# Consulting firms headquartered in Rotterdam

Tamtam tracks 41 consulting firms headquartered in Rotterdam. This list ranks the 30 largest by number of employees on LinkedIn, led by CGI Nederland, Moore DRV and Ecorys. Their median headcount is 240. Half of them were founded in 2002 or later.

These Rotterdam-based companies are primarily engaged in consulting and professional services, with a notable presence in IT, financial services, and specialized maritime consulting. The list includes a mix of established firms with decades of experience and more recently founded companies, indicating a dynamic business environment.

Key players include CGI Nederland, a global IT and business consultancy, and Moore DRV, which offers accounting and advisory services. Ecorys specializes in public policy research and consulting, while Schoo & Co. provides specialized services to the insurance, shipping, and offshore industries. SKIM is a global insights agency focusing on decision-making, and valantic NL develops digital solutions and consulting services.

🇳🇱 Rotterdam · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [CGI Nederland](https://www.tamtam.ai/c/cgi-nederland) (cgi.com)<br>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 |
| 2 | [Moore DRV](https://www.tamtam.ai/c/moore-drv) (moore-drv.nl)<br>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 |
| 3 | [Ecorys](https://www.tamtam.ai/c/ecorys) (ecorys.com)<br>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 |
| 4 | [Schoo & Co.](https://www.tamtam.ai/c/schoo-and-co) (schooco.nl)<br>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 |
| 5 | [VPS](https://www.tamtam.ai/c/vps) (vpsveritas.com)<br>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 |  |
| 6 | [SKIM](https://www.tamtam.ai/c/skim) (skimgroup.com)<br>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 |
| 7 | [Rua](https://www.tamtam.ai/c/rua) (rua.nu)<br>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 |
| 8 | [valantic NL](https://www.tamtam.ai/c/valantic-nl) (valantic.com)<br>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 |
| 9 | [KOTUG International](https://www.tamtam.ai/c/kotug-international) (kotug.com)<br>A leading international towage and maritime company providing vessel services, training, and consultancy with a focus on innovation and sustainability | Maritime Transportation | 🇳🇱 Rotterdam | 426 |  |
| 10 | [TWD](https://www.tamtam.ai/c/twd) (twd.nl)<br>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 |  |
| 11 | [Ortec Finance](https://www.tamtam.ai/c/ortec-finance) (ortecfinance.com)<br>Provides advanced software models and technology for investment decision making, risk management, and financial planning to global financial institutions. | IT Services and IT Consulting | 🇳🇱 Rotterdam | 399 | 1981 |
| 12 | [Rebel](https://www.tamtam.ai/c/rebel) (rebelgroup.com)<br>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 |
| 13 | [Profource](https://www.tamtam.ai/c/profource) (profource.com)<br>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 |  |
| 14 | [Flo Group, Part of Accenture](https://www.tamtam.ai/c/flo-group-part-of-accenture) (flo-group.com)<br>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 |
| 15 | [Brink \| bouw, infra en vastgoed](https://www.tamtam.ai/c/brink-bouw-infra-en-vastgoed) (brink.nl)<br>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 |
| 16 | [Ecclesia Risk & Benefits](https://www.tamtam.ai/c/ecclesia-risk-and-benefits) (ecclesia.nl)<br>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 |  |
| 17 | [Marsh Netherlands](https://www.tamtam.ai/c/marsh-netherlands) (marsh.nl)<br>A global risk advisor and insurance broker focused on helping clients navigate complex environments and achieve positive outcomes through data-driven solutions | Insurance | 🇳🇱 Rotterdam | 190 | 1720 |
| 18 | [Rho Adviseurs](https://www.tamtam.ai/c/rho-adviseurs) (rho.nl)<br>Rho advisors for living space excel in navigating Dutch spatial challenges, balancing interests, and delivering practical, reliable planning solutions Connect via website or Twitter | Architecture and Planning | 🇳🇱 Rotterdam | 185 | 2013 |
