# Professional services firms headquartered in Zurich Tamtam tracks 106 professional services firms headquartered in Zurich. This list ranks the 30 largest by number of employees on LinkedIn, led by Adecco, The Adecco Group and Egon Zehnder. Their median headcount is 665. Half of them were founded in 1983 or later. This list features large professional services firms in Zurich, predominantly in financial services and business consulting. Noteworthy companies include Adecco, a top provider of HR solutions, and PwC Switzerland, which offers assurance, advisory, and tax services. Vontobel helps clients invest their financial capital. The data shows a concentration of established firms, with several founded in the early to mid-20th century, such as PwC Switzerland (1912) and Vontobel (1924). The largest companies, like Adecco and The Adecco Group, highlight Zurich's role in global human resources services. πŸ‡¨πŸ‡­ Zurich Β· 30 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 | [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 | | | 3 | [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 | | 4 | [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 | | | 5 | [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 | | 6 | [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 | | 7 | [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 | | | 8 | [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 | | 9 | [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 | | 10 | [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 | | | 11 | [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 | | 12 | [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 | | 13 | [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 | | | 14 | [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 | | 15 | [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 | | 16 | [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 | | | 17 | [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 | | | 18 | [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 | | 19 | [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 | | 20 | [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 | | 21 | [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 | | 22 | [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 | | | 23 | [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 | | 24 | [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 | | 25 | [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 | | 26 | [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 | | 27 | [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 | | 28 | [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 | | 29 | [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 | | 30 | [Sixsentix](https://www.tamtam.ai/c/sixsentix) (sixsentix.com)
A leading provider of Software Testing Services with Visual Analytics and Reporting, helping enterprises accelerate their Software Delivery for faster time-to-market | IT Services and IT Consulting | πŸ‡¨πŸ‡­ Zurich | 276 | 2013 | ## 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 Zurich - [The largest companies in Zurich](https://www.tamtam.ai/l/largest-companies-zurich) (1,143) - [Multinational companies in Zurich](https://www.tamtam.ai/l/multinational-companies-zurich) (277) - [Financial services firms in Zurich](https://www.tamtam.ai/l/financial-services-firms-zurich) (243) - [Financial Services companies in Zurich](https://www.tamtam.ai/l/financial-services-companies-zurich) (174) - [Real Estate companies in Zurich](https://www.tamtam.ai/l/real-estate-companies-zurich) (140) - [SaaS companies in Zurich](https://www.tamtam.ai/l/saas-companies-zurich) (122) - [Software Development companies in Zurich](https://www.tamtam.ai/l/software-development-companies-zurich) (96) - [IT Services and IT Consulting companies in Zurich](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-zurich) (94) - [Companies with in-house R&D in Zurich](https://www.tamtam.ai/l/r-and-d-companies-zurich) (91) - [Consulting firms in Zurich](https://www.tamtam.ai/l/consulting-firms-zurich) (77) - [Investment Management companies in Zurich](https://www.tamtam.ai/l/investment-management-companies-zurich) (63) - [IT services companies in Zurich](https://www.tamtam.ai/l/it-services-companies-zurich) (62) - [Critical infrastructure operators in Zurich](https://www.tamtam.ai/l/critical-infrastructure-operators-zurich) (56) - [Publicly traded companies in Zurich](https://www.tamtam.ai/l/publicly-traded-companies-zurich) (51) - [Advertising Services companies in Zurich](https://www.tamtam.ai/l/advertising-services-companies-zurich) (50) - [Retail chains in Zurich](https://www.tamtam.ai/l/retail-chains-zurich) (46) - [Companies with a mobile app in Zurich](https://www.tamtam.ai/l/companies-with-mobile-app-zurich) (42) - [Property management companies in Zurich](https://www.tamtam.ai/l/property-management-companies-zurich) (41) - [AI companies in Zurich](https://www.tamtam.ai/l/ai-companies-zurich) (36) - [Education providers in Zurich](https://www.tamtam.ai/l/education-companies-zurich) (35) - [Manufacturers in Zurich](https://www.tamtam.ai/l/manufacturers-zurich) (35) - [Venture capital and private equity firms in Zurich](https://www.tamtam.ai/l/vc-and-private-equity-firms-zurich) (35) - [AI-native companies in Zurich](https://www.tamtam.ai/l/ai-native-companies-zurich) (33) - [Subscription businesses in Zurich](https://www.tamtam.ai/l/subscription-businesses-zurich) (32) ## The same list elsewhere in Switzerland - [Professional services firms in Switzerland](https://www.tamtam.ai/l/professional-services-firms-switzerland) (402) - [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 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-zurich