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GKO Engineering GmbH 

Winterthur · Since 2018

The core activity of GKO Engineering GmbH is planning and consulting in the field of technical building equipment (TGA), particularly in the areas of heating, ventilation, air conditioning, refrigeration, building automation, sanitary and solar systems. The company offers services such as specialized planning, special planning and specialist coordination for residential buildings, office renovations and commercial spaces, and supports architects, investors and builders in all phases of performance.

Glanz Reinigungs Service Rama 

Winterthur · Since 2020

The core activity of Glanz Reinigung is the provision of cleaning services, particularly maintenance cleaning, for private and business customers in Winterthur and its surroundings. The specific services include: maintenance cleaning for private customers, maintenance cleaning for business customers, restaurant cleaning, stairwell cleaning, window cleaning, shutter cleaning, and moving cleaning with a guarantee of acceptance. The company offers these services at a fixed hourly rate of CHF 39.80.

Glinz Bauleitungen 

Winterthur · Since 2013

The core activity of Glinz Bauleitungen is the provision of construction management services, in particular through the services of the certified construction manager Daniel Glinz.

Glitzerfee Kasper 

Winterthur · Since 2017

Glitzerfee is a fashion company specializing in the production and sale of unconventional, creative and comfortable fashion, particularly for women and girls. The company's core activity is the design, production and sale of clothing and accessories, such as skirts, dresses, pants, tops and other fashion items, all of which are manufactured in Switzerland.

Goastore GmbH 

Winterthur · Since 2014

The core activity of Goastore GmbH is the online sale of music, particularly electronic dance music and related genres such as Psy-Trance, Progressive-Trance, House, Techno, Chillout and Electronica. The company offers a wide range of music products, including CDs, vinyls and digital downloads, and ships them worldwide.

Golden-Food GmbH 

Winterthur · Since 2016

The core activity of Golden-Food GmbH is the import and sale of Greek food and delicacies, particularly olive oils, honeys, Greek spices and tea, as well as other products such as pashminas and olive wood items, with the aim of supporting Greece through direct aid.

goldhandwerk nora GmbH 

Winterthur · Since 2023

The core activity of the company "goldhandwerk nora GmbH" is the manufacture and creation of individual pieces of jewelry, particularly wedding rings, in a workshop in Winterthur. The company offers customer-specific solutions and custom-made jewelry pieces according to the highest standards.

Gölz Consulting GmbH 

Winterthur · Since 2013

Gölz Consulting GmbH provides consulting in organisational development, change management and human resources with a practical HR focus. Services include organisational and culture development, absence and health management, assessments and trainings, coaching and moderation, and conflict and crisis management.

Gomex AG 

Winterthur · Since 1971

Gomex AG designs, manufactures and sells rotor-feeding machines (Air-Power-Pumps, APP) and related wear parts. Its pneumatic conveying systems are used for materials unsuitable for standard concrete pumps — for example sand, gravel, lightweight concrete, granulates and humus-like substances — and the company also supplies spray and mortar-processing equipment and hoses.

GPA Global Procurement Assistance Switzerland GmbH 

Winterthur · Since 1998

The core activity of Global Procurement Assistance (GPA) is to provide global procurement and logistics solutions for industrial companies. This includes in particular: * Global Sourcing: Searching and selecting suitable suppliers worldwide to reduce material costs * Procurement Consulting: Supporting the optimization of procurement processes and strategies * Logistics Management: Organizing and controlling logistics processes, including production and supply chain management * Project Management: Implementing projects in the areas of Global Sourcing, Procurement and Logistics * Coaching and Consulting: Supporting companies in implementing Global Sourcing strategies and optimizing procurement processes. GPA thus offers its customers a comprehensive range of services to optimize their procurement and logistics processes and strengthen their competitiveness.

Graf Liegenschaften GmbH 

Winterthur · Since 2019

Graf Liegenschaften GmbH manages, sells and rents real estate. The firm provides property management for own and external buildings, offers partial financing or mortgage brokerage, sells investment properties and develops condominium projects with partner architects, primarily in the Zürich, Zug, Schwyz and Thurgau areas. It also maintains social housing, supports local associations and annually covers tenants' heating and ancillary costs as a holiday gift.