| 19 | [Ciphix](https://www.tamtam.ai/c/ciphix) (ciphix.io)<br>A tech-savvy company solving business challenges through practical solutions Specializing in simplifying complex processes with expertise in IT and business operations | IT Services and IT Consulting | 🇳🇱 Rotterdam | 154 | 2018 |
| 20 | [The Offshore Partners BV](https://www.tamtam.ai/c/the-offshore-partners-bv) (theoffshorepartners.com)<br>The Offshore Partners provides technical and project management services for offshore energy projects, vessel new-builds, and operational support services | Industrial Machinery Manufacturing | 🇳🇱 Rotterdam | 104 | 2004 |
| 21 | [Dux Group](https://www.tamtam.ai/c/dux-group) (duxgroup.nl)<br>Consulting services in data, security, cloud infrastructure, and process management to fully utilize talent and support digital transformation. | Business Consulting and Services | 🇳🇱 Rotterdam | 77 |  |
| 22 | [Shared \| Boosters of progression](https://www.tamtam.ai/c/shared-boosters-of-progression) (shared.nl)<br>This company helps organizations improve efficiency, modernize digital work environments, achieve goals, and ensure relevancy by deploying scarce talent and innovative digital solutions | Information Services | 🇳🇱 Rotterdam | 68 | 2015 |
| 23 | [Finalise](https://www.tamtam.ai/c/finalise) (finalise.nl)<br>Finalise is a team of enthusiastic consultants specializing in finance, control, subsidies, and SAP, offering unique pragmatic solutions for efficient business processes | Financial Services | 🇳🇱 Rotterdam | 59 |  |
| 24 | [AF Advisors](https://www.tamtam.ai/c/af-advisors) (af-advisors.nl)<br>Consultancy boutique providing tailored investment, organizational, regulatory, structuring, and strategy solutions for asset owners and financial institutions. | Financial Services | 🇳🇱 Rotterdam | 58 | 2008 |
| 25 | [Better Future](https://www.tamtam.ai/c/better-future) (better-future.com)<br>This social impact consulting firm helps clients embed social commitments into strategic agendas through systemic change, leadership development, and organizational psychology | Business Consulting and Services | 🇳🇱 Rotterdam | 57 | 2003 |
| 26 | [AllChiefs](https://www.tamtam.ai/c/allchiefs) (allchiefs.nl)<br>A consultancy prioritizing people and sustainability, building future-proof organizations with expertise in strategy, data, and impact-driven transformations for successful outcomes | Business Consulting and Services | 🇳🇱 Rotterdam | 45 | 2018 |
| 27 | [HDI Risk Consulting (HRC)](https://www.tamtam.ai/c/hdi-risk-consulting-hrc) (hrc-services.nl)<br>HRC provides risk consulting services to businesses worldwide, offering expertise in analyzing and reducing a wide range of risks to improve business continuity | Insurance | 🇳🇱 Rotterdam | 41 |  |
| 28 | [Tech Consulting Group](https://www.tamtam.ai/c/tech-consulting-group) (erasmusconsulting.io)<br>Aiming to assist startups and scale-ups, our company offers consultancy services to address business challenges, connect technology with growth opportunities, and provide hands-on experience for students | Business Consulting and Services | 🇳🇱 Rotterdam | 39 | 2020 |
| 29 | [Deg \| thuis in projectbeheersing](https://www.tamtam.ai/c/deg-thuis-in-projectbeheersing) (deggroep.nl)<br>A specialized consultancy providing project management advice and training, connecting talented individuals with technical companies, focusing on experience, knowledge, and quality | Business Consulting and Services | 🇳🇱 Rotterdam | 37 | 1992 |
| 30 | [DZP. Partner in publiek en privaat](https://www.tamtam.ai/c/dzp-partner-in-publiek-en-privaat) (dzp.nl)<br>An innovative consulting firm specializing in urban development, sustainability, and economic growth by connecting entrepreneurs, governments, and communities for transformative solutions | Business Consulting and Services | 🇳🇱 Rotterdam | 26 | 2001 |

## 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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## The same list elsewhere in Netherlands

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- [Consulting firms in Utrecht](https://www.tamtam.ai/l/consulting-firms-utrecht) (74)

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Source: https://www.tamtam.ai/l/consulting-firms-rotterdam