# 50 leading professional services firms in Denmark

Tamtam tracks 150 professional services firms headquartered in Denmark. This list ranks the 50 largest by number of employees on LinkedIn, led by ISS A/S, Ramboll and FLSmidth. Their median headcount is 1,227. Half of them were founded in 1980 or later. The most common headquarters are Copenhagen (20) and Aarhus (3).

These Danish professional services companies are mostly large firms, many of them operating globally. They span a range of sectors, including facilities management, engineering, IT consulting, and non-profit organizations. Companies such as ISS A/S, a workplace experience and facility management company, and Ramboll, a global company offering sustainable solutions in architecture, engineering, and consultancy, are prominent examples.

A clear pattern among these companies is their strong presence in Copenhagen, which serves as the headquarters for many, including FLSmidth, a global supplier to the mining and cement industries, and Netcompany, providing agile IT consulting and digital transformation services. Another commonality is their focus on sustainable solutions, as seen with COWI, which creates sustainable solutions to improve quality of life, and UNOPS, supporting humanitarian and development solutions.

🇩🇰 Denmark · 50 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [ISS A/S](https://www.tamtam.ai/c/iss-a-s) (issworld.com)<br>A workplace experience and facility management company that provides placemaking solutions for better business performance and enjoyable work environments | Facilities Services | 🇩🇰 Copenhagen | 64,283 |  |
| 2 | [Ramboll](https://www.tamtam.ai/c/ramboll) (ramboll.com)<br>Global company offering sustainable solutions in architecture, engineering, and consultancy across various sectors to create sustainable cities and societies worldwide | Engineering Services | 🇩🇰 Copenhagen | 18,506 | 1945 |
| 3 | [FLSmidth](https://www.tamtam.ai/c/flsmidth) (fls.com)<br>A global supplier to the mining and cement industries, FLSmidth offers technology and services to improve performance, reduce costs, and minimize environmental impact | Industrial Machinery Manufacturing | 🇩🇰 Copenhagen | 12,984 | 1882 |
| 4 | [COWI](https://www.tamtam.ai/c/cowi) (cowi.com)<br>The company creates sustainable solutions with a focus on improving quality of life for present and future generations through engineering and architecture expertise | Civil Engineering | 🇩🇰 Lyngby | 8,647 | 1930 |
| 5 | [UNOPS](https://www.tamtam.ai/c/unops) (unops.org)<br>Organization supporting the UN and partners in delivering humanitarian, development, and security solutions to build better lives and promote peace and sustainable development | Non-profit Organizations | 🇩🇰 Copenhagen | 8,492 |  |
| 6 | [Netcompany](https://www.tamtam.ai/c/netcompany) (netcompany.com)<br>Providing agile IT consulting and digital transformation services, delivering scalable, modern technology solutions for large Northern European clients. | IT Services and IT Consulting | 🇩🇰 Copenhagen | 8,266 | 2000 |
| 7 | [NIRAS](https://www.tamtam.ai/c/niras) (niras.com)<br>Global consulting firm shaping tomorrow's communities through infrastructure projects, urban planning, and sustainable development initiatives around the world | Civil Engineering | 🇩🇰 Allerød | 3,794 | 1956 |
| 8 | [Atos IT Solutions and Services A/S](https://www.tamtam.ai/c/atos-it-solutions-and-services-a-s) (atos.net)<br>An international IT service provider offering high-tech transaction, consulting, system integration, and outsourcing services to a global customer base across various industries | IT Services and IT Consulting | 🇩🇰 Taastrup | 3,772 | 2011 |
| 9 | [NNE](https://www.tamtam.ai/c/nne) (nne.com)<br>Designs, builds, optimizes pharma manufacturing facilities globally, essential for patient health. Employs over 2,000 across Denmark, India, US. | Engineering Services | 🇩🇰 Virum | 3,539 | 1991 |
