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Professional services firms headquartered in Rotterdam

Tamtam tracks 61 professional services firms headquartered in Rotterdam. This list ranks the 30 largest by number of employees on LinkedIn, led by OMA, Zorgwerk and Robeco. Their median headcount is 532. Half of them were founded in 1993 or later.

🇳🇱 Rotterdam30 companiesUpdated Nov 11, 2026

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.

#CompanyIndustryHeadquarters EmployeesFounded
1
OMAoma.com

International architecture practice with a research and design studio, led by eight partners, known for innovative buildings worldwide, with offices in multiple cities

Architecture and Planning 🇳🇱 Rotterdam 1,905 1975
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

Staffing and Recruiting 🇳🇱 Rotterdam 1,806 1997
3
Robecorobeco.com

An international asset manager specializing in sustainable investing, offering active investment strategies for institutional and private investors across various asset classes

Financial Services 🇳🇱 Rotterdam 1,482 1929
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

IT Services and IT Consulting 🇳🇱 Rotterdam 1,435 1976
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

Commercial and Industrial Machinery Maintenance 🇳🇱 Rotterdam 1,354 1950
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

Financial Services 🇳🇱 Rotterdam 1,335 1922
7
Customs Support Groupcustomssupport.com

Leading European provider of customs and trade solutions enhancing cross-border operations, compliance, cost optimization, and operational efficiency.

International Trade and Development 🇳🇱 Rotterdam 1,037 1999
8
Ecorysecorys.com

This company provides research, consulting, communications, and management services to develop, deliver, and evaluate public policy on an international scale

Research Services 🇳🇱 Rotterdam 954 1929
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

Staffing and Recruiting 🇳🇱 Rotterdam 763 1992
10
GGNggn.nl

GGN is the largest debt collection and bailiff company in the Netherlands, focusing on helping individuals with financial difficulties while ensuring businesses get paid

Financial Services 🇳🇱 Rotterdam 720 2002
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

Market Research 🇳🇱 Rotterdam 662 1999
12
Daandaan.eu

A company that matches individuals with passion and ambition to suitable jobs in healthcare, education, and social security through personalized support and development opportunities

Staffing and Recruiting 🇳🇱 Rotterdam 656 2012
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

Maritime Transportation 🇳🇱 Rotterdam 629 1940
14
VPSvpsveritas.com

A global leader in maritime decarbonisation advisory services, providing innovative testing and inspection solutions to optimize performance while reducing environmental impact

Professional Services 🇳🇱 Rotterdam 561 n/a
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

Design Services 🇳🇱 Rotterdam 532 1999

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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

Business Consulting and Services 🇳🇱 Rotterdam 513 1979
17
Ruarua.nu

RUA is a consultancy specializing in environmental management and participation, providing support in communication, stakeholder engagement, and community relations

Public Relations and Communications Services 🇳🇱 Rotterdam 500 2021
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.

Business Consulting and Services 🇳🇱 Rotterdam 478 1992
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

Financial Services 🇳🇱 Rotterdam 456 1948
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

Staffing and Recruiting 🇳🇱 Rotterdam 453 2010
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

Financial Services 🇳🇱 Rotterdam 448 2000
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

Financial Services 🇳🇱 Rotterdam 434 1989
23
TWDtwd.nl

Providing custom-designed solutions for offshore and heavy civil installation projects, including innovations, seafastening structures, lifting tools, and more Contact us for practical solutions 24/7

Civil Engineering 🇳🇱 Rotterdam 406 n/a
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

Staffing and Recruiting 🇳🇱 Rotterdam 389 1999
25
MVRDVmvrdv.com

A Rotterdam-based architectural firm specializing in innovative and sustainable solutions for urban and architectural projects worldwide through collaborative and research-based design methods

Architecture and Planning 🇳🇱 Rotterdam 370 1993
26
Rebelrebelgroup.com

Development and advisory of public-private partnerships, innovative financing, project delivery, investment management, and strategic consulting across sustainability and social sectors.

Strategic Management Services 🇳🇱 Rotterdam 346 2002
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

Financial Services 🇳🇱 Rotterdam 265 n/a
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

IT Services and IT Consulting 🇳🇱 Rotterdam 251 2007
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

Business Consulting and Services 🇳🇱 Rotterdam 240 1972
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

Insurance 🇳🇱 Rotterdam 239 n/a

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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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