# The 100 largest professional services firms in Switzerland Tamtam tracks 402 professional services firms headquartered in Switzerland. This list ranks the 100 largest by number of employees on LinkedIn, led by Adecco, SGS and The Adecco Group. Their median headcount is 665. Half of them were founded in 1983 or later. The most common headquarters are Zurich (29), Basel (11) and Geneva (11). These Swiss professional services firms include some of the largest companies in the sector, specializing in human resources, IT consulting, and business advisory. Notable examples are Adecco, a top provider of HR solutions, and SGS, which offers testing, inspection, and certification services. Luxoft, part of DXC Technology, provides bespoke technology solutions, while SoftwareOne specializes in software and cloud solutions. The list reveals a strong presence of IT services and consulting, with companies like Bechtle Schweiz AG and Modis focusing on digital transformation and technology solutions. Many firms, such as Egon Zehnder and Mantu, offer global consulting services, indicating a concentration of international professional expertise within Switzerland. πŸ‡¨πŸ‡­ Switzerland Β· 100 companies Β· Updated Nov 12, 2026 | # | Company | Industry | Headquarters | Employees | Founded | |---|---|---|---|---|---| | 1 | [Adecco](https://www.tamtam.ai/c/adecco) (adecco.com)
Top provider of HR solutions matching talented individuals with job opportunities worldwide, offering industry insight, training, and mentoring for career development | Staffing and Recruiting | πŸ‡¨πŸ‡­ Zurich | 199,071 | | | 2 | [SGS](https://www.tamtam.ai/c/sgs) (sgs.com)
Leading global company providing testing, inspection, and certification services to help organizations achieve high standards of quality, compliance, and sustainability. | Professional Services | πŸ‡¨πŸ‡­ Baar | 74,385 | | | 3 | [The Adecco Group](https://www.tamtam.ai/c/the-adecco-group) (adeccogroup.com)
Global talent company providing employability, digital and engineering solutions, and workforce optimization across multiple industries and countries. | Human Resources Services | πŸ‡¨πŸ‡­ Zurich | 19,418 | | | 4 | [Luxoft](https://www.tamtam.ai/c/luxoft) (luxoft.com)
A global digital strategy and software engineering firm, part of DXC Technology, offering bespoke technology solutions to drive business innovation worldwide | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Zug | 15,420 | | | 5 | [Bechtle Schweiz AG](https://www.tamtam.ai/c/bechtle-schweiz-ag) (bechtle.com)
Leading IT service provider for SMEs, large customers, and public institutions, offering consulting, infrastructure, cloud, services, and software solutions throughout the entire IT life cycle. | IT Services and IT Consulting | πŸ‡¨πŸ‡­ MΓ€genwil | 12,000 | 1983 | | 6 | [SoftwareOne](https://www.tamtam.ai/c/softwareone) (softwareone.com)
Global provider of software and cloud solutions, specializing in migration, modernization, and optimization for clients worldwide Headquartered in Switzerland | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Stans | 11,985 | | | 7 | [Social Group - socialgroup.ch](https://www.tamtam.ai/c/social-group-socialgroup-ch) (socialgroup.ch)
Optimizing digital business ecosystems, enhancing LinkedIn presence for sustainable growth, measurable success, and maximum efficiency in sales and recruiting. | Business Consulting and Services | πŸ‡¨πŸ‡­ Wallisellen | 10,803 | 2012 | | 8 | [Amaris Consulting](https://www.tamtam.ai/c/amaris-consulting) (amaris.com)
Independent technology consulting firm providing guidance and solutions to businesses worldwide through a diverse team of experts in various industries Partner of Mantu | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Geneva | 7,500 | 2007 | | 9 | [Mantu](https://www.tamtam.ai/c/mantu) (mantu.com)
Global consulting firm offering leadership, technology, digital marketing, and talent management services to connect companies with leading teams and technology for sustainable success | Business Consulting and Services | πŸ‡¨πŸ‡­ ChΓͺne-Bourg | 6,905 | | | 10 | [Evalueserve](https://www.tamtam.ai/c/evalueserve) (evalueserve.com)
A global company offering AI solutions powered by subject matter experts to enhance decision-making, with a focus on diversity and inclusion | Business Consulting and Services | πŸ‡¨πŸ‡­ Zug | 6,033 | 2000 | | 11 | [Cotecna](https://www.tamtam.ai/c/cotecna) (cotecna.com)
