Oab Executive and Leadership Team

July, 2026

Leadership Overview

Oab has 10 executives leading key functions including strategy, legal operations, compliance, and professional development.

Driven by a commitment to justice, Oab champions the Federal Constitution and elevates the legal profession through robust ethical standards and comprehensive support for legal professionals and the public.

Leadership Roles at Oab

  • President, The Compliance & Esg Committee of The Brazilian Bar Association - Roberta Carlini
  • President - Marco Araujo Junior
  • President of the Entrepreneurship Committee of the OAB and SBC - Thabata Guimaraes
  • President, Environmental Law Commission, Rio Grande Do Sul Chapter - Alessandra Lehmen
  • Presidente Nacional - Roberto Busato
  • Presidente Da Comissão De Direito Condominial OAB Conselho Federal 25 and 28 - Rodrigo Karpat
  • Presidente Da Comissão De Direito Do Trabalho Do CFOAB - Ronaldo Tolentino
  • Presidente De Comissão - Stela Velter
  • Presidente Da Comissão Especial De Direito De Infraestrutura Do Conselho Federal Da OAB - Marcos Meira
  • Presidente Comissão Nacional Da Advocacia Multiportas - Eunice Schlieck
  • Roberta Carlini - President, The Compliance & Esg Committee of The Brazilian Bar Association

    Roberta Carlini, the President, The Compliance & Esg Committee of The Brazilian Bar Association at Oab, directs the organization's focus on compliance and Environmental, Social, and Governance (ESG) principles within the legal profession. Carlini champions the integration of ethical business practices and sustainability into legal services and corporate governance. This involves developing guidelines, promoting training programs, and advising on regulatory frameworks related to corporate responsibility and environmental law. The committee under Roberta Carlini's leadership ensures that legal professionals are equipped to address the evolving demands of compliance and ESG, contributing to a more responsible and sustainable business environment in Brazil and strengthening the OAB's role in promoting ethical legal practice.

    Marco Araujo Junior - President

    Marco Araujo Junior, the President at Oab, holds a pivotal leadership position within the organization. Araujo Junior oversees the strategic direction and operational execution of the OAB's mandate to regulate and represent the legal profession in Brazil. This role involves ensuring the defense of the Federal Constitution, promoting legal education, and upholding ethical standards among lawyers nationwide. The President's responsibilities extend to fostering professional development, managing the national registry, and facilitating access to legal information for both professionals and the public. Marco Araujo Junior's leadership is instrumental in advancing the OAB's mission and its impact on the Brazilian justice system.
    Marco Araujo Junior

    Thabata Guimaraes - President of the Entrepreneurship Committee of the OAB and SBC

    Thabata Guimaraes, the President of the Entrepreneurship Committee of the OAB and SBC at Oab, leads initiatives focused on fostering entrepreneurship within the legal sector and supporting business innovation. Guimaraes drives programs designed to equip lawyers and law students with the skills and knowledge necessary to navigate the complexities of starting and managing legal practices or businesses. This involves organizing workshops, developing resources, and facilitating networking opportunities that encourage entrepreneurial ventures. The committee under Thabata Guimaraes's direction plays a crucial role in adapting the legal profession to new market demands and promoting a culture of innovation, aligning with the OAB's broader goals of professional advancement and economic contribution.

    Alessandra Lehmen - President, Environmental Law Commission, Rio Grande Do Sul Chapter

    Alessandra Lehmen, the President, Environmental Law Commission, Rio Grande Do Sul Chapter at Oab, directs the regional commission's efforts concerning environmental law within the state of Rio Grande Do Sul. Lehmen focuses on addressing the specific environmental legal challenges and opportunities pertinent to the region, promoting sustainable practices and advocating for robust environmental protection policies. This leadership involves engaging with local authorities, legal professionals, and stakeholders to develop informed positions and provide expert guidance. The commission under Alessandra Lehmen's purview contributes significantly to the OAB's commitment to environmental stewardship and the responsible application of environmental legislation at the state level.

    Roberto Busato - Presidente Nacional

    Roberto Busato, the Presidente Nacional at Oab, directs the overarching strategy and national operations of the organization. Busato ensures adherence to the Federal Constitution, guiding the OAB's mission to represent and regulate the legal profession across Brazil. This leadership involves setting organizational priorities, fostering inter-regional collaboration, and upholding the highest ethical standards for legal practitioners. The Presidente Nacional oversees critical initiatives aimed at enhancing legal education and public access to justice, directly impacting the integrity and effectiveness of the Brazilian legal system. Roberto Busato's role is central to maintaining the OAB's authority and public trust.

