Renens is home to a diverse group of companies, ranging from established public services to specialized engineering and human resources firms. Notable among them are Transports publics de la région lausannoise SA, which manages public transport in the Lausanne area, and Interiman Group, a provider of temporary staffing services. Other key players include Gruner Stucky Ltd, a leader in dam and hydropower design, and Orange Communications SA, a telecommunications company.
The companies in Renens show a mix of sectors, with a strong presence in engineering, human resources, and telecommunications. Several companies, such as Transports publics de la région lausannoise SA (founded 1896) and Gruner Stucky Ltd (founded 1926), have long histories, indicating a mature business environment. However, there are also younger firms like SWISSto12 (founded 2011), specializing in advanced RF products for satellites.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Transports publics de la région lausannoise SAt-l.ch
Manage and operate public transport services in Lausanne region, ensuring safe, reliable travel and contributing to sustainable urban development. |
1,204 | |||
| 2 |
Interiman Groupinteriman-group.ch
Providing temporary staffing services to thousands of companies and public authorities in Switzerland, focusing on human relations and efficiency. |
815 | |||
| 3 |
Medicalismedicalis.ch
Specialist healthcare recruitment agency in Switzerland, providing executives, doctors, and care profiles for various healthcare institutions with personalized and efficient solutions |
423 | |||
| 4 |
Gruner Stucky Ltdgruner.ch
A world leader in dam and hydropower design, providing services for construction, rehabilitation, dam safety studies, energy transmission, and pumped storage |
312 | |||
| 5 |
Orange Communications SAorange.com
Connects users with new career opportunities by providing a link to its updated careers page on LinkedIn, showcasing available positions. |
291 | |||
| 6 |
ECAL University of Art and Design Lausanneecal.ch
A leading art and design school with international recognition, offering a wide range of bachelor and master programs, along with collaborative projects with prestigious firms |
246 | |||
| 7 |
SWISSto12swissto12.com
A leading manufacturer of advanced RF products, satellite payloads, and systems, specializing in 3D printing technology for lightweight, high-performance telecommunications and surveillance solutions |
224 | |||
| 8 |
swisspro SR SAswisspro.ch
Leading provider of innovative solutions in electrical engineering, communication, and building automation in the French-speaking region of Switzerland, offering comprehensive services from planning to maintenance |
208 | |||
| 9 |
Phida Constructionphida-groupe.ch
A leading waterproofing company in French-speaking Switzerland, specializing in roofing, founded in 1971 and now directed by Frédéric Aleman |
199 | |||
| 10 |
MassChallenge Switzerlandmasschallenge.org
A leader in accelerating startups globally, specializing in climate-responsible businesses They have helped startups raise over CHF 12Bn in funding |
182 | |||
| 11 |
Groupe Leuba SAgroupe-leuba.ch
Family-owned automotive group with 11 modern garages representing 5 renowned brands Providing top-quality services including sales, maintenance, bodywork, parts, tire storage, and renewable energy use |
180 | |||
| 12 |
TESA Technologytesatechnology.com
Global leader in precision measurement instruments including height gauges, callipers, micrometers, dial gauges for quality control and inspection. |
157 | |||
| 13 |
GESTE Engineeringgeste.group
A multidisciplinary engineering organization specializing in transportation systems and infrastructure projects, offering innovative solutions worldwide in rail, urban, road, and building sectors |
120 | |||
| 14 |
Fondation PROFAprofa.ch
A public utility foundation in Vaud Canton dedicated to enhancing the quality of emotional, relational, and sexual well-being at every stage of life |
118 | |||
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| 15 |
Procimmo SAprocimmo.ch
An asset manager of real estate collective investments approved by FINMA, managing property assets worth 4 billion Swiss francs in various funds |
70 | |||
| 16 |
OFISA Informatique SAo-i.ch
OFISA Informatique SA is an independent software and IT services company in Switzerland, specializing in solutions for government, real estate, finance, and businesses |
64 | |||
| 17 |
Publiaz immobilier SApubliaz.ch
An independent real estate company in Vaud, Switzerland, providing a range of property services and managing over 12,000 properties across the region |
40 | |||
| 18 | 32 | ||||
| 19 |
TieTalenttietalent.com
A career growth platform for tech professionals, connecting them with exclusive opportunities and companies with the rare talents they need |
30 | |||
| 20 |
Hydromeahydromea.com
Hydromea develops a data management platform for underwater applications that improves asset integrity, reduces costs, and minimizes environmental impact |
25 | |||
| 21 |
Advice Groupadvicegroup.ch
A young financial advisory company in French-speaking Switzerland, specializing in insurance, healthcare, taxes, pension, and credit solutions with a focus on quality and customer loyalty |
24 | |||
| 22 | 21 | ||||
| 23 |
Junior 42 Lausannej42l.ch
An innovation hub of talented IT students offering tailor-made solutions in software development, cybersecurity, data analysis, and IT consultancy services |
13 | |||
| 24 |
Architecture et Constructionarchitectes.ch
An architectural and construction information center providing resources and expertise in the industry |
13 | |||
| 25 |
INERGIOinergio.ch
A technology company specializing in lightweight and compact fuel cells that operate on various fuels for clean, efficient, and portable energy solutions |
11 | |||
| 26 |
KOMP-ACTkomp-act.com
Develops integrated electric actuators comparable in price, size, and weight to pneumatic counterparts, aiming to reduce automation industry's energy costs and carbon footprint. |
6 | |||
| 27 | 5 | ||||
| 28 | 5 | ||||
| 29 |
L'Immobilier Social
The company promotes affordable social housing by offering elegant, energy-efficient apartments at moderate prices with reduced expenses for tenants |
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 12, 2026.
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