Graf Technik GmbH 

Winterthur · Since 2010

The core activity of Graf Technik GmbH includes the manufacture of metal parts according to customer specifications in a mechanical workshop, the sale and installation of gates and doors of all kinds, as well as the sale and maintenance of mobile wood debarking machines.

Grand Café du Musée / Wintimomo, Inhaberin Schindler Palden 

Winterthur · Since 2022

The core activity of Grand Café du Musée Wintimomo is in the field of gastronomy, specifically in the operation of cafes and restaurants, as well as in the provision of catering services. The company offers fresh, homemade, vegan and ecological food.

Grande Gusto AG 

Winterthur · Since 2008

The core activity of Grande Gusto AG is system gastronomy, particularly the operation of restaurants and cafes, such as 'Il Gelatino' and 'City Grill', with the aim of supplying a broad customer base with excellent products.

Gravenberg GmbH 

Winterthur · Since 2020

Gravenberg GmbH develops and sells biodegradable cleaning products under the 'DRUFF … und weg' brand, using microorganisms to remove organic odors and soils. The product range includes concentrated cleaners, absorber granules, a descaler (KalkKiller) and cleaning accessories for domestic and commercial use.

Groupe Curie AG 

Winterthur · Since 2020

Groupe Curie AG develops and implements green chemistry and cleantech technologies and plants, including solutions for green ammonia, hydrogen and sustainable chemical production. The company provides engineering services, project planning and integration of renewable energy systems for industrial chemical and energy projects.

Groupe Curie Wind GmbH 

Winterthur · Since 2023

Groupe Curie Wind GmbH provides engineering and consulting services in the cleantech sector, focusing on the design, construction and commissioning of plants for green hydrogen, green ammonia and sustainable chemical production. Its services include feasibility studies, technology licensing, basic and detailed engineering, project management, procurement and after‑sales technical support.

GR Software Günter Rössler 

Winterthur · Since 2008

The core activity of GR-SOFTWARE Günter Rössler Software Development is the development of individual software and software components, particularly based on C#, C/C++, ASP.NET, WEBAPI, and Angular, as well as the creation of components such as.NET controls, OCX, ActiveX, COM, COM+, and Windows services.

Grüebler-Stiftung 

Winterthur · Since 2010

Grüebler-Stiftung provides care and accommodation for needy or homeless small animals, particularly cats. It awards contributions for operational and structural facilities serving small animals and supports small projects, including the acquisition of property suitable for operating such facilities.

GRÜNGOLD GMBH 

Winterthur · Since 2017

GRÜNGOLD GMBH designs, plans, constructs and maintains nature-based outdoor spaces and provides consulting, planning, tendering, construction management and maintenance concepts for residential, commercial, industrial and public projects.

Grünmatt AG 

Winterthur · Since 2005

The core activity of Grünmatt AG is the development and management of residential complexes, in particular the construction and rental of apartments.

Grünwerk-Mensch & Natur 

Winterthur · Since 2000

The core activity of the Grünwerk association is nature conservation and environmental education. The association is committed to preserving and promoting biodiversity by carrying out activities such as planting and maintaining wild shrub hedges and high-stem fruit trees, promoting and maintaining light forests, combating invasive neophytes, and managing dry and reed meadows. In addition, the association offers environmental education programs for children, young people, and adults to promote competencies and awareness for nature conservation.

GSK Leckortung GmbH 

Winterthur · Since 2022

The core activity of GSK Leckortung is the execution of roof analyses, leak detection and roofing work for all types of roofs, particularly for flat roofs of industrial facilities, exhibition and fair buildings, workshops, school buildings and other new or renovated buildings. This also includes roof maintenance and inspections, renovation work, roof cleaning, replacement of gutters, retrofitting of fall protection systems and the installation of roof windows.

GÜNTHARD. POLITUMSETZUNG GmbH 

Winterthur · Since 2009

The core activity of Günthard. Politumsetzung GmbH is the consulting and support of organizations and individuals in the areas of political communication, leadership and communication concept development. The company offers services such as strategy consulting, communication concept development, lobbying, campaigning, media work and leadership support. It targets administrations, public institutions, private companies and people in leadership positions who need support in communication and leadership.

GUT-zusammenleben GmbH 

Winterthur · Since 2020

The core activity of Gut-zusammenleben GmbH is to advise and support individuals and organizations in developing conflict management, communication, personality development, and teamwork, with the goal of promoting well-being and cooperation in private, social, and professional contexts.

