# 30 leading professional services firms in Madrid

Tamtam tracks 227 professional services firms headquartered in Madrid. This list ranks the 30 largest by number of employees on LinkedIn, led by NTT DATA Europe & Latam, Applus+ and Tecnicas Reunidas. Their median headcount is 2,718. Half of them were founded in 1988 or later.

The largest professional services firms in Madrid include global IT, consulting, and engineering companies. NTT DATA Europe & Latam offers IT services, Applus+ specializes in testing and inspection, and Tecnicas Reunidas is an international contractor for industrial facilities. Other notable firms are Grupo Tragsa, providing environmental services, and ILUNION, focused on accessibility solutions.

A common thread among these companies is their headquarters in Madrid, indicating a concentration of professional services within the city. Many of these firms, such as KPMG España and PwC España, offer a broad spectrum of advisory services, from audit and tax to business consulting, serving a diverse clientele across various sectors.

🇪🇸 Madrid · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [NTT DATA Europe & Latam](https://www.tamtam.ai/c/ntt-data-europe-and-latam) (nttdata.com)<br>Global IT services provider transforming clients through consulting, solutions, and managed services to enable a confident move into the digital future | IT Services and IT Consulting | 🇪🇸 Madrid | 31,932 |  |
| 2 | [Applus+](https://www.tamtam.ai/c/applus) (applus.com)<br>A global leader in testing, inspection, and certification services, providing innovative solutions for asset integrity, regulatory compliance, and environmental performance | Business Consulting and Services | 🇪🇸 Madrid | 20,046 |  |
| 3 | [Tecnicas Reunidas](https://www.tamtam.ai/c/tecnicas-reunidas) (tecnicasreunidas.es)<br>An international general contractor specializing in engineering and construction of industrial facilities in oil & gas, refining, power generation, infrastructures, and energy transition | Engineering Services | 🇪🇸 Madrid | 12,368 | 1960 |
| 4 | [Grupo Tragsa](https://www.tamtam.ai/c/grupo-tragsa) (tragsa.es)<br>Provides engineering, technical assistance, and execution of projects for public administrations in agriculture, environment, and rural development sectors. | Environmental Services | 🇪🇸 Madrid | 12,239 | 1977 |
| 5 | [ILUNION](https://www.tamtam.ai/c/ilunion) (ilunion.com)<br>A group of companies focused on creating a more accessible world, reinventing themselves daily to compete and move forward | Business Consulting and Services | 🇪🇸 Madrid | 8,198 | 2014 |
| 6 | [Accenture España](https://www.tamtam.ai/c/accenture-espana) (accenture.com)<br>A global professional services company helping businesses and governments with digital transformation, cloud technology, data analytics, and industry expertise to drive tangible outcomes | Business Consulting and Services | 🇪🇸 Madrid | 6,208 |  |
| 7 | [INECO](https://www.tamtam.ai/c/ineco) (ineco.com)<br>A leading engineering and consulting firm in sustainable mobility and digital transformation, with a global presence and a focus on innovation | Civil Engineering | 🇪🇸 Madrid | 5,743 | 1968 |
| 8 | [KPMG España](https://www.tamtam.ai/c/kpmg-espana) (kpmg.com)<br>Professional services firm providing audit, tax, legal, financial, and business advisory with global expertise and local market knowledge. | Professional Services | 🇪🇸 Madrid | 5,523 |  |
| 9 | [Management Solutions](https://www.tamtam.ai/c/management-solutions) (managementsolutions.com)<br>Providing consulting services in strategy, organization, risk management, and technology for financial, energy, and telecommunications sectors worldwide. | Business Consulting and Services | 🇪🇸 Madrid | 4,798 | 2002 |
| 10 | [Quirónprevención](https://www.tamtam.ai/c/quironprevencion) (quironprevencion.com)<br>Providing occupational risk prevention services, promoting workplace safety, and caring for employee health across multiple countries and industries. | Business Consulting and Services | 🇪🇸 Madrid | 4,503 | 2017 |
| 11 | [Randstad España](https://www.tamtam.ai/c/randstad-espana) (randstad.es)<br>Leading provider of human resources solutions in Spain, offering recruitment, training, temporary staffing, and workforce consulting services. | Human Resources Services | 🇪🇸 Madrid | 4,014 |  |
| 12 | [Marktel Global Services SA](https://www.tamtam.ai/c/marktel-global-services-sa) (marktel.es)<br>A group specializing in BPO, Contact Center, and Technology Outsourcing services, providing global solutions with high levels of specialization | Professional Services | 🇪🇸 Madrid | 4,000 | 2000 |
| 13 | [PwC España](https://www.tamtam.ai/c/pwc-espana) (pwc.es)<br>Provides audit, tax, legal, consulting, and transaction services across Spain, helping businesses navigate change and build trust. | Business Consulting and Services | 🇪🇸 Madrid | 3,761 | 1929 |