Provider of testing, inspection, and certification services for safer and more efficient supply chains across agriculture, food safety, minerals & metals, and consumer goods sectors | International Trade and Development | πŸ‡¨πŸ‡­ Plainpalais | 4,685 | 1974 | | 12 | [Egon Zehnder](https://www.tamtam.ai/c/egon-zehnder) (egonzehnder.com)
A global leadership advisory firm with consultants from diverse industries and functions, dedicated to transforming individuals, organizations, and the world through leadership | Business Consulting and Services | πŸ‡¨πŸ‡­ Zurich | 3,346 | 1964 | | 13 | [Modis](https://www.tamtam.ai/c/modis) (modis.com)
Engineering and digital experts accelerate innovation and digital transformation by providing end-to-end solutions, talents, and academy services across various technology sectors. | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Zurich | 3,274 | | | 14 | [ROSEN](https://www.tamtam.ai/c/rosen) (rosen-group.com)
Global provider of cutting-edge solutions in integrity management, with technology-driven services for asset inspection, engineering consultancy, customized systems, and research & development | Public Safety | πŸ‡¨πŸ‡­ Stans | 3,168 | 1981 | | 15 | [Edmond de Rothschild](https://www.tamtam.ai/c/edmond-de-rothschild) (edmond-de-rothschild.com)
Investment house focusing on wealth management, emphasizing responsible investment to generate financial, societal, and personal returns for clients. | Financial Services | πŸ‡¨πŸ‡­ Geneva | 2,961 | 1953 | | 16 | [PSI CRO](https://www.tamtam.ai/c/psi-cro) (psi-cro.com)
Global contract research organization specializing in predictable patient enrollment and on-time delivery of clinical trials across multiple therapeutic areas. | Pharmaceutical Manufacturing | πŸ‡¨πŸ‡­ Zug | 2,912 | 1995 | | 17 | [PwC Switzerland](https://www.tamtam.ai/c/pwc-switzerland) (pwc.ch)
Global network of firms providing quality assurance, advisory, and tax services in 157 countries, with a focus on building trust and solving important problems | Professional Services | πŸ‡¨πŸ‡­ Zurich | 2,827 | 1912 | | 18 | [Vontobel](https://www.tamtam.ai/c/vontobel) (vontobel.com)
Vontobel helps individuals and institutions invest their financial capital by offering a range of solutions and wealth planning services worldwide | Financial Services | πŸ‡¨πŸ‡­ Zurich | 2,533 | 1924 | | 19 | [dss+](https://www.tamtam.ai/c/dss-geneva) (consultdss.com)
A leading provider of operations management consulting services focused on saving lives, creating a sustainable future, and enabling organizations to improve operations responsibly | Business Consulting and Services | πŸ‡¨πŸ‡­ Geneva | 2,403 | 1968 | | 20 | [KPMG Switzerland](https://www.tamtam.ai/c/kpmg-switzerland) (kpmg.com)
Providing audit and advisory services to SMEs and global companies, focusing on practical solutions and long-term client relationships. | Business Consulting and Services | πŸ‡¨πŸ‡­ Zurich | 2,298 | | | 21 | [ELCA Group](https://www.tamtam.ai/c/elca-group) (elca.ch)
Leading Swiss provider of IT services and solutions, specializing in cybersecurity, data & AI, cloud, software development, and digital experience across industries | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Pully | 2,026 | 1968 | | 22 | [ZΓΌhlke Group](https://www.tamtam.ai/c/zuhlke-group) (zuehlke.com)
Global innovation partner delivering working solutions for holistic growth, closing gaps between strategic ambition, tech implementation, and operational excellence across industries | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Schlieren | 1,900 | 1968 | | 23 | [Protectas](https://www.tamtam.ai/c/protectas) (protectas.com)
Leader in security services offering specialized guarding, technology solutions, consulting, and investigations tailored to individual customer needs for effective security solutions worldwide | Security and Investigations | πŸ‡¨πŸ‡­ Lausanne | 1,815 | 1976 | | 24 | [GAM Investments](https://www.tamtam.ai/c/gam-investments) (gam.com)
Independent asset management firm specializing in active investment strategies, managing diverse client assets globally with experienced professionals and innovative products. | Financial Services | πŸ‡¨πŸ‡­ Zurich | 1,716 | 1983 | | 25 | [ARX \| smart minds](https://www.tamtam.ai/c/arx-smart-minds) (arx.ing)
Network of specialists providing engineering and design solutions across infrastructure, city, energy, and industry sectors worldwide with local expertise. | Civil Engineering | πŸ‡¨πŸ‡­ Grono | 1,383 | 1950 | | 26 | [Eraneos](https://www.tamtam.ai/c/eraneos) (eraneos.com)