H2A raum für ideen ag 

Winterthur · Since 2020

The core activity of H2A is the planning, design and realization of future-proof work environments and interior spaces for companies. This includes services such as needs analysis, space planning, interior construction, furnishing, lighting and acoustic planning, as well as project management. The company supports customers in creating modern, flexible and motivating work environments that meet the needs of employees and the company culture.

HaFa Group AG 

Winterthur · Since 2021

The core activity of HaFa Group AG includes the execution of renovations, new constructions, roofing, facades, insulation and painting work. The focus is on providing services in the field of construction and building maintenance, including specialized painting services through the painting company 'Maler Express 57'.

Hahnloser/Jaeggli Stiftung 

Winterthur · Since 1980

The company's core activity is the preservation, presentation and promotion of art and culture, particularly through the management and exhibition of the Hedy and Arthur Hahnloser collection, as well as supporting the Kunst Museum Winterthur and the museum association.

Hälg & Co. AG, Zweigniederlassung Winterthur 

Winterthur · Since 2009

Hälg & Co. AG, Zweigniederlassung Winterthur designs, installs and maintains building services systems. The branch provides plant engineering and service for heating and cooling, ventilation and air‑conditioning, and sanitary systems, and manages renovations and industrial installations from planning through maintenance.

Halt auf Verlangen GmbH 

Winterthur · Since 2021

Halt auf Verlangen GmbH provides social-pedagogical support and outreach family work to accompany families, young people and individuals in crisis and everyday situations. Services include social-pedagogical family support, youth coaching, parental counselling, supported visitation, reintegration support, crisis intervention and animal-assisted accompaniment.

haltiner & ARCHITEKTUR AG 

Winterthur · Since 2001

haltiner & ARCHITEKTUR AG is an architectural practice offering design, planning and consulting services for new-builds, renovations and conversions. Services include work on residential and commercial projects, competition entries and advice on handling existing building fabric and spatial organisation.

HammerDrum AG 

Winterthur · Since 2022

HAND IN HAND: STIFTUNG FÜR EINE NACHHALTIGE ENTWICKLUNG 

Winterthur · Since 2005

HAND IN HAND: STIFTUNG FÜR EINE NACHHALTIGE ENTWICKLUNG supports projects for sustainable development with a focus on environmental measures, microfinance and education and training. The foundation implements projects in Haiti including water access, soil irrigation and desalination, reforestation, village savings and loan systems, literacy and scholarship programs.

Handschin & Handschin GmbH 

Winterthur · Since 2021

The core activity of Handschin & Handschin GmbH is the development, publication and distribution of educational materials for the 2nd cycle of primary school, particularly thematic editions and design books for children.

HannesFRiTZ GmbH 

Winterthur · Since 2001

Hansjürg Brauchli - Visualisieren & Kommunizieren 

Winterthur · Since 2017

The core activity of Hansjürg Brauchli's company 'Visualisieren & Kommunizieren' is to advise and support executives, particularly from the education sector, in effectively communicating and visualizing ideas and concepts. This includes the application of methods such as Sketchnoting, TED Talks, Bullet Journaling, and other visual techniques to clearly convey complex ideas and strengthen leaders in their communication.

Hansueli Füllemann 

Winterthur · Since 1999

The core activity of Gewerbehaus Hard AG is the rental and management of commercial spaces. The company offers self-managed rooms for various businesses and entrepreneurs and also takes care of property management.

HaPeS Management- & IT-Consulting GmbH 

Winterthur · Since 2004

HaPeS Management- & IT-Consulting provides consulting and management services to companies in the field of information technology and IT. The core activities include: IT Strategy: Development and implementation of IT strategies aligned with the company's business objectives; IT Management: Organization and leadership of IT units, including optimization of services with limited resources; IT Costs and Pricing: Development of models for internal or external billing of service offerings or incurred costs; Project Audit: Site assessment, quality assurance, and accompaniment of IT projects; Service-Level-Agreements (SLA): Definition and implementation of service offerings tailored to the company's needs; Interim Management: Taking over leadership responsibilities in the IT unit when a personnel bottleneck arises or a transition phase needs to be bridged.

Harpo Drain AG 

Winterthur · Since 2014

The core activity of Harpo Drain AG is the development, production and distribution of roof drains and related accessories, particularly in the field of flat roof water drainage systems in modular design made of glass fiber reinforced polyester (GFK).

