Severiano Ortiz

Severiano Ortiz is a partner at MNF Legal PLLC, a Washington, D.C. tax boutique that supports U.S.-connected multinational families and businesses. The firm concentrates on cross-border tax planning and international compliance, helping clients coordinate their affairs across U.S. and foreign law. Its focused expertise in this demanding field underpins its recognition as Tax Law Firm of the Year in Washington DC at the Corporate INTL Global Awards 2026.

A cross-border tax boutique in the U.S. capital

MNF Legal describes itself as a tax boutique supporting U.S.-connected multinationals — both families and businesses. Operating from offices at 601 Pennsylvania Avenue in Washington, D.C., the firm is located at the heart of the U.S. capital, close to the institutions that shape federal tax policy and administration. Its boutique structure allows it to offer focused, senior-led attention to the specialised cross-border matters in which it concentrates.

The firm's clients are, by its own description, U.S.-connected but international in character: families and businesses whose ties span the United States and other jurisdictions. For such clients, tax planning is inherently complex, because it must reconcile the demands of the U.S. tax system — which reaches broadly across the worldwide affairs of U.S. persons — with the rules of the other countries involved. MNF Legal is built specifically to address this challenge.

Coordinated planning across jurisdictions

The firm's practice centres on cross-border tax planning and compliance for internationally connected individuals, families and businesses. Its core areas include cross-border income-tax planning, pre-immigration tax planning, expatriation tax planning, cross-border estate and gift-tax planning, and international compliance consulting. Each of these areas addresses a moment or structure where U.S. and foreign tax systems intersect and where careful, forward-looking planning can make a significant difference.

• Cross-border income-tax planning
• Pre-immigration tax planning
• Expatriation tax planning
• Cross-border estate and gift-tax planning
• International compliance consulting

A defining feature of the firm's approach is its emphasis on coordination. MNF Legal stresses that effective planning must account for both U.S. and non-U.S. law, and it works collaboratively with clients' existing advisers across the relevant jurisdictions. This is essential in cross-border tax work: a step that is efficient under U.S. law may create difficulties abroad, and only by considering both sides together can advisers achieve outcomes that are sound across all the systems that apply. Pre-immigration and expatriation planning, in particular, reward early, coordinated attention before a change in status occurs.

Recognised tax expertise in Washington DC

Recognition as Tax Law Firm of the Year in Washington DC reflects the firm's standing in a highly specialised area of practice. Cross-border tax planning demands not only deep technical knowledge of U.S. international tax rules but also the judgement to work across jurisdictions and the discipline to coordinate with other advisers. A boutique built entirely around these matters, led by partners immersed in the field, is well suited to meeting the needs of internationally connected clients.

For U.S.-connected families and businesses navigating the intersection of American and foreign tax law, Severiano Ortiz and MNF Legal offer focused, coordinated planning and compliance support from a Washington, D.C. base. The firm's recognition as Tax Law Firm of the Year in Washington DC at the Corporate INTL Global Awards 2026 underlines its reputation as a leading cross-border tax boutique.

As a partner, Severiano Ortiz works at the demanding frontier where U.S. and foreign tax systems meet, an area in which early, coordinated planning can spare clients significant difficulty later. For internationally connected families and businesses, the value of a boutique dedicated entirely to these questions — and committed to working alongside their existing advisers across jurisdictions — is considerable, and it is this focused, collaborative expertise that the award recognises.