A management & technology consultancy helping organizations navigate and leverage the digital age to stay ahead and seize opportunities | Business Consulting and Services | πŸ‡¨πŸ‡­ Zurich | 1,378 | 1992 | | 27 | [Baschi.SALE](https://www.tamtam.ai/c/baschi-sale) (socialgroup.ch)
LinkedIn Services: Positioning brands, driving awareness, generating leads and revenue through high-quality content on LinkedIn Contact for help with sales, marketing, and recruiting strategies | Professional Training and Coaching | πŸ‡¨πŸ‡­ Wallisellen | 1,362 | 2012 | | 28 | [BDO Switzerland](https://www.tamtam.ai/c/bdo-switzerland) (bdo.ch)
A leading Swiss audit, accounting, and consulting firm with a strong national network, serving SMEs, listed companies, public authorities, and non-profit organizations | Business Consulting and Services | πŸ‡¨πŸ‡­ Zurich | 1,282 | | | 29 | [VZ VermΓΆgensZentrum](https://www.tamtam.ai/c/vz-vermogenszentrum) (vermoegenszentrum.ch)
Switzerland’s top financial service provider offering expertise in retirement planning, investments, insurance, estate planning, tax optimization, and financial management for individuals and businesses | Financial Services | πŸ‡¨πŸ‡­ Zurich | 1,157 | 1993 | | 30 | [Schule in Berlin](https://www.tamtam.ai/c/schule-in-berlin) (socialgroup.ch)
A primary/secondary education company located in Berlin, Germany, providing educational services for students in a school setting | Marketing Services | πŸ‡¨πŸ‡­ Wallisellen | 1,138 | 2012 | | 31 | [Gruner](https://www.tamtam.ai/c/gruner) (gruner.ch)
Offers comprehensive engineering and planning services for private and public building owners in building construction, infrastructure, and energy, from strategic planning to renovation. | Engineering Services | πŸ‡¨πŸ‡­ Basel | 1,104 | 1862 | | 32 | [Merkle DACH](https://www.tamtam.ai/c/merkle-dach) (merkle.com)
A leading data-driven customer experience management company specializing in delivering personalized marketing strategies and driving improved results for top companies worldwide | Marketing Services | πŸ‡¨πŸ‡­ Geneva | 1,073 | | | 33 | [Kaizen Institute Global](https://www.tamtam.ai/c/kaizen-institute-global) (kaizen.com)
Organization specializing in continuous improvement and lean management methodologies to drive growth, sustainability, and development through partnership with clients globally | Business Consulting and Services | πŸ‡¨πŸ‡­ Zug | 1,063 | | | 34 | [LGT Capital Partners](https://www.tamtam.ai/c/lgt-capital-partners) (lgtcp.com)
Specialist in alternative investments managing over USD 110 billion across private markets, multi-alternatives, and sustainable strategies for institutions worldwide. | Investment Management | πŸ‡¨πŸ‡­ PfΓ€ffikon | 1,050 | 1998 | | 35 | [River Advice](https://www.tamtam.ai/c/river-advice) (riveradvice.com)
River Advice is a leading platform providing comprehensive services for passenger ships in European inland waters, focusing on safety, environmental protection, and customer satisfaction | Maritime Transportation | πŸ‡¨πŸ‡­ Basel | 974 | 2004 | | 36 | [ERNI](https://www.tamtam.ai/c/erni) (linktr.ee)
Innovative Swiss software engineering firm boosting businesses with method-based consulting, partnership-oriented technology services, and cost-conscious delivery across multiple locations | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Lucerne | 954 | 1994 | | 37 | [Wincasa](https://www.tamtam.ai/c/wincasa) (wincasa.ch)
Leading Swiss real estate service provider offering planning, construction, management, revitalization, and repositioning services throughout property lifecycle. | Real Estate | πŸ‡¨πŸ‡­ Opfikon | 920 | | | 38 | [NonStop Consulting](https://www.tamtam.ai/c/nonstop-consulting) (nonstopconsulting.com)
An award-winning recruitment consultancy providing permanent, temporary, RPO, and MSP services across multiple sectors in Europe and the USA, emphasizing ethics and training for long-term careers | Staffing and Recruiting | πŸ‡¨πŸ‡­ Zug | 857 | | | 39 | [ZEDRA](https://www.tamtam.ai/c/zedra-group) (zedra.com)
International provider of tailored advice in wealth management, corporate services, global expansion, pensions, incentives, and fund solutions for businesses, families, individuals, and asset managers | Financial Services | πŸ‡¨πŸ‡­ St. Helier | 834 | 2016 | | 40 | [Interiman Group](https://www.tamtam.ai/c/interiman-group) (interiman-group.ch)