Hartmann Gartenbau GmbH 

Winterthur · Since 2009

The core activity of Hartmann Gartenbau GmbH is the planning, design, construction and maintenance of gardens in and around Winterthur. This includes specific services such as: garden planning and design, laying of surfaces, plantings, rock gardens, walls, lawns and turf, construction of privacy screens, steel structures in the garden, water features and fences, garden maintenance and upkeep, construction of playgrounds and lighting systems, winter services, and the sale of Christmas trees. The company thus offers comprehensive services for the design and maintenance of gardens.

HARWY GmbH 

Winterthur · Since 2021

The core activity of HARWY is the development and production of individually designed sports jerseys and clothing for sports teams, particularly in the area of Swiss Flag Football. The company offers tailored solutions for sports teams to professionalize their appearance and strengthen their identity through unique jersey designs.

Haus der Berufsbildung AG 

Winterthur · Since 2000

Haus der Berufsbildung AG provides training services and seminars to support apprentices and vocational trainers, including workshops such as “Positive Leadership” and seminars on qualification interviews, plus practical learning tools and materials for vocational education.

Hauskunft GmbH 

Winterthur · Since 2024

The company Hauskunft GmbH primarily deals with services in the field of monument preservation and building stock. The core activities include: on-site inspections and archive research, description and evaluation of objects, creation of expert opinions on the worthiness of protection of buildings, creation of inventory lists for protected monuments, and consulting and support for construction projects in a historical context. The company thus provides expert knowledge and services to support and preserve the handling of historic buildings and sites.

HAWAdoc AG 

Winterthur · Since 1998

The core activity of hawadoc AG is to provide services and solutions for the Swiss healthcare system, particularly for physician networks, medical practices, and health insurers. This includes, among other things: The provision of the family doctor model and the promotion of cooperation between patients, physicians, and health insurers; The administration of physician networks, including member management, contract negotiation, data management, accounting, marketing, and communication; The provision of consulting services, such as trust services, debtor management, and business management consulting; The provision of tools and platforms for collaboration and communication between healthcare stakeholders; The organization of continuing education and quality circles for medical personnel; The management of patient data and the provision of invoice printing and mailing services.

H&C Treuhand AG 

Winterthur · Since 2021

The core activity of HC Treuhand AG is the provision of services in the field of financial and corporate consulting, particularly in the areas of: financial accounting, payroll accounting, tax consulting, digitalization, corporate consulting, and real estate. The company thus offers comprehensive consulting and services for companies and private individuals in the areas of finance, taxes, and corporate management.

Hecht und Heck Consulting GmbH 

Winterthur · Since 2015

The core activity of Hecht & Heck Consulting GmbH is the consulting and optimization of controlling processes for companies, particularly in the areas of finance, accounting and risk management. The company supports its customers in implementing industry-specific controlling processes, developing structures and processes, as well as selecting and implementing suitable tools. The goal is to provide customers with reliable and transparent information for the operational and strategic management of their company.

Heilart Corinne A. Zollinger 

Winterthur · Since 2021

The core activity of the company 'Heilart - Corinne A. Zollinger' is the application and dissemination of Traditional European Naturopathy (TEN) in the form of various therapies and offers, such as phytotherapy, foot reflex zone therapy, nutritional therapy and holistic massage.

Heiligberg Institut 

Winterthur · Since 1998

The Heiligberg Institute offers its own movement school with weekly ongoing group and individual sessions in prevention and therapy. The company's core activity is the application and dissemination of Psychosomatic Functional Learning (PSFL), a movement system developed by Bet Hauschild-Sutter. This includes conducting courses, workshops and individual sessions in movement design, dance therapy and solution-focused work. The company also provides training and further education in the PSFL method and publishes books and DVDs on this topic.

Heinrich Landschaftsarchitektur GmbH 

Winterthur · Since 2013

The company is an architecture and planning firm specializing in the planning and realization of various construction projects, including schools, residential buildings, commercial buildings, recreational facilities, parks, and public spaces. The company's core activity includes conducting competitions, feasibility studies, master plans, test plans, and the realization of construction projects in various phases, from planning to completion.

Heinrich Peter AG 

Winterthur · Since 1972

The core activity of Hch. Peter AG is the execution of earthworks, in particular excavation, demolition, building dismantling, concrete and bridge demolition.