Marco Antônio Junqueira de Arantes

COO (Chief Operating Officer) Legal Representation

Learn more about Marco Antônio

Marco Antônio Junqueira de Arantes

COO (Chief Operating Officer) Legal Representation

Partner since 2020, currently serving as COO of Legal Representation, leading advisory services for multinational companies operating in Brazil, with a focus on regulatory compliance and corporate governance.

A lawyer with solid experience in supporting the structuring of complex operations and maintaining direct communication with foreign investors. His work is centered on translating the intricacies of Brazilian legal frameworks into clear and strategic guidance, ensuring alignment between legal requirements and business goals.

Education

  • Law Degree – Federal University of Santa Catarina (UFSC), 2010
  • Specialization in Tax Law – IBET, 2012
  • Bachelor's Degree in Social Communication, 2008

Languages

  • English
  • Portuguese
  • Spanish

Publications

  • How to Understand Managers and Investors Liability in Brazil – 3rd Edition, 2023 (Amcham-Brazil)
  • Newsletter Recht & Steuern in Brasilien – 2nd Edition, 2022

In the Media

Our leadership team

Partner since 2012, currently serves as CEO, leading comprehensive legal representation and governance solutions for foreign companies. Creator of Sentinela®, a proprietary compliance and risk management platform.

CEO

Felipe G. M. Cargnin

Partner since 2013, serves as CFO, leading financial, strategic, and operational management. Experienced in legal representation of foreign companies, contracts, and integration of legal and administrative areas.

CFO

Bruno de Luca Zanatta

Partner since 2008, serves as CRO, leading institutional relations, business development, and international expansion strategies. Brings solid experience in law, management, and structuring foreign-owned companies in Brazil.

CRO

Ramon Fernandez Aracil Filho

Partner since 2020, serves as COO of Legal Representation, advising multinational companies in Brazil on compliance, deal structuring, and corporate governance.

COO Legal Representation

Marco Antônio Junqueira

Partner since 2020, leads the CoSec area as COO, with a focus on agility, excellence, and personalized service. Solid experience in Corporate Law and corporate reorganizations.

COO Corporate Secretarial Services

Jhessyka Pereira de Sousa

Partner since 2022, serves as COO of the Accounting area, with 30+ years of experience in BPO, M&A, and setting up international operations in Brazil. Specialist in high-impact projects for national and multinational companies.

Accounting & BPO

Luiz Flávio Cordeiro

Consultant since 2012, with over 50 years of experience. One of the visionaries behind the firm’s foundation, with broad expertise in tax, corporate, and legal matters for companies with foreign capital.

Consultant

Antonio Carlos Campos

Commercial representative of the group in the United Kingdom. Lawyer with solid experience in compliance and litigation.

UK Commercial Representative

Mathias Ehlert

Founder of Mourão Campos.

Founder

Maria Antonia Mourão Campos

With 15+ years of experience in commercial strategy, he leads business development, strengthening brand positioning and strategic partnerships.

Business Development Manager

Leandro Conte

With 12 years of experience in administrative, financial, and accounting management, Thais oversees Mourão Campos Group’s financial and administrative departments, ensuring efficiency, transparency, and strategic support to operations.

Administrative and Financial Manager

Thais Lino Silveira

With 9 years of experience in compliance, due diligence, and corporate law, Marina leads risk management, client onboarding, and the coordination of legal representation powers.

Legal Representation Coordinator

Marina Stroppa

With 15 years of experience in HR and payroll, Karoline aligns people management processes with the company’s strategic goals—focusing on organizational climate, legal compliance, and team development.

Human Resources Coordinator

Karoline Dias

Professional with 10 years of experience in corporate filings and company legalization. Focused on legal compliance and personalized client service.

Corporate Secretarial Coordinator

Carolina C. R. Heib

Professional with 20 years of experience in administrative, financial, and accounting areas. Leads the financial and administrative departments with a focus on efficiency, control, and business sustainability.

Administrative and Financial Manager

Rafael Ribeiro Egas

Lawyer, Master in Organizational Sociology, founder of CMT Advogados and AED Consulting. Serves as a board advisor to the group, bringing strategic insight and solid expertise in Corporate Law and Governance.

BoD Member

Rafael Bicca Machado

Trust built by those who know the market

More than experts, we are strategic partners. Our team combines decades of hands-on experience with cutting-edge technical knowledge to deliver solid, efficient, and tailor-made solutions. We operate with precision, proximity, and deep market insight because we know that trust is earned through execution.