Providing temporary staffing services to thousands of companies and public authorities in Switzerland, focusing on human relations and efficiency. | Human Resources Services | πŸ‡¨πŸ‡­ Renens | 815 | 1998 | | 41 | [CSD ENGINEERS](https://www.tamtam.ai/c/csd-engineers) (csd.ch)
A leading engineering consultancy enterprise developing cost-efficient solutions in construction, environment, and natural resources with a presence across Europe | Engineering Services | πŸ‡¨πŸ‡­ Givisiez | 792 | 1970 | | 42 | [PIT Solutions](https://www.tamtam.ai/c/pit-solutions) (pitsolutions.com)
Expertise-led digital service provider with 23 years of experience creating human-centered solutions Specializing in Microsoft, SAP, Typo3, Magento, Contenful, and more ISO certified | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Rapperswil | 779 | 2000 | | 43 | [Metyis](https://www.tamtam.ai/c/metyis) (metyis.com)
Develops and delivers AI, data, digital commerce, marketing, and design solutions, and provides advisory services for lasting business growth. | Business Consulting and Services | πŸ‡¨πŸ‡­ Baar | 770 | 2013 | | 44 | [Chain IQ Group AG](https://www.tamtam.ai/c/chain-iq-group-ag) (chainiq.com)
Global procurement service partner offering strategic, tactical, and operational procurement with digitalization, spend management, and ESG compliance across multiple countries. | Business Consulting and Services | πŸ‡¨πŸ‡­ Baar | 747 | 2013 | | 45 | [AMAC Aerospace Switzerland AG](https://www.tamtam.ai/c/amac-aerospace-switzerland-ag) (amacaerospace.com)
Providing VIP aircraft completions, maintenance, charter, management, spare parts supply, and consulting services for business and private aviation markets. | Aviation and Aerospace Component Manufacturing | πŸ‡¨πŸ‡­ Basel | 740 | 2007 | | 46 | [Cognizant Netcentric](https://www.tamtam.ai/c/cognizant-netcentric) (netcentric.biz)
End-to-end digital partner specializing in transforming brand experiences, enhancing customer engagement with Adobe Experience Cloud | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Zurich | 729 | 2012 | | 47 | [EBP Global](https://www.tamtam.ai/c/ebp-global) (ebp.global)
Providing interdisciplinary consulting and engineering services focused on sustainable development, urban planning, infrastructure, IT, and socio-economic analysis worldwide. | Business Consulting and Services | πŸ‡¨πŸ‡­ Zurich | 717 | | | 48 | [Solvias](https://www.tamtam.ai/c/solvias) (solvias.com)
Provides CMC analytical testing and API development for small molecules, biologics, and gene therapies with global GMP-certified facilities. | Pharmaceutical Manufacturing | πŸ‡¨πŸ‡­ Kaiseraugst | 712 | 1999 | | 49 | [South Pole](https://www.tamtam.ai/c/south-pole) (southpole.com)
Global carbon asset developer and climate consultancy advising governments and businesses on decarbonisation and climate finance projects worldwide. | Environmental Services | πŸ‡¨πŸ‡­ Zurich | 705 | 2006 | | 50 | [Amstein+Walthert](https://www.tamtam.ai/c/amstein-walthert) (amstein-walthert.ch)
Leading Swiss building technology company providing sustainable, efficient engineering, consulting, and project management services across building lifecycles for diverse clients. | Construction | πŸ‡¨πŸ‡­ Zurich | 665 | 1927 | | 51 | [Malik (fka Management Zentrum St. Gallen)](https://www.tamtam.ai/c/malik-fka-management-zentrum-st-gallen) (malik-management.com)
The company specializes in innovative system-cybernetic general management, governance, and leadership solutions to help organizations excel in complex environments | Business Consulting and Services | πŸ‡¨πŸ‡­ St. Gallen | 654 | 1984 | | 52 | [Spring Professional](https://www.tamtam.ai/c/spring-professional) (lhh.com)
An international recruitment firm specializing in various industries, providing tailored staffing solutions for clients globally, from entry-level to senior executive roles | Staffing and Recruiting | πŸ‡¨πŸ‡­ Zurich | 650 | | | 53 | [MERA](https://www.tamtam.ai/c/mera) (orioninc.com)
A global business and technology services firm specializing in digital strategy, experience design, and engineering with over 4,000 associates worldwide | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Zurich | 620 | | | 54 | [Emch+Berger Group](https://www.tamtam.ai/c/emch-berger-group) (emchberger.ch)
