These Swiss environmental services companies are primarily mid-sized to large organizations, many with an international reach. They specialize in areas such as climate change assessment, sustainable energy, waste management, and carbon solutions. Notable firms include the World Meteorological Organization, which advances meteorological science, and Romande Energie, providing sustainable energy solutions in French-speaking Switzerland. IPCC assesses climate change, while South Pole advises on decarbonization and climate finance. Geocycle transforms waste into resources, and Climeworks specializes in direct air capture for CO₂ removal.
The data shows a strong presence of organizations involved in climate science, carbon management, and sustainable resource utilization. There is a concentration of headquarters in Geneva, Zurich, and Lausanne, indicating key hubs for environmental expertise and operations within Switzerland.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
World Meteorological Organizationwmo.int
The company advances meteorological science for the betterment of society through international cooperation and advocating for an Earth system approach |
871 | |||
| 2 |
Romande Energieromande-energie.ch
A leading energy company in French-speaking Switzerland, offering sustainable energy solutions, services, efficiency, and electric mobility to create a better living environment |
841 | |||
| 3 | 782 | ||||
| 4 |
South Polesouthpole.com
Global carbon asset developer and climate consultancy advising governments and businesses on decarbonisation and climate finance projects worldwide. |
705 | |||
| 5 |
Geocyclegeocycle.com
Global provider of sustainable waste solutions, transforming waste into resources through recycling and valorizing non-recyclable materials to achieve zero waste and decarbonization goals |
538 | |||
| 6 |
Geoquip Marinegeoquip-marine.com
Specialist provider of offshore geotechnical site investigations and engineering services, utilizing advanced drill rigs and seabed testing tools worldwide |
457 | |||
| 7 |
Climeworksclimeworks.com
A company specializing in carbon dioxide removal through direct air capture technology, storing CO₂ geologically for thousands of years for climate impact at scale |
399 | |||
| 8 |
HOLINGERholinger.com
Innovative engineering and scientific solutions provider with 90 years of experience, offering cost-effective, ecologically forward-looking projects across various fields |
352 | |||
| 9 |
Earthworm Foundationearthworm.org
Collaboration with companies to address environmental and social challenges in supply chains, promoting sustainable production benefiting people and nature. |
338 | |||
| 10 | 309 | ||||
| 11 |
Vipa Groupvipagroup.com
Global merchandiser of recovered paper, prime paper, stock lots, and recyclable raw materials with a wide network covering Europe, USA, Asia, and the Middle East Market leader in trading and collection recycling |
308 | |||
| 12 |
Quantisquantis.com
Partnering with consumer goods and financial sectors to enable sustainable transformation aligned with planetary boundaries and future-proof business models. |
300 | |||
| 13 | 285 | ||||
| 14 |
EcoSecuritiesecosecurities.com
Develops nature-based solutions, carbon dioxide removals, and energy transition projects, deploying over $1 billion in climate finance and generating 400 million carbon credits. |
281 | |||
| 15 |
SCB Groupstarcb.com
provides bespoke solutions for climate goals, supports financing of emission reduction and removal projects globally with expert team |
272 | |||
| 16 | 233 | ||||
| 17 |
Hug Engineeringhug-engineering.com
A leading supplier of low emission solutions for Diesel and gas engines in Marine, Power Generation, and Mobile applications with in-house production of key components |
230 | |||
| 18 |
Thommen Groupthommengroup.com
A leading European recycling group offering complete solutions for industry, commerce, and municipalities, with a global network and focus on resource conservation |
216 | |||
| 19 |
Gold Standardgoldstandard.org
Develops and verifies rigorous standards for climate and sustainable development projects, ensuring impactful, transparent, and responsible environmental and social outcomes worldwide. |
202 | |||
| 20 |
GIST Impactgistimpact.com
GIST Impact is a leading provider of impact data and analytics, working with companies, investors, and partners to measure and quantify impact globally |
185 | |||
| 21 |
Planairplanair.ch
Engineering consultants committed to sustainable development since 1985, specializing in energy efficiency, renewable energy, and environmental protection for various clients |
173 | |||
| 22 |
GEOTEST AGgeotest.ch
An independent environmental and geological engineering team in Switzerland with over 50 years of experience providing expert services worldwide |
167 | |||
| 23 |
Gaea21gaea21.org
A Swiss non-profit association promoting sustainable development and Agenda 21, connecting private companies, public entities, and civil society for collaboration and facilitation |
165 | |||
| 24 |
myclimatemyclimate.org
A non-profit foundation providing consulting, education, and climate protection projects to help reduce carbon emissions and promote sustainability for businesses globally |
161 | |||
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| 25 |
MBP Solutionsmbpsolutions.com
MBP Solutions offers by-product collection services and sales of sustainable products, connecting suppliers and customers for mutual benefit and environmental impact |
152 | |||
| 26 |
