# Top 50 professional services firms in Rio de Janeiro State

Tamtam tracks 60 professional services firms headquartered in Rio de Janeiro State. This list ranks the 50 largest by number of employees on LinkedIn, led by Infotec Brasil, Doméstica Legal and home office. Their median headcount is 439. Half of them were founded in 2003 or later. The most common headquarters are Rio de Janeiro (43) and Macaé (2).

This selection of professional services firms in Rio de Janeiro State includes a mix of business consulting, legal, and communication agencies. Most are mid-sized to large firms, with a strong concentration in the city of Rio de Janeiro. Companies such as Infotec Brasil offer outsourcing services, while FSB Comunicação specializes in integrated corporate communications. BMA Advogados provides comprehensive legal support, and Doméstica Legal focuses on services for domestic employers and workers.

A notable pattern is the dominance of companies headquartered in Rio de Janeiro city, indicating a central hub for professional services in the state. Several firms also have a long history, with Dannemann Siemsen, a leader in Intellectual Property, founded in 1900, and Grupo SERES, an HR solutions provider, established in 1964.

🇧🇷 Rio de Janeiro State · 50 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 | [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 |
| 10 | [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 |
| 11 | [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 |
| 12 | [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 |
| 13 | [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 |  |
| 14 | [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 |
| 15 | [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 |
| 16 | [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 |
| 17 | [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 |
| 18 | [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 |
| 19 | [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 |
| 20 | [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 |
| 21 | [TO Brasil](https://www.tamtam.ai/c/to-brasil) (to-brasil.com)<br>Providing technology and business solutions with global disruptive technologies, strategic partnerships, and continuous quality improvement for clients. | IT Services and IT Consulting | 🇧🇷 Centro | 460 | 2003 |
| 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 | [JG Engenharia](https://www.tamtam.ai/c/jg-engenharia) (jgeng.com.br)<br>Specializing in engineering services, including design, construction, and project management for various industries and infrastructure projects | Outsourcing and Offshoring Consulting | 🇧🇷 Macaé | 433 | 2003 |
| 28 | [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 |
| 29 | [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 |
| 30 | [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 |
| 31 | [Profissional Independente Jurídico](https://www.tamtam.ai/c/profissional-independente-juridico)<br>Legal professional specialized in electronic court procedures since 2000, handling various court systems and conducting out-of-court actions | Law Practice | 🇧🇷 Duque de Caxias | 394 | 2020 |
| 32 | [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 |  |
| 33 | [True Auditoria, Consultoria & Serviços](https://www.tamtam.ai/c/true-auditoria-consultoria-and-servicos) (trueauditoria.com.br)<br>A complete platform in the Health sector, applying modern concepts from Banking and Industry with a highly qualified and diverse team | Legal Services | 🇧🇷 Rio de Janeiro | 368 |  |
| 34 | [Winner RH](https://www.tamtam.ai/c/winner-rh) (winnerrh.com.br)<br>Specialized in HR consultancy, the company focuses on maximizing client results through tailored solutions, transparency, ethics, quality service, and respect for all stakeholders | Human Resources Services | 🇧🇷 Rio de Janeiro | 346 | 2011 |
| 35 | [Outra Coisa](https://www.tamtam.ai/c/outra-coisa) (outracoisa.co)<br>Specializing in digital product design for global clients, ranging from major corporations like Google and Coca-Cola to startups, creating engaging digital experiences for all | Design Services | 🇧🇷 Rio de Janeiro | 345 | 2014 |
| 36 | [Licks Attorneys](https://www.tamtam.ai/c/licks-attorneys) (lickslegal.com)<br>Top-tier Brazilian law practice specializing in Intellectual Property, Life Sciences, Regulatory, Internet Law, Data Privacy, and Cyber Crime cases nationwide | Legal Services | 🇧🇷 Rio de Janeiro | 335 | 2011 |
