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Sinatech is your specialized partner for the safety and monitoring of electrical installations in the Interlaken region and beyond. As an experienced service provider acting on behalf of network operators, Sinatech takes on key responsibilities related to electrical inspections, safety certifications, and compliance with legal requirements under the NIV and ESTI regulations. Our goal: maximum operational safety, clear processes, and complete legal security for operators of electrical systems. Comprehensive Safety and Network Monitoring Electrical installations in Switzerland are subject to strict legal requirements. Sinatech supports network operators with a comprehensive “all-in-one” package that covers all relevant tasks related to the monitoring and coordination of electrical systems. We handle essential duties such as monitoring safety certificates, coordinating with the Inspectorate (ESTI), and conducting random inspections – including notifications and documentation obligations in accordance with NIV. All schedules and implementations are individually coordinated with the responsible manager, ensuring that every process is executed efficiently, transparently, and on time. Our Services as a Network Operator Partner Sinatech undertakes comprehensive responsibilities on behalf of network operators to ensure the safety and oversight of electrical installations. Our services are practical, structured, and fully aligned with legal requirements. Electrical Inspections and SINA Safety Certification Within the field of electrical inspections and SINA safety certification, we offer a wide range of services: • Monitoring the receipt of safety certificates for electrical installations • Reviewing, preparing, and filing relevant documents for network supervision • Analyzing existing documentation and clarifying open issues with ESTI, clients, or contractors as needed • Conducting random inspections of installers and control bodies • Maintaining the electrical safety concept according to ESTI/NIV standards • Monitoring annual transformer maintenance according to contract • Annual short electrical training courses for operational electricians (Model 5+5) • Technical support during electrical work • Assistance with infrared and equipment testing • Overseeing the execution of periodic inspections • Reporting to the Inspectorate upon completion or modification of energy generation facilities • Random verification of safety certificates and initiating corrective actions when necessary • Retaining safety certificates until the next periodic inspection • Reporting serious violations to the Inspectorate by holders of installation or inspection permits or in cases of work performed without authorization Legal Compliance and Operational Safety With our technical expertise and years of experience, Sinatech ensures that all legal requirements are met and operational safety is consistently maintained. The rigorous implementation of the Low-Voltage Installation Ordinance (NIV) and close cooperation with the Inspectorate (ESTI) form the foundation of our work. We adopt a forward-looking approach, identify risks early, and act proactively. Through systematic documentation, structured procedures, and regular inspections, we minimize liability risks and provide transparency for network operators and facility managers. Your Partner for Electrical Safety in Interlaken As a locally established company, Sinatech is intimately familiar with the requirements and structures of energy providers and network operators in Interlaken and the surrounding area. Our clients benefit from short communication channels, personalized support, and efficient execution of all safety-related tasks. When it comes to electrical inspections, safety certificates, network monitoring, and NIV compliance, Sinatech in Interlaken is your reliable partner. Rely on professional coordination, legal certainty, and technical expertise – ensuring the safe and legally compliant operation of your electrical installations.

Zumbrunn Bau AG Grindelwald – Your Reliable Partner for Building Construction and Civil Engineering in the Bernese Oberland Zumbrunn Bau AG in Grindelwald has stood for quality, reliability, and professional expertise in the construction industry for many years. As an experienced construction company, we offer a comprehensive range of services for private clients, companies, planners, and public authorities. Our activities cover all work in both building construction and civil engineering – from planning to professional execution. Building Construction – New Builds Tailored to Your Needs Our main area of activity is building construction. We realize new buildings of all kinds – whether for private clients, investors, or public authorities. As a reliable and market-oriented construction partner, we build: • Residential buildings and apartment blocks • Single-family houses • Buildings for the tourism sector such as hotels, chalets, or holiday apartments • Commercial and office buildings Thanks to our modern machinery, our well-equipped yard in Grindelwald, and our motivated, highly trained staff, we are able to successfully implement even demanding construction projects efficiently and on schedule. We place great importance on clean, precise, and professional workmanship – from the first construction phase to turnkey handover. Civil Engineering – Solid Foundations for Every Project In addition to building construction, Zumbrunn Bau AG is also your competent partner for civil engineering works in Grindelwald and the surrounding area. Our civil engineering services include, among others: • Road and path construction: construction and maintenance of traffic routes • Earthworks: soil removal, earthmoving, backfilling, embankments, foundation excavation, construction pits, and trench excavation • Securing terrain drops: retaining walls, shoring walls, and anchoring systems • Slope works: cuttings, embankments, dams, and protection against landslides • Hydraulic engineering: structures for water supply, drainage, and sewer systems Especially in the alpine region around Grindelwald, precise planning, experience, and technical expertise are essential. We are familiar with the local conditions and ensure that all work is carried out safely, sustainably, and in compliance with standards. Your Construction Company in Grindelwald – Reliable and Regionally Rooted Zumbrunn Bau AG stands for personal service, high-quality execution, and on-time completion. Whether new construction, conversion, or civil engineering project – we support you competently through all phases of construction. Our goal is to create durable, functional, and cost-effective buildings that meet the high expectations of our clients. If you are looking for an experienced construction company in Grindelwald for building construction or civil engineering, Zumbrunn Bau AG is your strong partner in the Bernese Oberland. Contact us – we look forward to your project.

• Infrastructure • Civil engineering structures and bridges • Client support services • Community engineering • Rail infrastructure • Regional development & urban planning • Road engineering • Safety & fire protection • Supply & waste management • Underground construction / geotechnics • Structural engineering • Condition analysis • Earthquake safety & tremors • Fire protection • Groundworks engineering and special foundation engineering • Structural design • Energy and environment • District heating and cooling • Environmental sustainability • Natural hazards • Noise protection • Renaturation and revitalisation • Renewable energies • Sustainability consulting • Water and river engineering • Mobility and traffic • Public transport • Rail systems • Rail vehicles • Safety/RAMS