| 10 | [MOE Denmark](https://www.tamtam.ai/c/moe-denmark) (arteliagroup.dk)<br>The company offers services under the name Artelia and operates in Denmark Check their LinkedIn profile for more information | Civil Engineering | 🇩🇰 Søborg | 2,916 |  |
| 11 | [Related](https://www.tamtam.ai/c/related) (related.dk)<br>Nordic PR, communications, and marketing agency specializing in tech and travel industries Represents international clients for strategic, tactical, and operational communications services | Public Relations and Communications Services | 🇩🇰 Aarhus | 2,500 | 2003 |
| 12 | [Columbus](https://www.tamtam.ai/c/columbus) (columbusglobal.com)<br>A global IT services and consulting company offering digital transformation solutions for various industries, with extensive experience and a customer-centric approach | IT Services and IT Consulting | 🇩🇰 Copenhagen | 2,496 |  |
| 13 | [FORCE Technology](https://www.tamtam.ai/c/force-technology) (forcetechnology.com)<br>Technology consultancy providing testing, calibration, analysis, sensor systems, and training to support sustainable and safe technological advancements for companies. | Engineering Services | 🇩🇰 Brøndby | 2,372 | 1940 |
| 14 | [emagine](https://www.tamtam.ai/c/emagine) (emagine.org)<br>Providing tailored IT consulting services including team extension, nearshoring, dedicated teams, and managed services for diverse industries. | IT Services and IT Consulting | 🇩🇰 Copenhagen | 2,182 | 1989 |
| 15 | [Semco Maritime](https://www.tamtam.ai/c/semco-maritime) (semcomaritime.com)<br>An international engineering and contracting company with expertise in conventional energy and offshore wind, supporting a sustainable energy transition | Renewable Energy Semiconductor Manufacturing | 🇩🇰 Esbjerg | 2,113 | 1980 |
| 16 | [Implement Consulting Group](https://www.tamtam.ai/c/implement-consulting-group) (implementconsultinggroup.com)<br>Company helps organizations with transformation and functional expertise. Focus on human-centric change, agile teams, and client collaboration for competitive, adaptable, sustainable, and innovative results. | Business Consulting and Services | 🇩🇰 Hellerup | 2,007 | 1996 |
| 17 | [DHI](https://www.tamtam.ai/c/dhi) (dhigroup.com)<br>The company specializes in water management, climate change adaptation, water quality improvement, and offering sustainable solutions for the global water industry | Environmental Services | 🇩🇰 Hørsholm | 1,794 | 1964 |
| 18 | [Beierholm](https://www.tamtam.ai/c/beierholm) (beierholm.dk)<br>auditing and consulting services for small and medium-sized companies, specializing in finance, tax, investment, business development, and sustainability | Accounting | 🇩🇰 Aalborg | 1,774 |  |
| 19 | [PwC Danmark](https://www.tamtam.ai/c/pwc-danmark) (pwc.dk)<br>Providing audit, tax, and advisory services to businesses and public sector clients, focusing on trust and solving key challenges. | Business Consulting and Services | 🇩🇰 Danmark | 1,738 |  |
| 20 | [Designit](https://www.tamtam.ai/c/designit) (designit.com)<br>An award-winning experience innovation company helping businesses create change through strategy, design, marketing, and tech solutions for complex problems | Design Services | 🇩🇰 Copenhagen | 1,663 |  |
| 21 | [NNIT](https://www.tamtam.ai/c/nnit) (nnit.com)<br>An international IT service provider offering consultancy, development, implementation, and outsourcing of IT services to private companies and public sector organizations | IT Services and IT Consulting | 🇩🇰 Copenhagen | 1,636 | 1994 |
| 22 | [Sweco Danmark A/S](https://www.tamtam.ai/c/sweco-danmark-a-s) (sweco.dk)<br>Sweco plans and designs sustainable buildings, efficient infrastructure, and clean water access worldwide, with 15,000 employees offering expertise for diverse projects | Civil Engineering | 🇩🇰 Amager Vest | 1,284 |  |
| 23 | [Artelia Denmark](https://www.tamtam.ai/c/artelia-denmark) (arteliagroup.dk)<br>Large multidisciplinary consulting engineering company, specializing in building construction, infrastructure, water, industry, energy. Part of an international group with global presence. | Civil Engineering | 🇩🇰 Søborg | 1,278 |  |
