advertising. She is involved in the development of the company and always keeps a watchful eye on the costs.

Greta Gesenberg
(Consultancy & Sales)

The art historian advises you on all aspects of multimedia tours and creates with you a suitable interpretation concept for all your visitor groups.

Anja Schlereth
(Consultancy & Sales)

Is your contact person for all questions concerning group guide systems and tourGuides. She provides comprehensive advice and works out the best price-performance concept for you based on your requirements.

Philipp Hinz
(Consultancy & Sales UK)

The cultural and media scientist who grew up in England is always up-to-date. He looks after our customers in the UK.


Celine Dupeux
(Consultancy &­ Project Management France)

Our French colleague with a background in radio, TV and print journalism looks after our customers in France and Belgium.

Timur Coban
(Project Manager)

Coordinates the processes in all project phases and communicates between sales, technology and studio. He is your contact person for all questions concerning the project process up to the successful finalisation of your project

Klaus Kowatsch
(Artistic Director)

With years of experience in the production of audio plays, he is responsible for the artistic general management at tonwelt.

Stephanie Kissel
(Artistic director)

Since 2007 Stephanie Kissel has been working with tonwelt on artistic project management and concept development. In addition to editing and directing audio and multimedia content for children, young people and adults, she also realises projects with a focus on audio description and simple language.

Daniel Franz
(Corporate Communications)

As communication designer, he is responsible for the visual and communicative appearance of the company and accompanies the development in the field of UX/UI for tonwelt's multimedia guides.

Johannes Maibaum
(Media and information technology)

Johannes Maibaum supports the tonwelt team since 2017 and is responsible for hardware and software planning. In addition, he develops new features and application solutions in cooperation with the team and is responsible for technical installation and support.

Nemanja Petkovic
(Service Dept.)

The trained systems technician is the technical go-to person for our customers in matters of service, repairs and maintenance.