# List of professional services firms in Gelderland

Tamtam tracks 44 professional services firms headquartered in Gelderland. This list ranks all of them by number of employees on LinkedIn, led by Sendiri, Flynth and House of Covebo. Their median headcount is 131. Half of them were founded in 2002 or later. The most common headquarters are Arnhem (12), Apeldoorn (5) and Nijkerk (4).

The professional services sector in Gelderland features a mix of large and mid-sized firms, with a notable presence of companies established in the early 2000s and more recently. Sendiri, founded in 2018, specializes in online learning and development consultancy, while Flynth provides accounting and advisory services. House of Covebo and Covebo Uitzendgroep focus on staffing and international recruitment, and EIFFEL offers business consulting in legal, finance, and process. DEKRA Nederland is involved in safety and sustainability through testing and certification.

The companies in this list primarily concentrate on professional training, accounting, staffing, and business consulting. A significant number of these firms, including Sendiri and Jua Kali, were founded around 2018, indicating a recent growth spurt in specific service areas within the region.

🇳🇱 Gelderland · 44 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Sendiri](https://www.tamtam.ai/c/sendiri) (sendiri.nl)<br>Learning and development consultancy specializing in online programs, community support, and guidance to empower individuals and organizations in enhancing skills and knowledge | Professional Training and Coaching | 🇳🇱 Eefde | 15,445 | 2018 |
| 2 | [Flynth](https://www.tamtam.ai/c/flynth) (flynth.nl)<br>A leading Dutch accounting and advisory service provider focused on entrepreneurs, with a unique organizational structure and passionate, team-oriented employees | Accounting | 🇳🇱 Arnhem | 1,842 |  |
| 3 | [House of Covebo](https://www.tamtam.ai/c/house-of-covebo) (houseofcovebo.nl)<br>House of Covebo is a group of international recruitment companies sharing the mission of providing excellent job opportunities and support to clients | Staffing and Recruiting | 🇳🇱 Nijkerk | 1,561 |  |
| 4 | [EIFFEL](https://www.tamtam.ai/c/eiffel) (eiffel.nl)<br>Specializing in tailored, results-driven solutions in Legal, Finance, and Process, with partnerships in IT and HR, bringing added value through a competitive mindset | Business Consulting and Services | 🇳🇱 Arnhem | 1,377 | 1992 |
| 5 | [DEKRA Nederland](https://www.tamtam.ai/c/dekra-nederland) (dekra.nl)<br>DEKRA ensures safety and sustainability through testing, inspecting, and certifying products, processes, and environments to promote trust and reliability | Public Safety | 🇳🇱 Arnhem | 1,307 |  |
| 6 | [Covebo Uitzendgroep](https://www.tamtam.ai/c/covebo-uitzendgroep) (covebo.nl)<br>A company specializing in international labor mediation, focusing on construction, engineering, production, logistics, and healthcare sectors Committed to excellent service with a personal touch | Staffing and Recruiting | 🇳🇱 Nijkerk | 601 | 2001 |
| 7 | [Jua Kali](https://www.tamtam.ai/c/jua-kali) (juakali.nl)<br>JUA KALI offers tailored accounting services to help businesses improve performance through expert advice, clear communication, and practical solutions | Business Consulting and Services | 🇳🇱 Nunspeet | 584 | 2018 |
| 8 | [ZZP](https://www.tamtam.ai/c/zzp) (bebebertels.nl)<br>Providing occupational health services to various organizations, offering advice to both companies and employees to enhance problem-solving capabilities | Medical Practices | 🇳🇱 Varik | 564 | 2007 |
| 9 | [Perspectief](https://www.tamtam.ai/c/perspectief) (perspectief.eu)<br>Perspectief is a family business challenging clients to invest in employee vitality and organizational well-being, creating a safe, healthy, and resilient work environment | Human Resources Services | 🇳🇱 Harderwijk | 559 | 2002 |
| 10 | [Quintes Verzekeren en Risicobeheer](https://www.tamtam.ai/c/quintes-verzekeren-en-risicobeheer) (quintes.nl)<br>Quintes provides personalized and expert advice on risk and insurance, building trust through understanding and efficient recommendations for reliable coverage | Financial Services | 🇳🇱 Waardenburg | 416 | 2012 |
| 11 | [NTP](https://www.tamtam.ai/c/ntp) (ntp.nl)<br>Collaborating with government, businesses, and organizations to create functional, healthier, and sustainable environments through infrastructure and environmental solutions | Civil Engineering | 🇳🇱 Hattem | 373 | 1997 |
| 12 | [Accon avm](https://www.tamtam.ai/c/accon-avm) (flynth.nl)<br>Flynth supports entrepreneurs in maximizing their business potential through a nationwide network of advisors and accountants, offering top-notch advice | Financial Services | 🇳🇱 Arnhem | 273 | 1917 |
| 13 | [Delphy](https://www.tamtam.ai/c/delphy) (delphy.nl)<br>Develops and implements knowledge for crop cultivation, advising growers, implementing concepts, providing training, and managing turnkey projects for agriculture and horticulture. | Farming | 🇳🇱 Wageningen | 269 | 1999 |