| 24 | [Ramboll Management Consulting](https://www.tamtam.ai/c/ramboll-management-consulting) (ramboll.com)<br>Empowering sustainable change through multi-disciplined management consultancy, addressing global megatrends like digitalisation, climate change, and sustainability with a Nordic heritage. | Business Consulting and Services | 🇩🇰 2300 Copenhagen S | 1,300 | 1968 |
| 25 | [BDO Danmark](https://www.tamtam.ai/c/bdo-danmark) (bdo.dk)<br>The company is a Danish-owned and operated advisory firm, part of the global BDO network, providing auditing, accounting, and consulting services to businesses for growth and development | Accounting | 🇩🇰 Aarhus | 1,227 | 1903 |
| 26 | [JKS a\|s](https://www.tamtam.ai/c/jks-a-s) (jks.dk)<br>A Danish-owned staffing and recruitment firm offering tailored solutions to enhance clients' competitiveness through professional recruiting, flexible staffing, and career guidance | Staffing and Recruiting | 🇩🇰 Ringkøbing | 1,169 | 1995 |
| 27 | [DELTA - a part of FORCE Technology](https://www.tamtam.ai/c/delta-a-part-of-force-technology) (madebydelta.com)<br>An independent technology company providing accessible information, advanced technology services, product development support, testing, certification, and sustainable solutions since 1941 | Engineering Services | 🇩🇰 Hørsholm | 1,086 |  |
| 28 | [Teach](https://www.tamtam.ai/c/teach) (teach.dk)<br>The company focuses on continuous school development by collaborating with teachers, educators, school leaders, and municipalities, emphasizing partnerships and cooperation | Education Administration Programs | 🇩🇰 Silkeborg | 1,028 |  |
| 29 | [ISS France](https://www.tamtam.ai/c/iss-france) (issworld.com)<br>Provider of integrated facility services including cleaning, catering, security, property, and support services for diverse industries and workplaces. | Facilities Services | 🇩🇰 Copenhagen | 1,018 | 1994 |
| 30 | [VML MAP](https://www.tamtam.ai/c/vml-map) (vml-map.com)<br>Global team specializing in Marketing Automation, Personalization, Loyalty, and CRM, crafting personalized content to create connections between brands and consumers worldwide | Business Consulting and Services | 🇩🇰 Copenhagen | 929 |  |
| 31 | [7N](https://www.tamtam.ai/c/7n) (7n.com)<br>Providing IT consulting services, supporting clients with sourcing of IT consultants, end-to-end solutions, and professional learning. Enabling digital transformation across the IT project life cycle. | IT Services and IT Consulting | 🇩🇰 Copenhagen | 920 | 1965 |
| 32 | [Poul Schmith/Kammeradvokaten](https://www.tamtam.ai/c/poul-schmith-kammeradvokaten) (poulschmith.dk)<br>A leading Danish law firm with extensive experience in litigation and arbitration, offering a wide range of services including regulatory advice and public law practice | Law Practice | 🇩🇰 København V | 842 | 1936 |
| 33 | [Init](https://www.tamtam.ai/c/init) (initgroup.com)<br>Uniting top companies and professionals in Industrial IT and automation across multiple European countries with around 800 employees. | Software Development | 🇩🇰 Gladsaxe | 823 | 2022 |
| 34 | [Moment A/S](https://www.tamtam.ai/c/moment-a-s) (moment.dk)<br>Leader in temp and recruitment services in Denmark, connecting talented candidates with varied jobs while prioritizing proper conditions for employees and temps | Staffing and Recruiting | 🇩🇰 Copenhagen | 818 | 1997 |
| 35 | [AlfaPeople](https://www.tamtam.ai/c/alfapeople) (alfapeople.com)<br>A global leader in Microsoft Dynamics 365 consulting, offering tailored CRM and ERP solutions to drive growth and customer satisfaction worldwide | IT Services and IT Consulting | 🇩🇰 København SV | 726 | 2009 |
| 36 | [NIRAS International Consulting](https://www.tamtam.ai/c/niras-international-consulting) (niras.com)<br>International consultancy providing technical assistance and project management for development programs worldwide with a large network of experts | Business Consulting and Services | 🇩🇰 Copenhagen | 704 | 1956 |