| 14 | [Garrigues](https://www.tamtam.ai/c/garrigues) (garrigues.com)<br>An international team of legal and tax experts providing top-quality services with commitment to ethics and innovation, helping businesses in various countries | Legal Services | 🇪🇸 Madrid | 2,990 | 1941 |
| 15 | [Servinform](https://www.tamtam.ai/c/servinform) (servinform.es)<br>Providing customized technology solutions including RPA and AI to optimize resources, reduce time, and increase benefits across multiple industries. | IT Services and IT Consulting | 🇪🇸 Madrid | 2,718 | 1977 |
| 16 | [Applus+ Europe](https://www.tamtam.ai/c/applus-europe) (applus.com)<br>A global leader in testing, inspection, and certification services, offering innovative solutions for asset management, compliance inspections, and technical support | Business Consulting and Services | 🇪🇸 Madrid | 1,963 | 1981 |
| 17 | [Entelgy](https://www.tamtam.ai/c/entelgy) (entelgy.com)<br>A global consultancy that accelerates business transformation through innovative technological solutions, helping clients adapt and thrive in a constantly changing world | IT Services and IT Consulting | 🇪🇸 Madrid | 1,796 |  |
| 18 | [ISDEFE](https://www.tamtam.ai/c/isdefe) (isdefe.es)<br>Provides innovative, reliable, sustainable solutions to government challenges, offering consulting, engineering services, and managing aerospace complexes for defense and administration. | Engineering Services | 🇪🇸 Madrid | 1,732 | 1985 |
| 19 | [NWorld Advisory, Tech & Operations](https://www.tamtam.ai/c/nworld-advisory-tech-and-operations) (n.world)<br>A group of specialized companies offering services in various stages of the value chain: Nfq, Nter, and Nforce | Business Consulting and Services | 🇪🇸 Madrid | 1,701 |  |
| 20 | [Safeguard Global Staff Leasing Spain](https://www.tamtam.ai/c/safeguard-global-staff-leasing-spain) (safeguardglobal.com)<br>A global company providing Direct Hire and Temporary Staffing services in over 170 countries with a dedicated team of over 2000 professionals | Staffing and Recruiting | 🇪🇸 Madrid | 1,700 | 2008 |
| 21 | [LLYC](https://www.tamtam.ai/c/llyc) (llyc.global)<br>A creative partner specializing in marketing and corporate affairs to enhance and protect businesses through boldness, innovation, and influence | Public Relations and Communications Services | 🇪🇸 Madrid | 1,649 | 1995 |
| 22 | [Applus+ Oil and Gas](https://www.tamtam.ai/c/applus-oil-and-gas) (applus.com)<br>A global leader in testing, inspection, and certification services, focusing on enhancing quality, safety, and environmental performance across various industries | Business Consulting and Services | 🇪🇸 Madrid | 1,583 | 1937 |
| 23 | [SENASA](https://www.tamtam.ai/c/senasa) (senasa.es)<br>Specialized in training and consultancy for air navigation and security, focusing on aviation professionals and technical assistance to civil aviation authorities | Airlines and Aviation | 🇪🇸 Madrid | 1,463 | 1991 |
| 24 | [Nfq Advisory, Solutions, Outsourcing](https://www.tamtam.ai/c/nfq-advisory-solutions-outsourcing) (nfq.es)<br>Consulting firm specializing in banking, insurance, capital markets with advisory, software solutions, and outsourcing services for financial institutions. | Business Consulting and Services | 🇪🇸 Madrid | 1,393 | 2010 |
| 25 | [Cresa Iberia](https://www.tamtam.ai/c/cresa-iberia) (cresa.com)<br>Real estate consultancy offering comprehensive customer service throughout their transformation process, focusing beyond just the physical space | Real Estate | 🇪🇸 Madrid | 1,373 |  |
| 26 | [Best Relations](https://www.tamtam.ai/c/best-relations) (agencia.best)<br>A PR and social media consulting firm founded in 1998, specializing in strategic thinking for content creation, audience targeting, and marketing goals across various industries | Public Relations and Communications Services | 🇪🇸 Madrid | 1,316 | 1998 |
| 27 | [AENOR](https://www.tamtam.ai/c/aenor) (aenor.com)<br>A global company specializing in Testing, Inspection, and Certification services to help organizations overcome competitiveness gaps and build trust through training and information services | International Trade and Development | 🇪🇸 Madrid | 1,295 | 1986 |
| 28 | [Sngular](https://www.tamtam.ai/c/sngular) (sngular.com)<br>A next-generation technology partner delivering innovative solutions with deep expertise, a global network of innovators, and a focus on sustainability | IT Services and IT Consulting | 🇪🇸 Madrid | 1,285 | 2014 |
| 29 | [TÜV Rheinland Europe](https://www.tamtam.ai/c/tuv-rheinland-europe) (tuv.com)<br>Ensures quality, safety, and efficiency through testing, certifying products, plants, processes, and management systems, alongside qualifying specialists and training individuals for companies globally. | Public Safety | 🇪🇸 Madrid | 1,268 |  |
| 30 | [ManpowerGroup Spain](https://www.tamtam.ai/c/manpowergroup-spain) (manpowergroup.es)<br>Global leader in innovative talent strategy solutions, offering services in recruitment, assessment, training, career development, outsourcing, and consulting to drive business and individual success | Human Resources Services | 🇪🇸 Madrid | 1,224 | 1988 |

