The professional services firms in Overijssel are a mix of engineering, environmental, and financial services companies. Witteveen+Bos is a global engineering and consultancy firm, TAUW Nederland focuses on environmental solutions, and Moore MKW provides accounting and advisory services. Other notable firms include Optica, specializing in coaching and training, and Countus, another accounting and advisory organization.
These firms are predominantly mid-sized to large, with several established decades ago, such as TAUW Nederland (1928) and Countus (1924). There is a clear concentration of headquarters in Deventer and Zwolle, indicating these cities as significant hubs for professional services within Overijssel.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Witteveen+Boswitteveenbos.com
Global engineering and consultancy firm providing sustainable solutions in infrastructure, water, environment, and construction projects worldwide with a focus on value creation and talent development |
1,892 | |||
| 2 |
VIROviro-group.com
Innovative engineering firm specializing in project management and engineering solutions for various industries, enabling clients to achieve their ambitions |
983 | |||
| 3 |
TAUW Nederlandtauw.nl
The company shapes a vital living environment by offering meaningful solutions through strong expertise and valuable partnerships |
840 | |||
| 4 |
Moore MKWmoore-mkw.nl
Moore MKW is a forward-thinking accounting and advisory organization focused on personal happiness, business success, and societal contribution through teamwork and innovation |
769 | |||
| 5 | 766 | ||||
| 6 |
Jobcenterjobcenter.nu
A company specializing in personnel solutions for businesses by providing staffing services in various industries with a focus on quality and problem-solving |
689 | |||
| 7 |
Countuscountus.nl
Countus is an accounting and advisory organization focused on achieving sustainable success for clients, employees, and stakeholders through a wide range of services |
595 | |||
| 8 |
Demcondemcon.com
Develops, prototypes, industrializes, and manufactures high-quality, innovative, and complex systems and products, integrating various engineering fields to solve societal and technological challenges. |
487 | |||
| 9 |
Aveco de Bondtavecodebondt.nl
Aveco de Bondt is a medium-sized, independent engineering company specializing in comprehensive solutions for construction, infrastructure, space, and environment with experienced specialists |
459 | |||
| 10 | 317 | ||||
| 11 |
Goudappelgoudappel.nl
Assists clients making sustainable mobility choices with over 250 diverse experts from traffic consultants to landscape architects, fostering collaboration and diversity. |
315 | |||
| 12 |
Eshuis Accountants en Adviseurseshuis.com
A full-service accounting and tax advisory firm catering to small to medium-sized businesses in Eastern Netherlands Specializing in construction, technology, healthcare sectors |
309 | |||
| 13 |
Global Talkglobaltalk.nl
Global Talk is an organization of 2000 interpreters and cultural specialists, speaking over 200 languages, facilitating communication in various important settings across the Netherlands |
295 | |||
| 14 |
IJssel Technology Servicesijssel.com
Experts in production improvement, offering smart solutions for quick and efficient product development One-stop shop for production, installation, implementation, and maintenance |
268 | |||
| 15 |
Damsté lawyers – civil law notariesdamste.nl
A prominent firm providing legal advice and services in civil law for businesses, institutions, governments, and individuals in the Twente region |
193 | |||
| 16 |
In Personinperson.nl
Specializing in flexible staffing, we prioritize customer and employee happiness With over 20,000 flexible workers, we help clients excel and grow |
190 | |||
| 17 |
Ignite Group Nederlandignite-group.com
Vindsubsidies is a full-service subsidy consultancy with extensive experience in optimizing subsidies for businesses and projects across various industries and sectors |
152 | |||
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| 18 |
Brouwers Accountants & Adviseursbrouwers.nl
A dynamic accounting and advisory firm offering multidisciplinary expertise, a strong network, and a focus on entrepreneurial success for clients and staff |
139 | |||
| 19 |
KroeseWeversmoore-mkw.nl
Multidisciplinary firm in the Netherlands offering personalized accounting, tax, and financial services to diverse entrepreneurial clients, promoting growth and improvement |
