Whether by remote maintenance, telephone or on-site - we are there when things go wrong! Your computer professional from the greater Basel area supports you with computer problems, repairs, service, IT support and offers tailor-made solutions for private individuals and companies.

ControlTech Engineering AG (CTE) is your leading engineering company in the Basel and Northwest Switzerland region. We are specialized in the automation of process engineering plants up to laboratory processes as well as flexible overall IT solutions in the industrial environment of the pharmaceutical, chemical, biotech and food industry (Operational Technology). With our expert knowledge and many years of experience in automation and IT, CTE supports you competently in the processing of your projects: From small projects to complex large-scale projects, from preliminary projects to basic and detail engineering to the commissioning of plants.

Welcome to KOCH Group AG. With over 300 employees at five locations in Switzerland, we have been providing innovative products, expert advice and tailored services for decades. Our range includes over 100,000 items – from fittings and tools to machines, security technology and factory equipment. Our strengths at a glance: • Range: Over 100,000 items for furniture production, windows, doors, fastening technology, security technology and much more – all tailored to your needs as a tradesperson. • Online shop : A modern shopping experience with easy navigation, detailed product descriptions, CAD data and customisable interfaces for business customers. • Logistics: Efficient processes in our 14,000 m² logistics centre guarantee fast and flexible deliveries – individually tailored to your requirements. • Security technology: Planning, realisation and maintenance of locking systems and access controls by our experienced specialists. • Trade stores: In Bern, St. Gallen and Wallisellen, we offer practical advice, pick-up options and an inspiring exhibition for those interested in building. With the latest technology, dedicated employees and a comprehensive range of services, we create sustainable added value for our customers. Whether at our locations or online – professionals come to KOCH .

• Order conveniently by phone, fax and shop • Competent specialist advice • High availability • Full range • Fast delivery and collection service • Best conditions • Environmentally friendly Officearena AG is a leading provider of office supplies and office equipment for companies in Switzerland. With a wide range of high-quality products and services, we help our customers create efficient and productive work environments. Our range includes everything a modern office needs, from stationery and printers to ergonomic furniture and organizational solutions. We attach great importance to quality and reliability, which is why we only work with reputable manufacturers to offer our customers the best products on the market. In addition, we offer tailor-made solutions for the individual needs of our customers. Our experienced team is available to provide expertise and advice to ensure you get the right products for your office. As a responsible company, we are also committed to sustainability. We offer environmentally friendly products and strive to make our business practices as sustainable as possible. Officearena AG is proud to have been a trustworthy partner for companies of all sizes for many years. We strive to provide our customers with world-class service and innovative solutions to optimize their work environments and promote their business growth.

Based in Sarmenstorf, Switzerland, Retrotec is your reliable partner for custom technology solutions. From electrical engineering and IT networks to control systems and electronics, we bring your visions to life. With Swiss precision, extensive experience, and state-of-the-art technology, we deliver the highest quality standards to realize your projects efficiently and sustainably. Electrical Engineering: Tailored Solutions for Industrial Applications Retrotec provides bespoke control systems, energy management solutions, and custom machinery and prototypes. • Energy Efficiency & Security: Optimize your systems for sustainable energy use and transition to renewable resources with our expertise. • Custom Control Systems: Unique solutions designed to meet your specific needs, ensuring flexibility and operational excellence. Let us transform your challenges into solutions, from concept to commissioning. Electronics: Repair, Optimize, Innovate From developing innovative prototypes to restoring older systems, Retrotec offers comprehensive electronic services. • Retrofit: Modernize existing machines for enhanced performance and sustainability – an affordable alternative to new purchases. • Prototyping: Bring your product ideas to life with precision and attention to detail. • Repairs: Our extensive component inventory and reverse engineering expertise enable us to restore nearly any device. At Retrotec, innovation and sustainability are at the core of everything we do. Control Systems & Machinery: Custom-Made for Your Business Retrotec specializes in building customized machinery and control systems tailored to your exact requirements. • Specialized Solutions: From small series production to fully customized designs, we deliver what your business needs. • Industrialization Support: Transition smoothly from prototype to mass production with our expertise. Our mission is to exceed your expectations with intelligent engineering and top-tier quality. IT & Networks: High-End Technology for Maximum Performance In today’s digital age, Retrotec is your trusted partner for secure and high-performance IT and network solutions. • Data Centers: Efficient, scalable server rooms designed for maximum uptime and reduced operational costs. • Network Infrastructure: High-performance solutions featuring the latest hardware and connectivity technologies. • Cybersecurity: Safeguard your data with firewalls, VPNs, two-factor authentication, and more. Boost productivity, security, and speed with IT solutions designed by Retrotec. Why Choose Retrotec? • Swiss Quality: All our development, design, and manufacturing is proudly Swiss-made, ensuring precision and durability. • Sustainability: We prioritize eco-friendly processes and resource-efficient solutions. • Customer Focus: From initial consultation to delivery, our dedicated team supports you every step of the way. Start your next project with us! Visit our website at www.retrotec.ch to learn more about our services and capabilities.

Gruner All according to plan. Gruner is a leading engineering, design and planning consultancy in the construction industry. In the business areas buildings, infrastructure, and energy, we support our private and public clients in all project phases from strategic planning through construction to commissioning and management of buildings and infrastructure. In doing so, we combine services from a comprehensive range of competencies such as structural design, geotechnics, general planning, building services, energy production and distribution, road and rail construction, civil engineering, environment, safety, security, and spatial planning in order to offer optimal and sustainable solutions. With more than 1.100 highly qualified employees in over 30 offices in Switzerland, Germany, Austria, Serbia, Georgia, Turkey and Tajikistan, as well as at countless project locations worldwide, we are always close to the customer and where development and construction are taking place. Thanks to interdisciplinary cooperation, we set new standards in engineering methods and the application of digital processes. We are constantly evolving in step with our customers. Gruner is an independent family business headquartered in Basel/Switzerland and we are proud that we have been providing innovation and inspiration since 1862.

Electrical planning with passion. Our company accompanies you from the planning of complex technical systems and installations to commissioning. We are happy to pass on our expertise to you. In an all-round carefree package that guarantees quality. Our services related to building electrical engineering Are you looking for a competent partner in building electrical engineering? Whether new construction, conversion or renovation - we advise you individually and purposefully. We accompany you and your project from A to B and beyond. From the preliminary project to the tender to operation. Together with you we plan your project, monitor deadlines and budget. On request, we will be happy to take over the coordination of the specialist construction or the management of the building owner. We live electrical engineering - and understand planning, building and management as a holistic process. As an independent engineering office, we offer individual consulting and planning services for electrotechnical building equipment. Our offer is particularly suitable for builders, investors, general planners and architects in the following sectors: Chemistry, pharmaceuticals, biotechnology Banks, Insurance, Telecom, Services Private and public administrations industrial and commercial buildings data center What we do: high-voltage systems Medium voltage systems, transformer stations low-voltage distribution systems Emergency power supply systems, backup power systems and UPS systems substation control systems busbar and cable systems Power installations, installation systems Lighting installations, lighting controls low-voltage installations Audio and visual systems Room controls and bus systems Communication systems (image, data, voice) IT, WAN- LAN systems Security systems (fire, value protection and intrusion) Lightning protection and EMC Specialist site management for technical building equipment The TGA specialist construction management ensures that the process and building technology systems are implemented according to the specifications of the planner by the executing contractors and installers. To ensure the overall function, we carry out an integrated test. This enables us to show the interactions between the various trades, systems and system parts and to rectify any defects immediately. I