WHO WE ARE
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At Yellowstone, our team combines international expertise, legal knowledge, and cross-border experience to guide clients with clarity and confidence.
We approach every relationship with a client-first mindset, tailoring solutions to protect wealth, support governance, and plan for future generations.
Our culture values independence, discretion, and long-term thinking, ensuring every decision is made with integrity and care.
With decades of experience in trust administration, succession planning, and cross-border wealth management, we bring the skills and perspective to help clients navigate complexity with ease.
Florencia Ribes
Chief Executive Officer (CEO)
Florencia is a corporate attorney with more than 25 years of international experience advising high-net-worth families and closely held businesses on trusts, fiduciary governance, and cross-border wealth planning.
As Chief Executive Officer, she leads the firm’s strategic vision, institutional development, and fiduciary oversight. She has extensive experience building and leading multidisciplinary teams, developing fiduciary platforms, and structuring organizations designed to serve families and their advisors across jurisdictions.
Her work combines legal expertise with a practical business approach, focused on building strong fiduciary organizations, strengthening clear governance frameworks, and guiding families in the management and long-term preservation of their wealth.
She is based in Miami, Florida, and is fluent in English and Spanish.
Valentina Martinez-Tenorio
Chief Trust Officer (CTO)
Valentina is an International Corporate Attorney with over 30 years of experience, focused on business strategy, M&A, joint ventures, due diligence, and international negotiations. Her expertise spans complex cross-border transactions and fiduciary oversight, performing her sensitive duties with independence, rigor, and an unwavering commitment to the best interests of our clients.
She regularly engages at the executive and board level, offering independent judgment and governance-focused perspective on matters involving significant financial, organizational, and reputational considerations.
Her approach emphasizes accountability, long-term stewardship, and disciplined oversight, ensuring that complex structures and transactions are managed with clarity and integrity.
MANAGEMENT TEAM
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Yulia Piazza
Chief Private CLient Officer (CPCO)
Yulia Piazza has more than 15 years of experience working with international private clients and supporting complex financial and administrative structures for high-net-worth individuals and families.
Her background includes private client services, asset management support, and coordination of banking and financial relationships.
Yulia brings a strong client-focused approach and extensive experience assisting globally mobile families with cross-border financial matters.
She is based in Cody, Wyoming, and is fluent in English and Ukrainian.
Brian Ezequiel Bronzel brings extensive experience in financial strategy, business development, and international client advisory. His professional background focuses on identifying growth opportunities, building strategic partnerships, and supporting the expansion of financial and fiduciary services for international clients.
He contributes a strong commercial perspective to the firm, supporting its strategic growth and international client and domestic relationships.
He is based in Miami, Florida, and is fluent in English, Spanish and Portugues.
Chief Strategy and Business Development Officer (CSBDO)
Brinan Ezequiel Bronzel
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CONTUCT US
Phone:
+1 (307) 335-4125
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1012 12th Street, Cody, WY 82414
Physical Address:
Mailling Address:
1108 14th Street, Box 114, Cody, Wyoming 82414
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