Sion Advogados stands out for its consistent technical excellence and multidisciplinary approach, offering strategic legal solutions in various areas of law. Its performance in the environmental and mining sectors deserves special recognition, where it combines in-depth technical knowledge, practical vision, and complete adherence to regulatory and market dynamics.

However, limiting the firm’s excellence to its expertise would only reiterate what is already widely validated by rankings and specialized publications, such as Análise Editorial and The Latin American Lawyer.

A key differentiator is the high level of availability and approachability of the founding partner, Alexandre Sion, whose accessible and direct approach strengthens the relationship of trust with clients. This proactive presence significantly contributes to greater agility, a better understanding of strategic demands, and a level of service above average.

The combination of technical expertise, strategic vision, and highly personalized service positions the firm as a trusted legal partner, capable not only of ensuring compliance but also of generating concrete value for the business.

I’ve had the opportunity to be treated by Dr. Alexandre and his team on various occasions, always with a high level of excellence, professionalism, and attention to the client’s needs. He is a highly respected professional in the legal field, with extensive experience and recognized authority in the environmental field. His practice is guided by technical rigor, ethics, and a commitment to results.

Alexandre Sion is a professional I have had the pleasure and privilege of working with. First, together at Vale and then as a direct report at MMX and Anglo American. Leadership and the ability to manage people and strategic projects are natural abilities. He is an excellent professional and a person of integrity in his values and convictions, with intense experience in the law.

Alexandre is an outstanding student. During the time we studied together in Davis, California, I could realize that he is very disciplined, organized and is always looking for opportunities to learn and share knowledged with his colleagues. I should also mention his extra class behavior – he was perceived as a leader, organizing activities and always being available to help and cooperate with his classmates.

I can most certainly recommend Alexandre as a highly skilled and efficient lawyer who has deep knowledge in international commercial law and especially environmental law issues. As a person Alexandre is very outgoing and social with good teamwork skills.

Alexandre is a first-rate professional. I had the great opportunity to work with him at Vale, me in the maintenance department and him in the legal department. Whenever I turned to him, he was always able to give me answers in a short space of time, with a great deal of background information, so that we were always on the right side of the situation. He is ethical, proactive and keeps up to date.

Highly focused and extremely dedicated, ALexandre is certainly one of the best in-house lawyers I have ever met. I strongly recommend him in the environmental law field.

Dr. Alexandre Sion is focused on results and excellent customer service. With a systemic vision, he directs his processes and management in a coherent manner. I had the great pleasure of working with him at Vale, when we exchanged a lot of knowledge in everyday situations and in crises. I recommend this professional.

Alexandre is a good lawyer and a good manager, who is making a valuable contribution to our company.

Alexandre is a great friend. He is an excellent professional and very determined in his goals. I’ve been following his professional life for 5 years now and I can say that his career is on the up and up. I recommend him highly!

Alexandre Sion is one of the best professionals I have ever had the opportunity to work with. An in-depth student of environmental law, he has a mastery of the subject like few others, as well as an excellent strategic ability to handle high-profile cases.

Alexandre is a distinguished professional with whom I would like to have the opportunity to work again. In addition to his mastery of his field, he has a unique ability to manage teams and a natural ability to positively influence his colleagues. Dynamic and with a strong systemic vision of the business, Alexandre exceeds expectations with his commitment and dedication.

Alexandre is one of the most talented people I’ve ever met. He not only works hard, he also works smart. I strongly recommend him as the best lawyer.

Alexandre is an excellent person to work with and who I totally trust. He is an important person to support businesses because his respect to others, knowledge and competence to analyze scenarios and give the correct answers.

I strongly recommend Alexandre Sion as a competent legal manager.

excellence in environmental law. Vast experience, acquired in the corporate world and law firms, which allows him the versatility to deal with diverse areas related to environmental law, with regulatory law, in general, being his great differential.

Alexandre Sion is an extremely dedicated legal professional, committed to the desired results, who does not bend when faced with difficulties. At Anglo American, where I had the opportunity to work with Alexandre, I always noticed that he was not only a helpful person, but also an expert in the cases that arose, providing well-directed actions to defend the company.

Alexandre Sion has numerous professional qualities, and stands out for his commitment and technical quality, which few lawyers in this country possess.

Alexandre is a professional focused on results. He builds good relations in his workplace and he has great ability to find simple solutions to complex problems.

Alexandre and the whole team are fantastic professionals with focus and knowledge, who exhaustively and tenaciously seek solutions to their clients’ problems in a concrete and objective manner, always with great ethics, strategic vision and common sense. Thank you for all these years together on this journey!

The very high level of quality of the services provided to us so far, in which the punctuality, expertise, accessibility and availability of the firm’s professionals, as well as the influence that this firm has in the environmental community, have always deserved special mention.

Alexandre Sion is a lawyer of great technical ability, easy rapport and an expert in supporting companies in complex cases. I am happy to recommend him.

Alexandre is a very complete professional, with a strong technical background and a strategic, results-oriented vision. He always adds a lot to our projects and is a great professional to work with.

Alexandre is an excellent professional, very competent, ethical, dedicated and always committed to exceeding expectations. Highly trained in environmental and contractual issues. An attentive, available professional with excellent interpersonal skills.

Alexandre Sion is an extremely qualified professional and a national reference on environmental issues. His firm is made up of top-level professionals who add value to clients’ businesses. Quality, management and strategy.

I worked as a contract lawyer for Vale do Rio Doce when Alexandre was VALE’s General Counsel. Always attentive to detail, Alexandre Sion combines technical competence in law with extreme attention to the legal strategies to be adopted in each case, which is the result of his thoughtful personality, acute intelligence and sensitive spirit.

During our years studying together, Sion was one of the most intelligent, prepared and dedicated student, if not the best one. I was really glad to know that he has been approved in the bar exam with great grades and that he started to work in respectful companies for the last years. I can easily say that whoever decided to be represented by him, will be in very good hands.

Alexandre has extensive experience in managing corporate legal processes. It has a deep understanding of the legal matters and recognized leadership to conduct high-level team and focus on results

Alexandre is an exceptional lawyer !!! Brilliant in everything he does, dedicated and insightful in everything he touches ! It’s brilliant how far you’ve come! And you’ll go much further, I’m sure !!! Bravo to see all this !!! Brilliant !!! Big hug !

Alexandre is a brilliant professional. His perspicacity in combining a deep knowledge of the mining sector, his competence in the areas of Environmental and Mining Law, combined with his ability to build excellent relationships, makes him stand out in his field. This combination, together with his availability and active leadership in dealing with demands, produces excellent results.

Alexandre is very dedicated, attends to his clients in real time, helpful and attentive, a good professional ?

Alexandre was an excellent working partner and very dedicated in his field. He was always a legal reference for all of us.

Alexandre Sion impressed me significantly […] when we worked together. He had a difficult position, with many challenges in the legal field, and he did well, demonstrating […] a good understanding of the business as a whole.

Sion is a competent and multifaceted professional. As a postdoctoral fellow at the University of Salamanca, Spain, he has proven to be an innovative and dedicated researcher; as a teacher, I had the opportunity to be his student on the Environmental Law course, he has a great ability to transmit knowledge, to capture everyone’s attention with a dynamic and participatory class and to foster the creation of a network of professionals among his students.

A professional of the highest competence with whom I had the pleasure of working at Vale. Alexandre was always very helpful with his expertise, always proactive, flexible and transparent. On a personal level, he was an excellent person, always in a good mood and willing to help.