Provides design, consulting, and project management for infrastructure, real estate, structural engineering, surveying, energy, environment, and mobility projects. | Construction | πŸ‡¨πŸ‡­ Bern | 601 | 1953 | | 55 | [UNICC](https://www.tamtam.ai/c/unicc) (unicc.org)
Designs and deploys transformational digital tools and programs, including cybersecurity, data analytics, platform, software, and infrastructure solutions for the UN family and other international organizations. | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Geneva | 581 | 1971 | | 56 | [TeamWork Corporate](https://www.tamtam.ai/c/teamwork-corporate) (teamwork.net)
International consulting group specializing in technology integration, innovation, operational performance improvement, transformation support, and growth for diverse businesses worldwide. | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Geneva | 574 | | | 57 | [WRD](https://www.tamtam.ai/c/wrd) (wellroundeddesign.com)
An independent brand design agency specializing in creating well-designed environments for brands, helping them grow and succeed in competitive markets | Advertising Services | πŸ‡¨πŸ‡­ Basel | 547 | 2008 | | 58 | [Unic](https://www.tamtam.ai/c/unic) (unic.com)
The company specializes in making digital solutions user-friendly by combining technology and user needs They focus on innovation, collaboration, and measurable results for various clients | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Zurich | 542 | 1996 | | 59 | [Axians in Switzerland](https://www.tamtam.ai/c/axians-in-switzerland) (axians.ch)
Provider of ICT and telecommunications solutions, focusing on driving digital transformation for organizations through consulting, implementation, and customized services with a human touch | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Schlieren | 538 | | | 60 | [Careanesth](https://www.tamtam.ai/c/careanesth) (careanesth.com)
Specialized job placement agency in the Swiss healthcare sector, connecting job seekers and employers in medical professions since 1999 Focus on nursing, midwifery, radiology, and anesthesiology | Staffing and Recruiting | πŸ‡¨πŸ‡­ Zurich | 533 | 1999 | | 61 | [ti&m](https://www.tamtam.ai/c/ti-and-m) (ti8m.com)
A Swiss company specializing in digitalization, security, and innovation projects, integrating value creation for clients in Europe and Asia | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Zurich | 521 | 2005 | | 62 | [Herzog & de Meuron](https://www.tamtam.ai/c/herzog-and-de-meuron) (herzogdemeuron.com)
Design and development of diverse architectural projects including museums, stadiums, hospitals, offices, laboratories, and residential buildings worldwide. | Architecture and Planning | πŸ‡¨πŸ‡­ Basel | 499 | 1978 | | 63 | [WSP in Switzerland](https://www.tamtam.ai/c/wsp-in-switzerland) (wsp.com)
A company specializing in prestigious projects in transportation, energy, and sustainable development, committed to decarbonizing construction and driving digital transformation Join us! | Civil Engineering | πŸ‡¨πŸ‡­ Lausanne | 498 | 1954 | | 64 | [Kellerhals Carrard](https://www.tamtam.ai/c/kellerhals-carrard) (kellerhals-carrard.ch)
Provides extensive legal advice and representation across various sectors including corporate, financial, tax, public, and international law. | Legal Services | πŸ‡¨πŸ‡­ Basel | 496 | 1885 | | 65 | [Tenthpin](https://www.tamtam.ai/c/tenthpin) (tenthpin.com)
A global boutique consultancy specializing in Life Sciences, providing digital impact and transformational change through industry, process, and IT expertise | Business Consulting and Services | πŸ‡¨πŸ‡­ Basel | 494 | 2017 | | 66 | [EBP Schweiz](https://www.tamtam.ai/c/ebp-schweiz) (ebp.ch)
Providing independent consulting, planning, and construction services focused on sustainable development and innovative solutions for complex environmental challenges. | Business Consulting and Services | πŸ‡¨πŸ‡­ Zurich | 493 | 1981 | | 67 | [OBT AG](https://www.tamtam.ai/c/obt-ag) (obt.ch)
Providing comprehensive consulting services in trust, auditing, IT, tax, and legal matters, aiming to exceed customer needs with personalized, responsible, and passionate approach | Accounting | πŸ‡¨πŸ‡­ St. Gallen | 491 | | | 68 | [BRS Shipbrokers](https://www.tamtam.ai/c/brs-shipbrokers) (brsshipbrokers.com)
Global full-service ship broking firm offering services in shipbroking, carbon markets advisory, freight derivatives, software technology, market intelligence, and maritime consulting | Maritime Transportation | πŸ‡¨πŸ‡­ Geneva | 463 | 1856 | | 69 | [Hotelis](https://www.tamtam.ai/c/hotelis) (hotelis.ch)