| 37 | [Plesner](https://www.tamtam.ai/c/plesner) (plesner.com)<br>Leading Danish law firm specializing in strategic legal advisory services for businesses, asset protection, transfer, financing, and complex dispute resolution | Law Practice | 🇩🇰 Copenhagen | 690 | 1918 |
| 38 | [Bech-Bruun](https://www.tamtam.ai/c/bech-bruun) (bechbruun.com)<br>Bech-Bruun is a market-oriented law firm specializing in all areas of business law, offering services to Danish business, public sector, and global companies | Law Practice | 🇩🇰 Copenhagen | 674 | 1872 |
| 39 | [Kromann Reumert](https://www.tamtam.ai/c/kromann-reumert) (kromannreumert.com)<br>Leading full-service law firm with offices in Denmark and London, offering quality legal services with a team of almost 550 dedicated professionals | Law Practice | 🇩🇰 2100 Copenhagen O | 659 | 2000 |
| 40 | [Gorrissen Federspiel](https://www.tamtam.ai/c/gorrissen-federspiel) (gorrissenfederspiel.com)<br>A leading Danish law firm offering top legal solutions to domestic and international clients through a team of ambitious professionals | Law Practice | 🇩🇰 Copenhagen | 648 |  |
| 41 | [WSP Danmark](https://www.tamtam.ai/c/wsp-danmark) (wsp.com)<br>Leading professional services consulting firm shaping built and natural environments for future generations through innovative solutions and sustainable practices | Professional Services | 🇩🇰 Høje Taastrup | 638 | 1885 |
| 42 | [Arkitema](https://www.tamtam.ai/c/arkitema) (arkitema.com)<br>A leading Scandinavian architectural firm specializing in creating sustainable cities through collaboration, expertise, and design in various sectors | Architecture and Planning | 🇩🇰 Aarhus | 635 | 1969 |
| 43 | [EDC Poul Erik Bech](https://www.tamtam.ai/c/edc-poul-erik-bech) (poulerikbech.dk)<br>The largest estate agency in Denmark with over 500 employees, offering residential and commercial services independently from banks, supporting charitable initiatives | Real Estate | 🇩🇰 Copenhagen | 623 | 1978 |
| 44 | [Forca A/S](https://www.tamtam.ai/c/forca-a-s) (forca.dk)<br>Specialized in large-scale, agile development of membership, actuarial, fund, IT, and financial services for pension industry clients. | Financial Services | 🇩🇰 Hellerup | 622 | 2006 |
| 45 | [Henning Larsen](https://www.tamtam.ai/c/henning-larsen) (henninglarsen.com)<br>An international design studio specializing in architecture, landscape, and urbanism, focusing on creating spaces that prioritize human interaction, natural light, and sustainability | Architecture and Planning | 🇩🇰 Copenhagen | 613 | 1959 |
| 46 | [Grant Thornton Denmark](https://www.tamtam.ai/c/grant-thornton-denmark) (grantthornton.dk)<br>A Danish-owned accounting and consulting firm with almost 600 employees offering auditing, accounting, and advisory services to a diverse client portfolio | Accounting | 🇩🇰 2100 København Ø | 581 | 2011 |
| 47 | [KPMG Denmark](https://www.tamtam.ai/c/kpmg-denmark) (kpmg.com)<br>Deliver audit, tax, and advisory services using technology to empower clients, drive transformation, and add value to businesses and society. | Business Consulting and Services | 🇩🇰 | 570 | 2014 |
| 48 | [Zacco - 360° Intellectual Property](https://www.tamtam.ai/c/zacco-360-intellectual-property) (zacco.com)<br>An international full-service IP solutions and brand protection specialist, helping organizations develop, manage, and protect their intellectual property globally | Legal Services | 🇩🇰 Copenhagen | 539 |  |
| 49 | [LanguageWire](https://www.tamtam.ai/c/languagewire) (languagewire.com)<br>A global Language Service Provider offering translation and multilingual communication services through a combination of AI technology and human expertise | IT Services and IT Consulting | 🇩🇰 Copenhagen | 535 | 2000 |
| 50 | [CfL - Bedre ledere. Bedre resultater.](https://www.tamtam.ai/c/cfl-bedre-ledere-bedre-resultater) (cfl.dk)<br>A leadership center in Denmark offering a full range of services to develop leaders and organizations, focused on improving leadership quality | Business Consulting and Services | 🇩🇰 Copenhagen | 517 |  |