| 14 | [ABT bv](https://www.tamtam.ai/c/abt-bv) (abt.eu)<br>ABT is an independent engineering firm adding value to the built environment through multidisciplinary expertise in design, construction, and management for sustainable solutions worldwide | Construction | 🇳🇱 Arnhemsestraatweg 358 | 258 | 1953 |
| 15 | [MedWay](https://www.tamtam.ai/c/medway-nijkerk) (medwayzorg.nl)<br>MedWay is a progressive organization revolutionizing the healthcare sector, offering diverse job opportunities with a focus on personalized service and professional development | Hospitals and Health Care | 🇳🇱 Nijkerk | 254 | 2001 |
| 16 | [Qlip B.V. - Quality Assurance in Dairy](https://www.tamtam.ai/c/qlip-b-v-quality-assurance-in-dairy) (qlip.com)<br>The company provides independent quality assurance services for the dairy industry, conducting audits, analyses, and trainings to optimize processes and ensure safety | Dairy Product Manufacturing | 🇳🇱 Zutphen | 225 | 2007 |
| 17 | [Alfa Accountants en Adviseurs](https://www.tamtam.ai/c/alfa-accountants-en-adviseurs) (aaff.nl)<br>Alfa Accountants en Adviseurs provides accounting and business advisory services with over 1,000 specialists nationwide, offering local expertise and support for small and medium-sized businesses | Accounting | 🇳🇱 Wageningen | 225 |  |
| 18 | [TCPM](https://www.tamtam.ai/c/tcpm) (tcpm.nl)<br>Independent engineering and advisory firm with over 25 years of experience, offering expertise in engineering, industrial safety, and project management across various industries | Industrial Machinery Manufacturing | 🇳🇱 Apeldoorn | 191 | 1990 |
| 19 | [BonsenReuling Accountants & Adviseurs](https://www.tamtam.ai/c/bonsenreuling-accountants-and-adviseurs) (bonsenreuling.nl)<br>BonsenReuling provides comprehensive financial, tax, and legal services, empowering clients to see the bigger picture and make informed decisions for their future growth | Financial Services | 🇳🇱 Lichtenvoorde | 184 | 1923 |
| 20 | [Inspiro](https://www.tamtam.ai/c/inspiro) (inspiro.nl)<br>This company offers support in applying microelectronics and software, cloud communication, security protocols, and complete product development to enhance productivity and gain competitive advantage | IT Services and IT Consulting | 🇳🇱 Arnhem | 184 | 2002 |
| 21 | [NRG-Office](https://www.tamtam.ai/c/nrg-office) (nrg-office.nl)<br>Specializing in connecting businesses and professionals in the food and manufacturing industry supply chain through recruitment, selection, and placement services since 2006 | Staffing and Recruiting | 🇳🇱 Nijmegen | 183 | 2006 |
| 22 | [Javra Software](https://www.tamtam.ai/c/javra-software) (javra.com)<br>Develops future proof custom business applications, mobile apps, and e-commerce solutions while providing modernization, digital transformation, and nearshore R&D services for global clients. | Software Development | 🇳🇱 Culemborg | 131 | 1999 |
| 23 | [Harrows](https://www.tamtam.ai/c/harrows) (harrows.nl)<br>Harrows specializes in providing staffing, management, and training services in the financial and social sector, focusing on top organizations in the Netherlands | Business Consulting and Services | 🇳🇱 Arnhem | 130 | 2000 |
| 24 | [Hezelburcht Grant & Funding Consultancy](https://www.tamtam.ai/c/hezelburcht-grant-and-funding-consultancy) (hezelburcht.com)<br>Hezelburcht provides comprehensive grant support for clients to achieve innovative, sustainable, and societal ambitions through knowledge of regional, national, and European grant programs | Financial Services | 🇳🇱 Nijmegen | 115 | 1995 |
| 25 | [Eminent Groep](https://www.tamtam.ai/c/eminent-groep) (eminentgroep.nl)<br>Eminent connects technical professionals with companies in various engineering sectors, helping them achieve their goals and ambitions through motivation and practical support | Staffing and Recruiting | 🇳🇱 Apeldoorn | 104 | 2009 |
| 26 | [Qserve Group](https://www.tamtam.ai/c/qserve-group) (qservegroup.com)<br>Providing regulatory, clinical, and quality compliance support for medical devices and IVDs, including clinical trials and global market access. | Business Consulting and Services | 🇳🇱 Arnhem | 84 | 1998 |
| 27 | [Energyprofs](https://www.tamtam.ai/c/energyprofs) (energyprofs.nl)<br>The company focuses on people, offering consulting services in energy sector with a sustainable approach, emphasizing leadership, change, innovation, and sustainability | Business Consulting and Services | 🇳🇱 Herveld | 78 | 2002 |
| 28 | [PYRAMIDE](https://www.tamtam.ai/c/pyramide) (pyramide.nl)<br>Leadership coaching, organization, team and life guidance, internationally renowned speaker, author of books, focus on flourishing through the Pyramid approach since 1992 | Executive Offices | 🇳🇱 Apeldoorn | 66 | 1992 |