    Rodrigo Karpat - Presidente Da Comissão De Direito Condominial OAB Conselho Federal 25 and 28

    Rodrigo Karpat, the Presidente Da Comissão De Direito Condominial OAB Conselho Federal 25 and 28 at Oab, spearheads the specialized commission focused on condominium law. Karpat guides the development of policies and best practices within this specific legal domain, ensuring that the OAB provides relevant expertise and support to legal professionals specializing in real estate and community association matters. This involves analyzing legislative proposals, organizing educational seminars, and addressing the unique challenges faced by lawyers in condominium disputes and management. The work under Rodrigo Karpat's direction contributes to the clarity and fairness of condominium legal frameworks throughout Brazil, supporting the organization's broader commitment to legal excellence.

    Ronaldo Tolentino - Presidente Da Comissão De Direito Do Trabalho Do CFOAB

    Ronaldo Tolentino, the Presidente Da Comissão De Direito Do Trabalho Do CFOAB at Oab, leads the national commission dedicated to labor law. Tolentino drives the OAB's engagement with critical issues affecting employment relations, workers' rights, and employer responsibilities across Brazil. This leadership entails reviewing and proposing labor law reforms, facilitating discussions among legal experts, and ensuring the organization's stance reflects current economic and social realities. The commission under Ronaldo Tolentino's guidance plays a vital role in shaping labor jurisprudence and supporting legal professionals navigating complex employment litigation and advisory services, reinforcing the OAB's commitment to justice and professional development in this key sector.
    Ronaldo Tolentino

    Stela Velter - Presidente De Comissão

    Stela Velter, the Presidente De Comissão at Oab, oversees a specific committee dedicated to advancing the OAB's objectives within its designated area of focus. Velter ensures the effective execution of the commission's mandate, which involves analyzing legal developments, proposing policy recommendations, and supporting members in specialized practice areas. This leadership role requires strategic planning and coordination to address the unique needs of the legal community served by the commission. Stela Velter's contributions are vital to the OAB's capacity to provide targeted expertise and uphold professional standards across its diverse operational domains.

    Marcos Meira - Presidente Da Comissão Especial De Direito De Infraestrutura Do Conselho Federal Da OAB

    Marcos Meira, the Presidente Da Comissão Especial De Direito De Infraestrutura Do Conselho Federal Da OAB at Oab, leads the special commission focused on infrastructure law at the federal level. Meira guides the organization's engagement with the complex legal frameworks governing major development projects, public-private partnerships, and regulatory issues within the infrastructure sector across Brazil. This involves fostering dialogue among experts, analyzing policy implications, and contributing to the development of sound legal principles for national infrastructure growth. The commission under Marcos Meira's direction plays a critical role in ensuring legal clarity and promoting best practices in a sector vital to the country's economic development.

    Eunice Schlieck - Presidente Comissão Nacional Da Advocacia Multiportas

    Eunice Schlieck, the Presidente Comissão Nacional Da Advocacia Multiportas at Oab, directs the national commission focused on multi-door dispute resolution advocacy. Schlieck champions the adoption and refinement of alternative dispute resolution (ADR) mechanisms, including mediation and conciliation, to enhance access to justice and promote efficient legal outcomes. This leadership involves developing strategies to integrate ADR practices more broadly within the legal system and providing training for legal professionals. The commission under Eunice Schlieck's guidance is essential in advancing the OAB's commitment to innovative legal solutions and reducing caseloads in traditional court systems, thereby improving the overall efficiency and accessibility of legal services in Brazil.

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    Frequently Asked Questions Regarding Oab Top Executives and Leadership Team

    Who leads Oab?
    Oab is led by Roberta Carlini (President, The Compliance & Esg Committee of The Brazilian Bar Association), along with executives such as Marco Araujo Junior (President) and Thabata Guimaraes (President of the Entrepreneurship Committee of the OAB and SBC).
    Who is part of Oab’s executive team?
    The executive team of Oab includes leaders such as Roberta Carlini (President, The Compliance & Esg Committee of The Brazilian Bar Association), Marco Araujo Junior (President), Thabata Guimaraes (President of the Entrepreneurship Committee of the OAB and SBC) and other senior executives.
    How many executives does Oab have?
    Oab has 10 executives leading key business areas.
    What roles are included in Oab’s leadership team?
    The leadership team of Oab includes roles such as President, The Compliance & Esg Committee of The Brazilian Bar Association, President, President of the Entrepreneurship Committee of the OAB and SBC, President, Environmental Law Commission, Rio Grande Do Sul Chapter, Presidente Nacional.