## 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 Madrid

- [The largest companies in Madrid](https://www.tamtam.ai/l/largest-companies-madrid) (2,650)
- [Multinational companies in Madrid](https://www.tamtam.ai/l/multinational-companies-madrid) (815)
- [Retail chains in Madrid](https://www.tamtam.ai/l/retail-chains-madrid) (259)
- [Financial services firms in Madrid](https://www.tamtam.ai/l/financial-services-firms-madrid) (231)
- [Wellness and Fitness Services companies in Madrid](https://www.tamtam.ai/l/wellness-and-fitness-services-companies-madrid) (202)
- [Critical infrastructure operators in Madrid](https://www.tamtam.ai/l/critical-infrastructure-operators-madrid) (169)
- [Healthcare providers in Madrid](https://www.tamtam.ai/l/healthcare-providers-madrid) (161)
- [Companies with in-house R&D in Madrid](https://www.tamtam.ai/l/r-and-d-companies-madrid) (158)
- [Companies with a mobile app in Madrid](https://www.tamtam.ai/l/companies-with-mobile-app-madrid) (158)
- [Consulting firms in Madrid](https://www.tamtam.ai/l/consulting-firms-madrid) (157)
- [IT services companies in Madrid](https://www.tamtam.ai/l/it-services-companies-madrid) (155)
- [Education providers in Madrid](https://www.tamtam.ai/l/education-companies-madrid) (141)
- [IT Services and IT Consulting companies in Madrid](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-madrid) (138)
- [Software Development companies in Madrid](https://www.tamtam.ai/l/software-development-companies-madrid) (129)
- [Financial Services companies in Madrid](https://www.tamtam.ai/l/financial-services-companies-madrid) (125)
- [Insurance companies in Madrid](https://www.tamtam.ai/l/insurance-companies-madrid) (122)
- [SaaS companies in Madrid](https://www.tamtam.ai/l/saas-companies-madrid) (113)
- [Hotel and hospitality groups in Madrid](https://www.tamtam.ai/l/hospitality-groups-madrid) (104)
- [Manufacturers in Madrid](https://www.tamtam.ai/l/manufacturers-madrid) (91)
- [Public sector organisations in Madrid](https://www.tamtam.ai/l/public-sector-organisations-madrid) (90)
- [Retail Apparel and Fashion companies in Madrid](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-madrid) (89)
- [Corporate groups and holding companies in Madrid](https://www.tamtam.ai/l/holding-companies-madrid) (89)
- [Business Consulting and Services companies in Madrid](https://www.tamtam.ai/l/business-consulting-and-services-companies-madrid) (80)
- [Marketing and communications agencies in Madrid](https://www.tamtam.ai/l/marketing-agencies-madrid) (79)

## The same list elsewhere in Spain

- [Professional services firms in Spain](https://www.tamtam.ai/l/professional-services-firms-spain) (522)
- [Professional services firms in Community of Madrid](https://www.tamtam.ai/l/professional-services-firms-community-of-madrid) (273)
- [Professional services firms in Catalonia](https://www.tamtam.ai/l/professional-services-firms-catalonia) (108)
- [Professional services firms in Andalusia](https://www.tamtam.ai/l/professional-services-firms-andalusia) (29)
- [Professional services firms in Barcelona](https://www.tamtam.ai/l/professional-services-firms-barcelona) (81)

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