Leading Swiss hospitality and catering recruitment agency. Provides temporary and permanent placements, continuous training, and innovative solutions for hotels, public institutions, and independent companies. | Staffing and Recruiting | πŸ‡¨πŸ‡­ Geneva | 462 | 2008 | | 70 | [Forvis Mazars in Switzerland](https://www.tamtam.ai/c/forvis-mazars-in-switzerland) (forvismazars.com)
Integrated partnership providing audit, accountancy, advisory, tax, and legal services in over 100 countries with a global team of 50,000 professionals | Professional Services | πŸ‡¨πŸ‡­ Geneva | 458 | 1975 | | 71 | [Lenz & Staehelin](https://www.tamtam.ai/c/lenz-and-staehelin) (lenzstaehelin.com)
Specializes in Swiss business law, partnering globally to provide expert legal advice and representation for domestic and international clients. | Law Practice | πŸ‡¨πŸ‡­ Zurich | 456 | | | 72 | [Walder Wyss Ltd.](https://www.tamtam.ai/c/walder-wyss-ltd) (walderwyss.com)
Swiss law firm specializing in corporate, banking, intellectual property, dispute resolution, and tax law Offers personalized legal and tax advisory services nationally and internationally | Law Practice | πŸ‡¨πŸ‡­ Zurich | 455 | 1972 | | 73 | [Naef Immobilier](https://www.tamtam.ai/c/naef-immobilier) (naef.ch)
Manages various real estate services including sales, rentals, property management, and commercial property, operating across French-speaking Switzerland since 1881. | Real Estate | πŸ‡¨πŸ‡­ GenΓ¨ve 6 | 437 | 1881 | | 74 | [Pemsa](https://www.tamtam.ai/c/pemsa) (pemsa.ch)
Recruitment and placement of skilled staff in construction, specializing in electricity and structural work across Switzerland with local agency support. | Staffing and Recruiting | πŸ‡¨πŸ‡­ Lutry | 433 | 1980 | | 75 | [Qim info](https://www.tamtam.ai/c/qim-info) (qiminfo.ch)
Specializes in IT recruitment and career development, supporting professionals across various tech roles with long-term career growth. | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Carouge | 432 | 2004 | | 76 | [D-ploy GmbH](https://www.tamtam.ai/c/d-ploy-gmbh) (d-ploy.ch)
Provides IT engineering, consulting services, and solutions for global and regional companies, focusing on operational IT infrastructure and management expertise, enabling business value. | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Kaiseraugst | 422 | 2003 | | 77 | [KESSLER](https://www.tamtam.ai/c/kessler) (kessler.ch)
Leading Swiss enterprise specializing in risk, insurance, and pension fund consulting for over 1,000 Swiss companies, providing expertise, quality service, and long-term client success | Business Consulting and Services | πŸ‡¨πŸ‡­ Zurich | 420 | 1915 | | 78 | [Kenes Group](https://www.tamtam.ai/c/kenes-group) (kenes-group.com)
Global provider for medical and scientific meetings through professional congress organization and association management, delivering international expertise with local know-how across four continents. | Events Services | πŸ‡¨πŸ‡­ Geneva | 418 | 1965 | | 79 | [Amberg Group](https://www.tamtam.ai/c/amberg-group) (amberggroup.com)
Provides comprehensive engineering, consulting, and specialized equipment and software solutions for underground structures like railway, road, and metro tunnels. | Civil Engineering | πŸ‡¨πŸ‡­ Regensdorf | 412 | 1966 | | 80 | [Kudelski Security](https://www.tamtam.ai/c/kudelski-security) (kudelskisecurity.com)
Providing cybersecurity consulting, technology, managed security services, and custom innovation to reduce risk and enhance security effectiveness. | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Cheseaux | 384 | 2012 | | 81 | [Helbling Technik](https://www.tamtam.ai/c/helbling-technik) (helbling.ch)
A leader in tech innovation & business consulting, supporting international clients in product development & business processes through high-performance teams & modern engineering tools | Engineering Services | πŸ‡¨πŸ‡­ Zurich | 374 | 1963 | | 82 | [PYTHON](https://www.tamtam.ai/c/python-geneva) (pplex.ch)
This Swiss firm prioritizes high quality, efficiency, and client relationships, offering legal database services and striving for modernity and efficiency | Law Practice | πŸ‡¨πŸ‡­ Geneva | 374 | 1981 | | 83 | [dasteam ag](https://www.tamtam.ai/c/dasteam-ag) (team.jobs)
