# The 30 largest professional services firms in Rio de Janeiro

Tamtam tracks 53 professional services firms headquartered in Rio de Janeiro. This list ranks the 30 largest by number of employees on LinkedIn, led by Infotec Brasil, Doméstica Legal and home office. Their median headcount is 682. Half of them were founded in 1998 or later.

The professional services sector in Rio de Janeiro is characterized by a mix of business consulting, legal, and communications firms. Companies like Infotec Brasil specialize in outsourcing services, while Doméstica Legal focuses on providing support for domestic employers and workers. FSB Comunicação is an integrated communications agency, and BMA Advogados offers comprehensive legal support to Brazilian and international clients. These firms generally represent mid-sized to large operations.

A notable pattern among these companies is their strong presence in business consulting and legal services. For instance, Visagio and EloGroup are prominent in business consulting, while Veirano Advogados and Dannemann Siemsen are key players in the legal field, with Dannemann Siemsen having a long history in intellectual property since 1900. The majority of these firms are headquartered in Rio de Janeiro.

🇧🇷 Rio de Janeiro · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Infotec Brasil](https://www.tamtam.ai/c/infotec-brasil) (infotecbrasil.com.br)<br>Specializing in Outsourcing Services and Processes, the company offers efficiency, cost reduction, and environmental care through various specialized services | Business Consulting and Services | 🇧🇷 Rio de Janeiro | 3,753 | 1985 |
| 2 | [Doméstica Legal](https://www.tamtam.ai/c/domestica-legal) (go.domesticalegal.com.br)<br>Providing a secure and reliable environment for employers and domestic workers, ensuring obligations are met to prevent labor disputes and promote peace of mind | Business Consulting and Services | 🇧🇷 Rio de Janeiro | 1,825 | 2004 |
| 3 | [home office](https://www.tamtam.ai/c/home-office-rio-de-janeiro) (rodrigomuller.com.br)<br>Specializing in minimalistic design, the company focuses on sleek and understated aesthetics, offering products or services tailored to those who appreciate simplicity and elegance | Graphic Design | 🇧🇷 Rio de Janeiro | 1,792 | 2005 |
| 4 | [FSB Comunicação](https://www.tamtam.ai/c/fsb-comunicacao) (fsb.com.br)<br>An Integrated Communications agency specializing in Corporate Communications, Media Relations, Brand Building, Digital Communications, Research, and Design & Content services | Public Relations and Communications Services | 🇧🇷 Rio de Janeiro | 1,386 | 1980 |
| 5 | [BMA Advogados](https://www.tamtam.ai/c/bma-advogados) (bmalaw.com.br)<br>A leading Latin American law organization offering comprehensive legal support in various business areas for Brazilian and international clients since 1995 | Law Practice | 🇧🇷 Rio de Janeiro | 1,022 | 1995 |
| 6 | [Visagio](https://www.tamtam.ai/c/visagio) (visagio.com)<br>Part of Visagio Group, specializing in providing solutions and services in diverse industries | Business Consulting and Services | 🇧🇷 Rio de Janeiro | 927 | 2003 |
| 7 | [EloGroup](https://www.tamtam.ai/c/elogroup) (elogroup.com)<br>A business transformation platform integrating Technology, Analytics, and Management expertise to develop digital solutions that drive change for organizations | Business Consulting and Services | 🇧🇷 Rio de Janeiro | 922 | 2007 |
| 8 | [Guanabara](https://www.tamtam.ai/c/guanabara-rio-de-janeiro) (guanabaraconsulting.com)<br>Specialized services provider offering strategic expertise in energy sectors, focusing on strategic planning, business development, M&A, market entry strategies, and more | Business Consulting and Services | 🇧🇷 Rio de Janeiro | 911 |  |