| 37 | [Durão & Almeida, Pontes Advocacia](https://www.tamtam.ai/c/durao-and-almeida-pontes-advocacia) (brunoduraoadvocacia.com)<br>We are a legal office that fights to change the lives of our clients through proactive, specialized, and innovative legal representation | Law Practice | 🇧🇷 Rio de Janeiro | 333 | 2008 |
| 38 | [CF Contabilidade](https://www.tamtam.ai/c/cf-contabilidade) (cfcontabilidade.com.br)<br>Specializing in comprehensive business management solutions since 1989, prioritizing client growth through tailored processes, continuous improvement, and proactive consulting services | Accounting | 🇧🇷 Rio de Janeiro | 331 | 1989 |
| 39 | [SANDECH](https://www.tamtam.ai/c/sandech) (sandech.com.br)<br>An engineering and management consulting firm providing high-tech solutions for various industries with a focus on innovation, quality, and employee development | Business Consulting and Services | 🇧🇷 Rio de Janeiro | 317 | 2008 |
| 40 | [Rafael Freitas \| Advogado](https://www.tamtam.ai/c/rafael-freitas-advogado) (rfreitasadv.com.br)<br>Specialized legal consultancy in Civil Law, focusing on contracts, real estate, liability, consumer, and successions, offering personalized support with excellence | Legal Services | 🇧🇷 Petrópolis | 317 | 2013 |
| 41 | [FGV Projetos](https://www.tamtam.ai/c/fgv-projetos) (fgvprojetos.fgv.br)<br>A consultancy unit applying academic knowledge to develop projects in economics, management, and public policies for public and private organizations | Business Consulting and Services | 🇧🇷 Rio de Janeiro | 310 |  |
| 42 | [ENGEMIP ENGENHARIA E MANUTENÇÃO.](https://www.tamtam.ai/c/engemip-engenharia-e-manutencao) (engemipengenharia.com.br)<br>Provider of engineering services and maintenance | Facilities Services | 🇧🇷 Rio de Janeiro | 307 | 2014 |
| 43 | [Pellon Advocacia](https://www.tamtam.ai/c/pellon-advocacia) (pellon.com.br)<br>Specializing in Insurance and Reinsurance, the company also operates in Telecom, Banking, Public Utilities, Aviation, Transportation, Industry and Services sectors with international recognition | Legal Services | 🇧🇷 Rio de Janeiro | 295 | 1991 |
| 44 | [Leader](https://www.tamtam.ai/c/leader-rio-de-janeiro) (leaderempresarial.com.br)<br>Passionate about innovation and results, we are leaders in financial solutions with a focus on the Leader culture Embracing the future 🎯 #ShapingTheFuture | Financial Services | 🇧🇷 Rio de Janeiro | 283 | 2015 |
| 45 | [Lifting Electric](https://www.tamtam.ai/c/lifting-electric) (lifting.com.br)<br>Specialized in repairing, maintaining, and installing electrical, electronic, instrumentation, and automation equipment for the naval and industrial sectors with multiple certifications for quality and safety standards | Engineering Services | 🇧🇷 Niterói | 236 | 1993 |
| 46 | [Prodec](https://www.tamtam.ai/c/prodec) (prodec.com.br)<br>The company, founded in Rio de Janeiro in 1970, specializes in engineering consulting, coordinating large projects nationally and internationally for over four decades | Civil Engineering | 🇧🇷 Centro | 235 | 1970 |
| 47 | [VV Holding & Consulting](https://www.tamtam.ai/c/vv-holding-and-consulting) (vvconsulting.com.br)<br>With nearly 15 years of experience, specializes in outsourcing skilled professionals and excels in project management for major industrial projects globally | Outsourcing and Offshoring Consulting | 🇧🇷 Macaé | 229 | 2013 |
| 48 | [Jacobsen](https://www.tamtam.ai/c/jacobsen) (jacobsenarquitetura.com)<br>Specializing in projects that harmoniously blend with nature, tailored to clients' visions, Jacobsen Arquitetura is a renowned architectural practice co-founded by Paulo and Bernardo Jacobsen | Architecture and Planning | 🇧🇷 Rio de Janeiro | 213 | 2012 |
| 49 | [FCDG Advogados](https://www.tamtam.ai/c/fcdg-advogados) (fcdg.com.br)<br>Specialized in dispute resolution, offering representation in complex litigation, arbitrations, insolvency procedures, and negotiations Experienced team with solid academic backgrounds | Law Practice | 🇧🇷 Rio de Janeiro | 209 | 2004 |
| 50 | [MJV Technology & Innovation](https://www.tamtam.ai/c/mjv-technology-and-innovation-rio-de-janeiro) (mjvinnovation.com)<br>Digitally-driven innovation agency offering end-to-end solutions, from research to IT implementation, with a multidisciplinary team focused on leveraging technology to solve business challenges globally | Management Consulting | 🇧🇷 Rio de Janeiro | 199 | 1996 |

## 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-state