112 | |||
| 20 |
FACTO GEOfacto-geo.nl
This company provides geodesic engineering services and geodata processing, including land surveying, GIS updates, 3D modeling, and measurements for various construction and infrastructure projects. |
100 | |||
| 21 |
SMK Accountants & Fiscalistensmkaccountants.nl
The company provides comprehensive accounting services, including administration, auditing, tax advice, and online services, focusing on building long-term relationships and delivering added value |
99 | |||
| 22 |
CMC Worldwidecmcww.com
Credit management company focused on collecting overdue invoices, preventing future delays, and providing tailored services for SMEs and multinational corporations worldwide |
64 | |||
| 23 |
ROZ Groeprozondernemerspunt.nl
Providing support to entrepreneurs in Twente and Achterhoek with advice, coaching, training, financing, and debt relief, since 2005 Encouraging social impact entrepreneurship |
57 | |||
| 24 |
Eurofins | MASERmaserengineering.eu
An independent engineering service company specializing in reliability testing and failure analysis for semiconductor and electronic systems in various industries |
45 | |||
| 25 |
Horequiphorequip.com
A specialist in designing, consulting, managing projects, supplying, and building food service areas, with a focus on creating great guest experiences and functionality |
38 | |||
| 26 |
Blue-Yblue-y.com
Result-oriented advisors in healthcare specializing in implementing technology for future care improvements |
32 | |||
| 27 |
Epartment | Commerce experts.epartment.nl
Innovative e-commerce organization with expertise in marketing, IT, finance systems, design, and technology, delivering tailored solutions for webshops and SAP/Accountview integration |
26 | |||
| 28 |
ABC Pensioenabcpensioen.nl
ABC Pensioen specializes in advising, managing, and communicating pension plans for employers, entrepreneurs, and individuals, ensuring financial security for the future |
14 | |||
| 29 | 10 | ||||
| 30 |
OColavcoaching.com
This company focuses on facilitating personal growth, self-discovery, and achieving goals through coaching based on empathy, intrinsic change, and individualized support |
9 | |||
| 31 |
Flireo B.V.flireo.nl
Flireo specializes in creating AI solutions to exceed expectations, born from expertise and driven by challenges to unlock growth potential with a commitment to excellence |
5 | |||
| 32 |
ProMa Consulting B.V.proma-consulting.nl
ProMa Consulting is an organizational consultancy firm specializing in project and organizational control, policy implementation, quality audits, and specialist teams for various industries |
4 | |||
| 33 |
Zorgadviseurs.nlzorgadviseurs.nl
An association of experienced healthcare professionals focused on innovating and improving healthcare by connecting different sectors and implementing new care concepts |
3 | |||
| 34 |
Exante.aiexante-ai.nl
Specialized in artificial intelligence and data science, we help organizations develop AI strategies, conduct research, provide data-driven advice, and build agile AI teams |
1 | |||
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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.
More company lists in Overijssel
- The largest companies in Overijssel 641
- Multinational companies in Overijssel 101
- Manufacturers in Overijssel 77
- Critical infrastructure operators in Overijssel 54
- Family-owned companies in Overijssel 54
- Retail chains in Overijssel 51
- Hardware manufacturers in Overijssel 48
- Healthcare providers in Overijssel 48
- Logistics companies in Overijssel 47
- Hospitals and Health Care companies in Overijssel 44
- Companies with in-house R&D in Overijssel 41
- Transportation, Logistics, Supply Chain and Storage companies in Overijssel 38
- Truck Transportation companies in Overijssel 37
- Software Development companies in Overijssel 35
- SaaS companies in Overijssel 33
- Education providers in Overijssel 29
- IT services companies in Overijssel 28
- IT Services and IT Consulting companies in Overijssel 27
- Food and Beverage Manufacturing companies in Overijssel 25
- Distributors and wholesalers in Overijssel 25
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 Amsterdam 153
- Professional services firms in Utrecht 80
- Professional services firms in Rotterdam 61
- Professional services firms in Eindhoven 26