This selection of professional services firms in Rotterdam includes a mix of established companies and those founded more recently. Key players include OMA, an international architecture practice, Zorgwerk, specializing in healthcare staffing, Robeco, an asset manager focused on sustainable investing, and CGI Nederland, a global IT and business consultancy. Other notable firms are Bilfinger België & Nederland, providing industrial maintenance, and Moore DRV, accountants and advisors.
A clear pattern among these firms is their strong presence in the financial services sector, with companies like Robeco, Moore DRV, and GGN. Additionally, Rotterdam shows a concentration of staffing and recruiting agencies such as Zorgwerk, TOS People, and Daan, indicating a robust support system for various industries.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 1,905 | ||||
| 2 |
Zorgwerkzorgwerk.nl
Specializing in staffing solutions for the healthcare sector, providing excellent service to match supply and demand, with a focus on values like happiness and connectedness |
1,806 | |||
| 3 |
Robecorobeco.com
An international asset manager specializing in sustainable investing, offering active investment strategies for institutional and private investors across various asset classes |
1,482 | |||
| 4 |
CGI Nederlandcgi.com
Established in 1976, a global leader in IT and business consultancy, offering insights and results-driven solutions across 21 industries worldwide |
1,435 | |||
| 5 |
Bilfinger België & Nederlandbilfinger.com
Industrial benchmark for projects and maintenance of industrial assets, ensuring safety and availability for clients in Belgium and the Netherlands Services include insulation, scaffolding, and more |
1,354 | |||
| 6 |
Moore DRVmoore-drv.nl
Accountants and advisors supporting entrepreneurs in the real economy with expert insights, solutions, and support for lasting improvements in business performance |
1,335 | |||
| 7 |
Customs Support Groupcustomssupport.com
Leading European provider of customs and trade solutions enhancing cross-border operations, compliance, cost optimization, and operational efficiency. |
1,037 | |||
| 8 |
Ecorysecorys.com
This company provides research, consulting, communications, and management services to develop, deliver, and evaluate public policy on an international scale |
954 | |||
| 9 |
TOS Peopletospeople.com
A family-owned maritime services provider offering selection, secondment, payroll, and training for various industries worldwide, focusing on people and quality service |
763 | |||
| 10 | 720 | ||||
| 11 |
MetrixLabtolunacorporate.com
Global market research and insights provider challenging industry norms with technology and expert-driven solutions for brand impact and sustainable growth worldwide |
662 | |||
| 12 | 656 | ||||
| 13 |
Schoo & Co.schooco.nl
A global consulting firm offering specialized services to insurance, shipping, and off-shore industries with a focus on expertise, sustainability, and client-centric approach |
629 | |||
| 14 |
VPSvpsveritas.com
A global leader in maritime decarbonisation advisory services, providing innovative testing and inspection solutions to optimize performance while reducing environmental impact |
561 | |||
| 15 |
DC
Multidisciplinary design agency specializing in developing visual identities for print and web, serving diverse clients in art, culture, brands, education, and government sectors |
532 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
SKIMskimgroup.com
Global insights agency specializing in understanding decision-making for consumers, healthcare, and B2B professionals Offers practical marketing solutions through rigorous research techniques |
513 | |||
| 17 | 500 | ||||
| 18 |
valantic NLvalantic.com
Develops digital solutions, consulting services, and software, focusing on e-business, digital commerce, and marketing to integrate digital channels for client growth. |
478 | |||
| 19 |
Flanderijnflanderijn.nl
A leading organization in debt collection and enforcement, offering quality and results-driven services with a strong presence in the Netherlands, Belgium, and Luxembourg |
456 | |||
| 20 |
Carrière Uitzendbureaucarriere.com
Committed to improving organizational performance, Carrière focuses on HR processes and values customer satisfaction, knowledge sharing, and top-notch service provision |
453 | |||
| 21 |
Cardanocardano.nl
An investment management and advisory business focusing on risk and sustainability, supporting pension schemes to secure resilient financial outcomes for savers and society |
448 | |||
| 22 |
Visser & Visservisser-visser.nl
A team of specialists at this company assists with international business ventures in the Netherlands, providing expertise in tax, employment law, and finance Through PrimeGlobal, they offer global support |
434 | |||
| 23 | 406 | ||||
| 24 |
Recruitment Companyrecruitmentcompany.nl
Specializing in management search for industries such as technical, production, food, and logistics, recruiting talented managers with 5+ years experience and bachelor/master degrees |
389 | |||
| 25 | 370 | ||||
| 26 |
Rebelrebelgroup.com
Development and advisory of public-private partnerships, innovative financing, project delivery, investment management, and strategic consulting across sustainability and social sectors. |
346 | |||
| 27 |
Profourceprofource.com
Profource is a service-oriented Oracle specialist with nearly 300 professionals, offering expertise in Finance & ERP to optimize, manage, and utilize Oracle Applications effectively |
265 | |||
| 28 |
Flo Group, Part of Accentureflo-group.com
A global team working with organizations to optimize logistics performance, drive business transformation, and deliver value through supply chain solutions |
251 | |||
| 29 |
Brink | bouw, infra en vastgoedbrink.nl
A company in the heart of construction, infrastructure, and real estate, providing management services, software products, and financial solutions with a diverse team and expertise |
240 | |||
| 30 |
Ecclesia Risk & Benefitsecclesia.nl
Ecclesia is a consultancy and business service provider specializing in risk management, employee benefits, and insurance for a wide range of organizations |
239 | |||
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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 11, 2026.
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- Software Development companies in Rotterdam 59
- SaaS companies in Rotterdam 55
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- Financial services firms in Rotterdam 31
- IT Services and IT Consulting companies in Rotterdam 30
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- AI companies in Rotterdam 27
- Healthcare providers in Rotterdam 27
- Companies with in-house R&D in Rotterdam 26
- Companies with a mobile app in Rotterdam 26
- IT services companies in Rotterdam 26
The same list elsewhere in Netherlands
- Professional services firms in the Netherlands 739
- Professional services firms in North Holland 207
- Professional services firms in South Holland 145
- Professional services firms in North Brabant 106
- Professional services firms in Gelderland 44
- Professional services firms in Overijssel 34
- Professional services firms in Amsterdam 153
- Professional services firms in Utrecht 80
- Professional services firms in Eindhoven 26