## 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.

## More company lists in Denmark

- [The largest companies in Denmark](https://www.tamtam.ai/l/largest-companies-denmark) (2,804)
- [Multinational companies in Denmark](https://www.tamtam.ai/l/multinational-companies-denmark) (777)
- [Retail chains in Denmark](https://www.tamtam.ai/l/retail-chains-denmark) (339)
- [Manufacturers in Denmark](https://www.tamtam.ai/l/manufacturers-denmark) (294)
- [Software Development companies in Denmark](https://www.tamtam.ai/l/software-development-companies-denmark) (279)
- [Companies with in-house R&D in Denmark](https://www.tamtam.ai/l/r-and-d-companies-denmark) (259)
- [SaaS companies in Denmark](https://www.tamtam.ai/l/saas-companies-denmark) (253)
- [Critical infrastructure operators in Denmark](https://www.tamtam.ai/l/critical-infrastructure-operators-denmark) (175)
- [Hardware manufacturers in Denmark](https://www.tamtam.ai/l/hardware-companies-denmark) (173)
- [Financial services firms in Denmark](https://www.tamtam.ai/l/financial-services-firms-denmark) (160)
- [E-commerce companies in Denmark](https://www.tamtam.ai/l/ecommerce-companies-denmark) (152)
- [Public sector organisations in Denmark](https://www.tamtam.ai/l/public-sector-organisations-denmark) (150)
- [Companies with a mobile app in Denmark](https://www.tamtam.ai/l/companies-with-mobile-app-denmark) (145)
- [Subscription businesses in Denmark](https://www.tamtam.ai/l/subscription-businesses-denmark) (134)
- [Distributors and wholesalers in Denmark](https://www.tamtam.ai/l/distributors-and-wholesalers-denmark) (122)
- [Food and Beverage Manufacturing companies in Denmark](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-denmark) (119)
- [Retail Apparel and Fashion companies in Denmark](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-denmark) (119)
- [Government Administration companies in Denmark](https://www.tamtam.ai/l/government-administration-companies-denmark) (115)
- [Education providers in Denmark](https://www.tamtam.ai/l/education-companies-denmark) (109)
- [Hotel and hospitality groups in Denmark](https://www.tamtam.ai/l/hospitality-groups-denmark) (109)
- [Consulting firms in Denmark](https://www.tamtam.ai/l/consulting-firms-denmark) (107)
- [IT services companies in Denmark](https://www.tamtam.ai/l/it-services-companies-denmark) (102)
- [Food and beverage companies in Denmark](https://www.tamtam.ai/l/food-and-beverage-companies-denmark) (101)
- [IT Services and IT Consulting companies in Denmark](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-denmark) (96)

## The same list elsewhere in Denmark

- [Professional services firms in Capital Region of Denmark](https://www.tamtam.ai/l/professional-services-firms-capital-region-of-denmark) (33)
- [Professional services firms in Copenhagen](https://www.tamtam.ai/l/professional-services-firms-copenhagen) (56)

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