| 9 | [Grupo SERES](https://www.tamtam.ai/c/grupo-seres) (gruposeres.com.br)<br>Offers comprehensive Human Resources solutions including recruitment, selection, executive search, corporate university, leadership development, outsourcing, temporary staffing, and payroll management. | Human Resources Services | 🇧🇷 Rio de Janeiro | 855 | 1964 |
| 10 | [Dannemann Siemsen](https://www.tamtam.ai/c/dannemann-siemsen) (dannemann.com.br)<br>Leader in Intellectual Property in Latin America since 1900, providing legal advice and protection to domestic and foreign companies with expertise in patents, trademarks, and litigation | Legal Services | 🇧🇷 Rio de Janeiro | 854 | 1900 |
| 11 | [Veirano Advogados](https://www.tamtam.ai/c/veirano-advogados) (veirano.com.br)<br>Leading Brazilian business law firm providing tailored solutions for multinational companies in strategic sectors, offering expertise in M&A, disputes, tax, infrastructure, and oil & gas industries | Law Practice | 🇧🇷 Rio de Janeiro | 829 | 1972 |
| 12 | [CHALFIN, GOLDBERG & VAINBOIM Advogados](https://www.tamtam.ai/c/chalfin-goldberg-and-vainboim-advogados) (cgvadvogados.com.br)<br>A leading Brazilian law group specialized in insurance, banking, labor, and real estate law, offering both litigation and consulting services nationwide | Legal Services | 🇧🇷 Rio de Janeiro | 796 | 2000 |
| 13 | [CTA Engenharia](https://www.tamtam.ai/c/cta-engenharia) (ctaengenharia.com.br)<br>With over 20 years of experience, the organization provides engineering and contract management services nationwide, focusing on integrity, quality, and environmental responsibility | Environmental Services | 🇧🇷 Rio de Janeiro | 746 | 1995 |
| 14 | [Quality Assurance](https://www.tamtam.ai/c/quality-assurance) (qaconsultoria.com.br)<br>Established in 1987, the organization specializes in implementing management systems based on international standards for various industries including oil, gas, and other sectors | Business Consulting and Services | 🇧🇷 Rio de Janeiro | 710 |  |
| 15 | [Sondotécnica Engenharia](https://www.tamtam.ai/c/sondotecnica-engenharia) (sondotecnica.com.br)<br>A multidisciplinary engineering organization specializing in structural design, hydrology, oceanography, sediment transport, and feasibility studies with extensive project experience globally | Civil Engineering | 🇧🇷 Rio de Janeiro | 682 | 1954 |
| 16 | [Domingues e Pinho Contadores](https://www.tamtam.ai/c/domingues-e-pinho-contadores) (dpc.com.br)<br>Leader in providing accounting outsourcing services in Brazil, offering excellent management services with a global vision for foreign investors Serving over 600 multinational clients | Accounting | 🇧🇷 Rio de Janeiro | 654 | 1984 |
| 17 | [Forship Engenharia](https://www.tamtam.ai/c/forship-engenharia) (forship.com)<br>Specialized engineering services and integrated solutions for industrial assets in various sectors worldwide, offering construction, commissioning, maintenance, consulting, and software solutions | Oil, Gas, and Mining | 🇧🇷 Rio de Janeiro | 645 | 1998 |
| 18 | [FGV DGPE](https://www.tamtam.ai/c/fgv-dgpe)<br>The Diretoria de Desenvolvimento da Gestão Pública e Políticas Educacionais focuses on improving public management and education policies to positively impact social indicators in Brazil | Think Tanks | 🇧🇷 Rio de Janeiro | 593 | 2018 |
| 19 | [Bichara Advogados](https://www.tamtam.ai/c/bichara-advogados) (bicharalaw.com.br)<br>A full-service legal team with over 150 lawyers across multiple locations, offering customized solutions to national and international clients | Law Practice | 🇧🇷 Rio de Janeiro | 538 | 2001 |
