Senior Tax Consultant

Orbiss Inc. is a tax and accounting firm specializing in business growth in the United States. Launched in 2020, Orbiss has helped hundreds of small and medium-sized international companies scale up and thrive in the dynamic American market.

With a focus on personalized solutions, Orbiss offers fully tailored support for our clients’ cross-border tax, accounting, and consulting needs. Our vision is modernity, driving us to adopt an innovative approach that prioritizes process automation and quality assurance, while always keeping people at the heart of our mission.

At its core, Orbiss is an innovative, modern, young firm that believes an old industry can still learn new tricks. We prioritize the development of our people and are dedicated to guiding you through the learning process.

As a Senior Tax Consultant, you will be responsible for:

• Design and lead comprehensive U.S. and international tax planning strategies to High-net worth individuals and business structures.
• Lead cross-border reorganizations analyses and permanent establishment assessments.
• Provide senior-level guidance on tax treaty applications, FATCA, PFIC and CFC/GILTI regimes.
• Conduct detailed tax research and prepare technical memos on U.S. and international tax topics.
• Support the preparation of advisory deliverables related to personal and corporate structuring, and tax optimization.

• Own a portfolio of senior client relationships, serving as the main point of contact for tax matters throughout the fiscal year.
• Deliver clear, actionable advice on complex tax issues to C-suite executives, founders, and general counsel.
• Lead or co-lead client presentations, strategy sessions, and annual tax planning meetings.
• Advise tax strategies for wealth transfer, estate planning, and cross-jurisdictional compliance.

• Review and sign off on federal and state income tax returns, and international filings (5471, 5472, 8858, 8865).
• Monitor legislative and regulatory developments (IRS, Treasury Reg.) and translate their impact for clients in practical terms.

• Contribute to internal knowledge-sharing initiatives, technical memos, and client-facing educational content.

• Drive business development through proposals, speaking engagements, and thought leadership content; collaborate with senior partners on strategic client initiatives.

• Law degree with a specialization in tax law (Avocat fiscaliste, Master 2 Fiscalité internationale, LLM in Taxation, JD with tax focus, or equivalent). Bar admission (French, U.S., or other jurisdiction) is a strong plus;
• 2–5 years of experience in tax advisory in a law firm, Big 4, or boutique international tax practice.
• Demonstrated expertise in U.S. inbound/outbound tax matters, cross-border structures, and international tax frameworks.
• Hands-on experience with equity compensation plans (stock options, RSUs) and their cross-border tax implications.
• Exceptional written and verbal communication skills — able to translate dense tax analysis into clear client advice.
• Proficiency with tax research tools: Bloomberg Tax or CCH.
• French fluency is required given our international client base; Spanish, German, or other European languages are a plus.