The company specializes in recruiting and leasing personnel in various industries since 1987, offering qualified consultants with industry expertise | Staffing and Recruiting | πŸ‡¨πŸ‡­ Basel | 370 | 1987 | | 84 | [BΓ€r & Karrer](https://www.tamtam.ai/c/bar-and-karrer) (baerkarrer.ch)
Advising clients on complex transactions, litigation, arbitration, and regulatory matters with offices across major Swiss cities. | Law Practice | πŸ‡¨πŸ‡­ Zurich | 370 | 1969 | | 85 | [Burckhardt](https://www.tamtam.ai/c/burckhardt) (burckhardt.swiss)
A leading independent Swiss architecture and planning company operating internationally, shaping architecture in Switzerland and expanding into the German-speaking market | Architecture and Planning | πŸ‡¨πŸ‡­ Basel | 365 | 1951 | | 86 | [OK JOB SA](https://www.tamtam.ai/c/ok-job-sa) (okjob.ch)
Specialists in permanent and temporary recruitment across Switzerland, with certified ISO quality standards Dedicated team providing HR services in all regions | Human Resources Services | πŸ‡¨πŸ‡­ Lausanne | 361 | 2012 | | 87 | [IFCHOR GALBRAITHS](https://www.tamtam.ai/c/ifchor-galbraiths) (ifchorgalbraiths.com)
A leading global shipbroking company offering competitive chartering and sale and purchase services, specialized in Dry bulk, Tanker, and Offshore markets | Maritime Transportation | πŸ‡¨πŸ‡­ Lausanne | 354 | | | 88 | [Creative Dock Group](https://www.tamtam.ai/c/creative-dock-group) (creativedock.com)
A global leader in Company Venture Building, creating new services and products for large companies to drive revenue and societal impact | Technology, Information and Internet | πŸ‡¨πŸ‡­ Praha 7 | 353 | 2012 | | 89 | [HOLINGER](https://www.tamtam.ai/c/holinger) (holinger.com)
Innovative engineering and scientific solutions provider with 90 years of experience, offering cost-effective, ecologically forward-looking projects across various fields | Environmental Services | πŸ‡¨πŸ‡­ Liestal | 352 | 1933 | | 90 | [ISC-CX](https://www.tamtam.ai/c/isc-cx) (isc-cx.com)
ISC-CX is a full-service digital customer experience agency with 20+ years of benchmarks, offering comprehensive CX programs and insights from customer data | Market Research | πŸ‡¨πŸ‡­ Basel | 345 | | | 91 | [IOTA GROUP](https://www.tamtam.ai/c/iota-group) (iota-group.com)
Global workforce deployment and local integration services, ensuring compliance, risk mitigation, and seamless project execution across 120+ countries. | Oil and Gas | πŸ‡¨πŸ‡­ Mies | 336 | 1982 | | 92 | [WΓΌest Partner](https://www.tamtam.ai/c/wuest-partner) (wuestpartner.com)
Independent service provider in real estate, offering expertise, data, and digital solutions for decision-making, new perspectives, and sustainable value creation. | Real Estate | πŸ‡¨πŸ‡­ Zurich | 336 | 1985 | | 93 | [Lombardi Engineering Switzerland](https://www.tamtam.ai/c/lombardi-engineering-switzerland) (lombardi.group)
Design, supervision, and monitoring of civil engineering projects worldwide, combining experience and innovation for quality construction and operation. | Civil Engineering | πŸ‡¨πŸ‡­ Bellinzona-Giubiasco | 330 | 1955 | | 94 | [Rapp AG](https://www.tamtam.ai/c/rapp-ag) (rapp.ch)
A multidisciplinary group providing integral solutions in engineering, architecture, and planning fields for sustainable urban development and infrastructure projects worldwide | Architecture and Planning | πŸ‡¨πŸ‡­ Basel | 329 | 1896 | | 95 | [Randstad Switzerland](https://www.tamtam.ai/c/randstad-switzerland) (randstad.ch)
Specialized staffing, recruitment, and HR solutions for temporary, permanent, and executive roles, including innovative tech tools and inhouse services. | Staffing and Recruiting | πŸ‡¨πŸ‡­ Zurich | 328 | 1960 | | 96 | [Milan Rohrer Studio](https://www.tamtam.ai/c/milan-rohrer-studio) (milanrohrer.com)
Swiss industrial design studio specializing in technical product design and transportation design services | Design Services | πŸ‡¨πŸ‡­ Zurich | 327 | 2015 | | 97 | [Schellenberg Wittmer](https://www.tamtam.ai/c/schellenberg-wittmer) (swlegal.com)
Leading Swiss business law firm with 150+ lawyers. Handles transactions, advisory, and disputes for all legal needs, specializing in various areas. | Law Practice | πŸ‡¨πŸ‡­ | 326 | | | 98 | [Chaberton Partners - Executive Search](https://www.tamtam.ai/c/chaberton-partners-executive-search) (chabertonpartners.com)
Specialized in attracting transformative leaders, building C-level teams, and providing exceptional talent and recruitment services for organizations in a changing world | Business Consulting and Services | πŸ‡¨πŸ‡­ Lugano | 325 | 2017 | | 99 | [isolutions AG](https://www.tamtam.ai/c/isolutions-ag) (isolutions.ch)
