Office Services for Businesses in Zug, Switzerland and Across the DACH Region Since 1989, we have been supporting businesses with reliable services in administration, accessibility, and flexible office infrastructure. Our team works with a personal, discreet, and solution-oriented approach, gving you more time to focus on clients, projects, and growth, while we take care of calls, processes, and administrative tasks. A well-functioning back office is the foundation of a professional working day. This is precisely where Sekretariat Häller GmbH steps in. We provide businesses with a versatile office service that adapts flexibly to your needs. Whether it is call handling, document preparation, data entry, appointment scheduling, or holiday cover. We carry out every task with care and reliability. Our personal approach ensures that the solutions we deliver do not feel generic, but truly fit your business. This keeps you reachable for your clients, organised internally, and fully operational in your day-to-day operations.