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Daniel Grab GmbH 

Wilen B. Wollerau · Since 2003

Daniel Grab GmbH specializes in portable ladders, trailer ladders and truck-mounted aerial ladders, and provides service and repairs including work on Ehrsam products. The company manufactures laminated wooden ladders for fire-service applications, offers maintenance, inspections and expert assessments (EN 1147/EN 131), and produces and stocks spare parts.

DATA Security AG 

Wilen B. Wollerau · Since 2019

The core activity of DATA Security AG is to advise and support companies in implementing the Swiss Data Protection Act (revDSG) and the EU General Data Protection Regulation (EU GDPR). To this end, the company offers a software solution called "DATA Security Manager" that supports companies in analyzing and optimizing their data protection processes. In addition, the company offers a "full-service consulting" service, where data protection experts support companies in implementing the legal requirements.

DERTOUR Destination Services AG 

Wilen B. Wollerau · Since 1999

DERTOUR Destination Services AG provides on-site tour-guiding and guest services in various holiday destinations, offering information about destinations and available local services. The company is part of the DERTOUR Group (REWE Group) and maintains customer support accessible during travel.

DigiToys-Systems AG 

Wilen B. Wollerau · Since 1997

DigiToys-Systems AG sells model railway vehicles and accessories for gauges 0, 1 and 2 m, including brands such as LGB, KISS and Pullman, and supplies digital systems from ZIMO, Massoth, ESU and Roco Z21. The company provides repairs, digital conversions, in-house production of spare parts, workshop services (milling, laser cutting) and training for control software.

Dirinco AG 

Wilen B. Wollerau · Since 1995

The core activity of Dirinco AG is the development, production and distribution of medical products, particularly in the field of haemodialysis and intensive care, with a focus on solutions for the treatment of patients with kidney failure and other critical illnesses.

DITOGAMES AG 

Wilen B. Wollerau · Since 2022

The core activity of DITOGAMES AG is the development and provision of online games.

DIWINGS Management Consultants AG 

Wilen B. Wollerau · Since 1995

The core activity of DIWINGS Management Consultants AG is management consulting, particularly the optimization of processes, organizational structures, cultures and working methods, in order to support companies in shaping and implementing change processes.

Domizilbox Swiss GmbH 

Wilen B. Wollerau · Since 2010

The core activity of Symedya.com Informationsdienste is the provision of services in the field of information brokerage, media production, and publishing. Specifically, this includes: Marketing and PR services, including sponsoring and public relations; Creation and distribution of information and news, including reports, interviews, photo and video reports, as well as digital media productions; Publication of publications in online and print media, including own productions and commissioned works; Offering individual solutions for self-organization and corporate communication. Overall, the core activity of the company can be described as an information and media service provider.

Domprojekt Schweiz GmbH 

Wilen B. Wollerau · Since 2016

Domprojekt Schweiz GmbH provides design, production and construction of low-energy prefabricated buildings, focusing on residential houses as well as commercial and public buildings such as kindergartens, schools and healthcare facilities.

easyDOK AG 

Wilen B. Wollerau · Since 2014

The core activity of easyDOK is the development and distribution of software solutions for electronic care documentation, particularly for nursing homes and the entire care sector.