| 29 | [ArdoSZ](https://www.tamtam.ai/c/ardosz-nijmegen) (ardosz.nl)<br>ArdoSZ is a partner providing expert medical and vocational support for private social security execution, supporting organizations in managing employee illness and disability effectively | Financial Services | 🇳🇱 Nijmegen | 61 | 2017 |
| 30 | [No Name B.V.](https://www.tamtam.ai/c/no-name-b-v) (weworkworldwide.com)<br>Innovative outsourcing and outstaffing solutions in Pakistan, providing energetic tech talent with top-tier project management skills for enterprises | Software Development | 🇳🇱 Ulft | 60 | 2020 |
| 31 | [Cargo International](https://www.tamtam.ai/c/cargo-international) (car-go.nl)<br>Cargo International is an independent and specialized partner in automotive, import, and export services, with a team dedicated to assisting for over 25 years | Transportation, Logistics, Supply Chain and Storage | 🇳🇱 Apeldoorn | 55 | 1997 |
| 32 | [Inkassier Gerechtsdeurwaarders & Incasso](https://www.tamtam.ai/c/inkassier-gerechtsdeurwaarders-and-incasso) (mgdejong.com)<br>With 40 years of experience, the company offers nationwide debt collection and legal enforcement services to various industries, ensuring efficient and customized solutions | Financial Services | 🇳🇱 Arnhem | 47 |  |
| 33 | [Parell](https://www.tamtam.ai/c/parell) (parell.nl)<br>Parell supports organizations in achieving digital transformation for greater societal impact through services in organization advice, information security, data-driven transformation, always prioritizing human-centered approach | Business Consulting and Services | 🇳🇱 Arnhem | 37 | 2012 |
| 34 | [Chainresult Business Implementation](https://www.tamtam.ai/c/chainresult-business-implementation) (chainresult.com)<br>The company specializes in business implementation for People, Process, and Data, particularly in the context of supply chains, focusing on resilience and efficiency | IT Services and IT Consulting | 🇳🇱 Oosterbeek | 25 | 2001 |
| 35 | [GeoSquare Experts](https://www.tamtam.ai/c/geosquare-experts) (geosquare.nl)<br>Specializing in geospatial consulting, projects, and staffing with 2500 years of combined experience, providing expertise at any location with dedicated employee involvement | IT Services and IT Consulting | 🇳🇱 Wageningen | 21 |  |
| 36 | [PB Consulting](https://www.tamtam.ai/c/pb-consulting) (pbconsulting.nl)<br>Organization providing advice and interim management services, focused on partnership, reliability, quality, and integrity to ensure continuity and achieve definitive results | Business Consulting and Services | 🇳🇱 Nijkerk | 18 | 2010 |
| 37 | [Zorgplan BV](https://www.tamtam.ai/c/zorgplan-bv) (zorgplan.nl)<br>Zorgplan specializes in making changes in the healthcare sector manageable by solving problems, implementing innovative ideas, and leveraging their extensive industry experience | Hospitals and Health Care | 🇳🇱 Doetinchem | 13 |  |
| 38 | [MEER! accountants + adviseurs](https://www.tamtam.ai/c/meer-accountants-adviseurs) (ditismeer.nl)<br>Meer! provides accounting, tax advice, HRM services, and financial planning for businesses and individuals, focusing on personalized, transparent, and professional financial expertise | Financial Services | 🇳🇱 Arnhem | 12 |  |
| 39 | [RONT Management Consultants](https://www.tamtam.ai/c/ront-management-consultants) (rontmanagementconsultants.nl)<br>RONT Management Consultants supports organizations in achieving their societal mission through expertise in Transparent Steering, Values-based Leadership, Auditing, Lean Working, and Transition/Transformation | Business Consulting and Services | 🇳🇱 Apeldoorn | 11 |  |
| 40 | [Beter Koersen Organisatie Ontwikkelaars](https://www.tamtam.ai/c/beter-koersen-organisatie-ontwikkelaars) (beterkoersen.nl)<br>A team of consultants specializing in organizational development, ensuring that clients, organizations, and employees are happy and perform better together | Business Consulting and Services | 🇳🇱 Oosterbeek | 10 | 2012 |
| 41 | [Newid B.V.](https://www.tamtam.ai/c/newid-b-v) (newidconsulting.nl)<br>Your strategic partner for business consulting and planning | Business Consulting and Services | 🇳🇱 Arnhem | 9 |  |
| 42 | [AiiS](https://www.tamtam.ai/c/aiis) (aiis.nl)<br>Future Minds specializes in integrating AI technologies to enhance team efficiency, reduce workload, improve decision-making, and provide training for seamless business growth and innovation | Business Consulting and Services | 🇳🇱 Arnhem-Nijmegen | 5 | 2023 |
| 43 | [Aisy](https://www.tamtam.ai/c/aisy) (meetaisy.nl)<br>Partner for effective AI implementations, accelerating, optimizing, and professionalizing processes through AI tools for added organizational value and accessible AI solutions Join us for a successful future | IT Services and IT Consulting | 🇳🇱 Nijmegen | 4 | 2023 |
| 44 | [HyMatters](https://www.tamtam.ai/c/hymatters) (hymatters.com)<br>HyMatters specializes in enabling a green hydrogen market by using locally generated energy for various applications, supporting the transition to renewable energy systems | Renewables & Environment | 🇳🇱 Arnhem | 2 | 2018 |

