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International Tax Architecture & Institutional Readiness
Global advisory firm supporting domestic and international enterprises across growth, expansion and complex cross-border requirements.
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AVZIRE
International Tax Architecture & Project Finance Readiness
Independent advisory focused on complex, cross-border, and institutional initiatives
Leadership
Executive Leadership and Advisory Governance
Leadership
Nelson E. Rincon
Founder, Chairman & Chief Executive Officer
International Tax Architecture
Nelson E. Rincón is the Founder, Chairman and Chief Executive Officer of AVZIRE and a senior international tax professional with more than 35 years of experience advising multinational corporations, privately held enterprises and family offices on complex cross-border structures and restructurings. His work is grounded in international tax architecture, including income allocation, risk management and multi-jurisdictional structuring.
His multidisciplinary background spans international tax strategy, M&A, due diligence, corporate finance, financial analysis and global entity structuring. He has advised Fortune 100 and multinational enterprises across energy, industrials, manufacturing, consumer goods and financial services, integrating tax considerations into broader corporate, transactional and operating frameworks.
A former Deloitte International Tax Partner and senior multinational corporate finance executive, Nelson held international tax leadership responsibilities in both the United States and Venezuela, with regional responsibilities across Latin America for major multinational accounts. His career has also included senior operating and financial leadership assignments across Latin America, Europe and other markets, including responsibility for complex organizations operating under significant economic and regulatory pressure.
Nelson is recognized for analytical rigor, disciplined judgment and the ability to simplify complex international tax and structural issues in high-complexity environments. He holds a Bachelor of Science in Public Accounting and a Master of Science in Taxation from the University of Miami and is fluent in English, Spanish and Portuguese.
Eysa Reyes-Rincon
Chief Operating Officer
Enterprise Operations & Cross-Border Advisory
Eysa Reyes-Rincón is the Chief Operating Officer of Avzire Consulting LLC, with more than 25 years of experiencein corporate finance, international taxation, and organizational leadership across multinational environments.
Her background includes senior financial and administrative roles within global corporations, where she oversaw financial reporting, compliance processes, and internal controls. She also served as Tax Director in Deloitte Venezuela’s Global Employer Services practice, advising multinational clients on expatriate taxation, global mobility programs, treaty application, and cross-border compliance.
Eysa has held senior leadership roles in the telecommunications sector, including serving as country controller following a major acquisition, and has supported the establishment of a private credit financial company in Panama, contributing to regulatory compliance and operational readiness.
At Avzire, she supports execution discipline, engagement governance, and operational alignment across global tax, project finance readiness, and organizational advisory engagements.
She holds a Bachelor of Science in Public Accounting and a Master of Science in Professional Management from the University of Miami.
Advisory Board
Advisory Board members serve in a non-executive, advisory capacity, providing strategic insight, sector-specific perspective, and experienced judgment. They do not participate in day-to-day management or act on behalf of the firm unless expressly authorized.
Scott G. Byrnes
Advisory Board Member - Oil and Gas
Scott G. Byrnes is a senior petroleum engineering professional with more than 45 years of experience across onshore U.S. and Gulf of Mexico oil and gas operations, bringing deep expertise in reservoir engineering, field development, asset evaluation, and energy infrastructure.
His background includes senior technical and managerial roles supporting property acquisitions, divestitures, and development initiatives for oil and gas operators. He is the President of Burks Oil & Gas Properties, Inc., a Houston-based firm providing engineering and advisory services to the energy sector, and has been actively involved in the evaluation and execution of complex oil and gas transactions.
Earlier in his career, Scott held senior engineering positions with Agip Petroleum (now ENI) and other energy companies, where he supported significant acquisition and development programs, as well as roles focused on reservoir and pipeline engineering.
At Avzire, Scott serves as an Advisory Board member, contributing technical judgment, reserve evaluation insight, and asset-level expertise to oil and gas–related advisory and project readiness engagements.
He holds a Bachelor of Science in Civil Engineering and completed post-baccalaureate studies in Petroleum Engineering. He is a registered Professional Engineer in Texas and a long-standing member of the Society of Petroleum Engineers.
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Geoffrey Baker
Advisory Board Member – Energy & Natural Resources
Geoffrey is a senior international finance professional with specialization in energy, natural resources, and oil and gas markets, bringing experience across investment structuring, physical commodities, and advisory work in global energy sectors.
His background includes facilitating direct investments and advisory mandates in oil and gas projects, as well as involvement in physical commodities offtake and fixed-income structures linked to producing assets. He has also worked in energy consulting roles and has experience with investment structures supported by producing oil and gas resourcesassessed under recognized reserve reporting standards.
Geoffrey has held senior roles within energy-focused investment and advisory organizations, including leadership responsibilities within energy-oriented funds and capital advisory platforms. He currently serves as a senior member of Avzire’s energy markets team, supporting international market development and engagement with global capital sources, and acts as an Advisory Board member to the firm.
He holds academic training in industrial design from the College for Creative Studies in Detroit, Michigan, and completed undergraduate studies in communications, English, and psychology.
Senior Advisors
Senior Advisors contribute technical, regional, or subject-matter expertise in a consultative role. They do not hold executive authority and do not represent the firm in an operational or fiduciary capacity.
Bryan Jarrard
Senior Advisor - International Tax (United States)
Brian Jarrard is a senior international tax and accounting advisor with more than 20 years of experience, including extensive leadership roles within Big Four professional services and multinational operating environments.
He spent a decade leading the global tax functions of two oilfield services companies, supporting complex U.S. and cross-border tax matters, corporate structuring, and operational tax governance in capital-intensive industries. Earlier in his career, Brian worked at Deloitte, advising multinational clients on tax compliance, planning, and financial reporting matters.
Brian holds a Master’s degree in Taxation from the University of Southern California, Marshall School of Business, and a Bachelor’s degree in Accounting from the University of Texas at Austin, McCombs School of Business. At Avzire, he serves as Senior Advisor for the United States, contributing technical judgment and operating-company perspective to international tax and institutional readiness engagements.
John Linders
International Tax Senior Advisor European Region
John Linders is a senior international tax advisor with extensive experience advising European and multinational corporations on direct tax matters, including reorganizations, mergers, and cross-border acquisitions.
He has served as a regional partner at leading global professional services firms, including Deloitte, BDO, and Ryan, advising Dutch and foreign multinational groups, including Fortune 500 companies, on complex European tax structures and transactional matters.
John is an attorney at law and holds a Master of Science in Economics from Erasmus University, Rotterdam, The Netherlands. At Avzire, he serves as Senior Advisor for the European region, contributing technical judgment and regional expertise to international tax and cross-border structuring engagements.