Zehnder Clean Air Solutionszehnder-cleanairsolutions.com
provides industrial air cleaning solutions ensuring high quality clean air in workplaces, enhancing employee health, productivity, and business efficiency |
140 | |||
| 27 |
RWB Groupe SArwbgroupe.ch
An engineering firm with over 160 employees creating sustainable living environments for public and private clients through spatial planning, water, energy, and environmental projects |
129 | |||
| 28 | 97 | ||||
| 29 |
ThomasLloyd Groupthomas-lloyd.com
Leading provider of clean energy, technology, and finance solutions focused on Asia, driving sustainable development and climate change mitigation. |
71 | |||
| 30 | 50 | ||||
| 31 | 45 | ||||
| 32 |
Sieber Cassina + Partner AGscpag.ch
The company provides innovative and environmentally friendly solutions in the fields of geology, engineering, and environmental planning through interdisciplinary collaboration and partnership |
36 | |||
| 33 |
ROMAG aquacare AGromag.ch
Offering solutions for water treatment and purification, aiming to be a leading provider of technology and components to create value for customers and respect for water |
31 | |||
| 34 |
Resilio I B Corp certifiedresilio-solutions.com
Resilio helps organizations achieve a sustainable IT transition by assessing digital footprint and implementing strategies to reduce IT costs Consulting and training services available |
26 | |||
| 35 |
Naturpark Gantrischgantrisch.ch
The Gantrisch Nature Park is a regional park of national significance, focused on preserving and promoting the natural environment |
24 | |||
| 36 |
FairWild Foundationfairwild.org
This organization implements sustainable, fair, and value-added management for wild-collected natural ingredients, promoting a future that is fair and sustainable for both resources and people |
20 | |||
| 37 |
IUCN Business and Natureiucn.org
This company aims to transform how businesses value and invest in nature, working with a diverse network to safeguard the natural world |
18 | |||
| 38 |
Anthesis Switzerlandanthesisgroup.com
An international marketing agency in Geneva offering a full range of creative services to help global companies and non-profits engage and captivate audiences worldwide |
18 | |||
| 39 |
Membrapor AGmembrapor.ch
A leading manufacturer of high-quality electrochemical gas sensors measuring toxic gases in ppm to ppb range Specializing in Environmental Air Monitoring and Breath Analysis |
16 | |||
| 40 |
ENCO Energie-Consulting AGenco-ag.ch
A consulting company specializing in sustainable energy solutions, including municipal energy management, renewable energy, national and international partnerships, and smart city initiatives |
10 | |||
| 41 |
GEO Partner AGgeopartner.ch
GEO Partner AG provides customized solutions for environmental and resource management, working with a diverse team and a network of specialists |
9 | |||
| 42 |
Veolia | Environmental Sensorsneroxis.ch
A Swiss company acquired by Veolia, specializing in MEMS technology for environmental monitoring solutions with low energy consumption and long lifespan |
9 | |||
| 43 |
Composite Recyclingcomposite-recycling.ch
Innovative company recycling glass fiber reinforced plastics into glass fibers and pyrolysis oil for reuse in manufacturing new composites Scaling up to tackle environmental waste |
9 | |||
| 44 |
Stiftung SENSerecycling.ch
SENS eRecycling is a Swiss non-profit foundation operating a nationwide take-back system for electronic devices and promoting sustainable recycling solutions |
6 | |||
| 45 |
CONTREC AGcontrec.ch
Your partner for analytical measurement devices and software, providing solutions for research labs, manufacturing facilities with high emissions, and other industries |
6 | |||
| 46 |
ExoLabsexolabs.ch
Provides tailored software and real-time satellite data for improved business intelligence, reducing costs and boosting efficiency across various sectors. |
5 | |||
| 47 |
Oester Messtechnik GmbHmesstechnik.ch
Specializing in emissions monitoring and data acquisition services, the company provides tailored solutions for measuring environmental impacts |
5 | |||
| 48 |
Portolan Associationportolan-association.org
The company installs and calibrates observation stations, connects to early warning systems, disaster response measures, and provides training on data retrieval and communication |
4 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 14, 2026.
More company lists in Switzerland
- The largest companies in Switzerland 6,776
- Multinational companies in Switzerland 1,793
- Companies with in-house R&D in Switzerland 916
- Financial services firms in Switzerland 875
- Manufacturers in Switzerland 748
- Real Estate companies in Switzerland 637
- IT Services and IT Consulting companies in Switzerland 574
- Hardware manufacturers in Switzerland 538
- Financial Services companies in Switzerland 525
- IT services companies in Switzerland 438
- SaaS companies in Switzerland 435
- Retail chains in Switzerland 424
- Professional services firms in Switzerland 402
- Software Development companies in Switzerland 380
- Critical infrastructure operators in Switzerland 378
- Family-owned companies in Switzerland 346
- Consulting firms in Switzerland 288
- Publicly traded companies in Switzerland 262
- Pharmaceutical companies in Switzerland 242
- Property management companies in Switzerland 227
- Companies with a mobile app in Switzerland 225
- Medical Equipment Manufacturing companies in Switzerland 225
- Medical device companies in Switzerland 223
- Investment Management companies in Switzerland 216