Investor Relations
Tercio Borlenghi Junior founded Ambipar in 1995 and has served as President of the Board of Directors of Ambipar since 2020. Mr. Borlenghi holds a bachelor’s degree in law and has significant experience in commercial, operational and administrative areas.
Guilherme Patini Borlenghi has vast experience working at Ambipar, having spent the last thirteen years in various positions within the organization. Guilherme led strategic decisions relative to capital allocation and M&A, expanding and consolidating the position of Ambipar Response in the Brazilian market, and the entry and growth in global markets. Mr. Borlenghi graduated from the business school of Fundação Armando Alvares Penteado — FAAP.
Alessandra Bessa Alves de Melo has served as the chief legal officer of Ambipar since 2015. Ms. Melo joined the Ambipar Group in 2003 and has served in various roles in our legal department since then. Prior to joining the Ambipar Group, Ms. Melo worked as a lawyer in private practice from 1995 to 2002. Ms. Melo holds a bachelor’s degree in law from Universidade Paulista and an MBA in Business Management from Fundação Getúlio Vargas — FGV, as well as a postgraduate degree in Tax Law and a specialization certificate in Contract Law, both from Centro de Extensão Universitária — CEU.
Thiago da Costa Silva has served as the chief financial officer and chief investor relations officer of Ambipar since 2020 and has extensive experience in accounting, tax, planning and finance. Prior to joining Ambipar in 2014, Mr. da Costa Silva served as controllership consultant at Camargo Corrêa S.A. from 2012 to 2014, as a senior accounting analyst at the Camargo Corrêa Group from 2007 to 2012, and as an accounting analyst at Dispan Indústria e Comércio Ltda. from 2003 to 2007. Mr. da Costa Silva holds a bachelor’s degree in accounting from Centro Universitário Salesiano de São Paulo — UNISAL and a graduate degree in strategic accounting management and international accounting from Pontifícia Universidade Católica de Campinas — PUC/Campinas.
Victor Almeida has served as a partner at Opportunity, a private equity firm in Brazil, targeting acquisitions in a diverse number of sectors, since 2020, having initially joined as an analyst in 2014. Mr Almeida currently serves on the board of directors of Belem Bioenergia, one of Brazil’s biggest palm oil companies, having previously served as a member of Belem Bioenergia’s senior executive management between 2019 and 2021. Between 2016 and 2018, Mr. Almeida served as a member of the board of directors of Bemisa — Exploração Mineral. Mr. Almeida has a bachelor’s degree in economics from Universidade Federal da Bahia.
Marco Antonio Zanini was graduated in Accounting from the Pontifical University of Campinas and Bachelor of Law from Universidade Metodista de Piracicaba. Since 1986, he has worked at Zanini Audit Fisco Contábil, a company specialized in auditing, having also worked at Reratex Comercial e Imobiliária Ltda. from 2002 to 2012.
Marco Antonio Zanini was graduated in Accounting from the Pontifical University of Campinas and Bachelor of Law from Universidade Metodista de Piracicaba. Since 1986, he has worked at Zanini Audit Fisco Contábil, a company specialized in auditing, having also worked at Reratex Comercial e Imobiliária Ltda. from 2002 to 2012.
Dennys Spencer de Maio has served as Global Head of Emergency Response since March 2025. Mr. Spencer joined Ambipar in 2008 and has held several key leadership roles, including chief operating officer of Ambipar Group from 2020 to June 2023, and head of engineering of Ambipar Response S.A. prior to that. Mr. Spencer has over 20 years of experience in managing large-scale environmental projects and hazardous materials emergency response operations. Mr. Spencer holds a bachelor’s degree in Chemical Engineering from Faculdades Oswaldo Cruz, a bachelor’s degree in Geography from the University of São Paulo (USP), a master’s degree in Environmental Engineering and Technological Risk Analysis from École des Mines d’Alès (France), a master’s degree in Hazardous Waste Management from the University Grenoble Alpes (France), and a master’s degree in Soil Contamination Engineering from the University of São Paulo (USP).