## 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 Gelderland

- [The largest companies in Gelderland](https://www.tamtam.ai/l/largest-companies-gelderland) (1,100)
- [Multinational companies in Gelderland](https://www.tamtam.ai/l/multinational-companies-gelderland) (194)
- [Manufacturers in Gelderland](https://www.tamtam.ai/l/manufacturers-gelderland) (105)
- [Companies with in-house R&D in Gelderland](https://www.tamtam.ai/l/r-and-d-companies-gelderland) (101)
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- [Healthcare providers in Gelderland](https://www.tamtam.ai/l/healthcare-providers-gelderland) (86)
- [Critical infrastructure operators in Gelderland](https://www.tamtam.ai/l/critical-infrastructure-operators-gelderland) (82)
- [Hospitals and Health Care companies in Gelderland](https://www.tamtam.ai/l/hospitals-and-health-care-companies-gelderland) (80)
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- [Food and Beverage Manufacturing companies in Gelderland](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-gelderland) (61)
- [Software Development companies in Gelderland](https://www.tamtam.ai/l/software-development-companies-gelderland) (61)
- [Hardware manufacturers in Gelderland](https://www.tamtam.ai/l/hardware-companies-gelderland) (58)
- [Education providers in Gelderland](https://www.tamtam.ai/l/education-companies-gelderland) (53)
- [Truck Transportation companies in Gelderland](https://www.tamtam.ai/l/truck-transportation-companies-gelderland) (53)
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- [Distributors and wholesalers in Gelderland](https://www.tamtam.ai/l/distributors-and-wholesalers-gelderland) (46)
- [Hotel and hospitality groups in Gelderland](https://www.tamtam.ai/l/hospitality-groups-gelderland) (42)
- [IT Services and IT Consulting companies in Gelderland](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-gelderland) (40)
- [Retail companies in Gelderland](https://www.tamtam.ai/l/retail-companies-gelderland) (40)
- [Financial services firms in Gelderland](https://www.tamtam.ai/l/financial-services-firms-gelderland) (36)
- [Wellness and Fitness Services companies in Gelderland](https://www.tamtam.ai/l/wellness-and-fitness-services-companies-gelderland) (36)

## The same list elsewhere in Netherlands

- [Professional services firms in the Netherlands](https://www.tamtam.ai/l/professional-services-firms-netherlands) (739)
- [Professional services firms in North Holland](https://www.tamtam.ai/l/professional-services-firms-north-holland) (207)
- [Professional services firms in South Holland](https://www.tamtam.ai/l/professional-services-firms-south-holland) (145)
- [Professional services firms in North Brabant](https://www.tamtam.ai/l/professional-services-firms-north-brabant) (106)
- [Professional services firms in Overijssel](https://www.tamtam.ai/l/professional-services-firms-overijssel) (34)
- [Professional services firms in Amsterdam](https://www.tamtam.ai/l/professional-services-firms-amsterdam) (153)
- [Professional services firms in Utrecht](https://www.tamtam.ai/l/professional-services-firms-utrecht) (80)
- [Professional services firms in Rotterdam](https://www.tamtam.ai/l/professional-services-firms-rotterdam) (61)
- [Professional services firms in Eindhoven](https://www.tamtam.ai/l/professional-services-firms-eindhoven) (26)

## 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)

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Source: https://www.tamtam.ai/l/professional-services-firms-gelderland