Specializes in integrating Microsoft services to enhance corporate culture, improve employee and customer experiences, and drive digital transformation. | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Bern | 319 | 1999 | | 100 | [Pini Group](https://www.tamtam.ai/c/pini-group) (arx.ing)
Specialized network providing engineering and design services across infrastructure, energy, industry, and city projects with local and global expertise. | Civil Engineering | πŸ‡¨πŸ‡­ Grono | 318 | 1950 | ## 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. ## More company lists in Switzerland - [The largest companies in Switzerland](https://www.tamtam.ai/l/largest-companies-switzerland) (6,776) - [Multinational companies in Switzerland](https://www.tamtam.ai/l/multinational-companies-switzerland) (1,793) - [Companies with in-house R&D in Switzerland](https://www.tamtam.ai/l/r-and-d-companies-switzerland) (916) - [Financial services firms in Switzerland](https://www.tamtam.ai/l/financial-services-firms-switzerland) (875) - [Manufacturers in Switzerland](https://www.tamtam.ai/l/manufacturers-switzerland) (748) - [Real Estate companies in Switzerland](https://www.tamtam.ai/l/real-estate-companies-switzerland) (637) - [IT Services and IT Consulting companies in Switzerland](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-switzerland) (574) - [Hardware manufacturers in Switzerland](https://www.tamtam.ai/l/hardware-companies-switzerland) (538) - [Financial Services companies in Switzerland](https://www.tamtam.ai/l/financial-services-companies-switzerland) (525) - [IT services companies in Switzerland](https://www.tamtam.ai/l/it-services-companies-switzerland) (438) - [SaaS companies in Switzerland](https://www.tamtam.ai/l/saas-companies-switzerland) (435) - [Retail chains in Switzerland](https://www.tamtam.ai/l/retail-chains-switzerland) (424) - [Software Development companies in Switzerland](https://www.tamtam.ai/l/software-development-companies-switzerland) (380) - [Critical infrastructure operators in Switzerland](https://www.tamtam.ai/l/critical-infrastructure-operators-switzerland) (378) - [Family-owned companies in Switzerland](https://www.tamtam.ai/l/family-owned-companies-switzerland) (346) - [Consulting firms in Switzerland](https://www.tamtam.ai/l/consulting-firms-switzerland) (288) - [Publicly traded companies in Switzerland](https://www.tamtam.ai/l/publicly-traded-companies-switzerland) (262) - [Pharmaceutical companies in Switzerland](https://www.tamtam.ai/l/pharmaceutical-companies-switzerland) (242) - [Property management companies in Switzerland](https://www.tamtam.ai/l/property-management-companies-switzerland) (227) - [Companies with a mobile app in Switzerland](https://www.tamtam.ai/l/companies-with-mobile-app-switzerland) (225) - [Medical Equipment Manufacturing companies in Switzerland](https://www.tamtam.ai/l/medical-equipment-manufacturing-companies-switzerland) (225) - [Medical device companies in Switzerland](https://www.tamtam.ai/l/medical-device-companies-switzerland) (223) - [Investment Management companies in Switzerland](https://www.tamtam.ai/l/investment-management-companies-switzerland) (216) - [Public sector organisations in Switzerland](https://www.tamtam.ai/l/public-sector-organisations-switzerland) (213) ## The same list elsewhere in Switzerland - [Professional services firms in Canton of Zurich](https://www.tamtam.ai/l/professional-services-firms-canton-of-zurich) (128) - [Professional services firms in Vaud](https://www.tamtam.ai/l/professional-services-firms-vaud) (68) - [Professional services firms in Canton of Geneva](https://www.tamtam.ai/l/professional-services-firms-canton-of-geneva) (53) - [Professional services firms in Canton of Zug](https://www.tamtam.ai/l/professional-services-firms-canton-of-zug) (28) - [Professional services firms in Zurich](https://www.tamtam.ai/l/professional-services-firms-zurich) (106) - [Professional services firms in Geneva](https://www.tamtam.ai/l/professional-services-firms-geneva) (44) ## The same list elsewhere - [Professional services firms in the world](https://www.tamtam.ai/l/professional-services-firms-in-the-world) (24,737) - [Professional services firms in Europe](https://www.tamtam.ai/l/professional-services-firms-in-europe) (13,698) --- Source: https://www.tamtam.ai/l/professional-services-firms-switzerland