| 20 | [SESATECH](https://www.tamtam.ai/c/sesatech) (sesatech.com.br)<br>Specialized in digital transformation and automation projects, offering solutions in applications, systems integration, AI, Big Data, Machine Learning, API's, and RPA Aiming for secure and efficient infrastructure modernization | IT Services and IT Consulting | 🇧🇷 Rio de Janeiro | 480 | 2022 |
| 21 | [Iqony Solutions do Brasil](https://www.tamtam.ai/c/iqony-solutions-do-brasil) (iqony.com.br)<br>Provider of professional energy services in South America Offers Engineering, Operation, and Maintenance services in the renewable energy sector with a focus on solar, wind, and thermal plants | Electric Power Generation | 🇧🇷 Rio de Janeiro | 472 | 2002 |
| 22 | [Talentos Consultoria](https://www.tamtam.ai/c/talentos-consultoria) (talentosconsultoria.com.br)<br>Specialized in human resources management, providing a wide range of services to optimize client's time and resources, enhancing business productivity | Human Resources Services | 🇧🇷 Rio de Janeiro | 453 | 2011 |
| 23 | [Personale Consultoria](https://www.tamtam.ai/c/personale-consultoria) (personale.com.br)<br>A leading HR consultancy offering customized solutions in talent management through recruitment, development, training, and strategic partnerships across Brazil | Human Resources Services | 🇧🇷 Rio de Janeiro | 446 | 1993 |
| 24 | [Tauil & Chequer Advogados associado a Mayer Brown](https://www.tamtam.ai/c/tauil-and-chequer-advogados-associado-a-mayer-brown) (tauilchequer.com.br)<br>A Brazilian law office with a global reach, providing legal services to organizations in multijurisdictional operations with a focus on excellence and innovation | Law Practice | 🇧🇷 Rio de Janeiro | 445 | 2000 |
| 25 | [GP Assessoria em Orgão Públicos](https://www.tamtam.ai/c/gp-assessoria-em-orgao-publicos) (gpassessoria.net.br)<br>Assistance in legal documentation and guidance for selling to government entities, particularly for businesses new to this process | Government Relations Services | 🇧🇷 Rio de Janeiro | 439 |  |
| 26 | [Guimar](https://www.tamtam.ai/c/guimar) (guimar.com.br)<br>Specializing in managing implementation of industrial, infrastructure, and building projects, one of the largest engineering consultancies in the country Operating in Brazil and other South American countries | Business Consulting and Services | 🇧🇷 Rio de Janeiro | 437 | 1990 |
| 27 | [Gondim Albuquerque Negreiros ADV](https://www.tamtam.ai/c/gondim-albuquerque-negreiros-adv) (gondimadv.com.br)<br>Specializing in high-volume litigation, this innovative team efficiently eliminates processes using technology, ensuring quick resolution without the need for ties | Administration of Justice | 🇧🇷 Rio de Janeiro | 421 | 2003 |
| 28 | [rra](https://www.tamtam.ai/c/rra) (rra.com.br)<br>Mission-driven firm specializing in sustainable construction projects, offering innovative, market-adapted solutions in Architecture, Urbanism, and Landscaping with a focus on quality and client satisfaction | Architecture and Planning | 🇧🇷 Rio de Janeiro | 408 | 1987 |
| 29 | [Villemor Amaral Advogados](https://www.tamtam.ai/c/villemor-amaral-advogados) (villemor.com.br)<br>Specialized multidisciplinary law office with a strong focus on being an extension of clients' internal teams, providing efficient and personalized legal services | Legal Services | 🇧🇷 Rio de Janeiro | 394 | 1909 |
| 30 | [RSM BRASIL (ACAL)](https://www.tamtam.ai/c/rsm-brasil-acal) (rsmbrasil.com.br)<br>We are a bold organization offering customized services with innovative ideas, anticipating solutions, and providing alternative paths to exceed clients' expectations worldwide | Financial Services | 🇧🇷 Rio de Janeiro | 385 |  |

## 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.

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Source: https://www.tamtam.ai/l/professional-services-firms-rio-de-janeiro