US / UK Tax Director – Partner Job Type: Full Time, Permanent Location: Mayfair, London Salary: £CompetitiveAbout Us Established in 1975, Sopher Co is a trusted adviser to high net worth individuals, entrepreneurs, expats, and owner-managed businesses. Known for our expertise in media, entertainment, and over 20 other industries, we pride ourselves on a people-first culture and a commitment to delivering exceptional client experiences. With offices in Elstree and Mayfair, we continue to grow and invest in top talent that shares our values and ambition.The Opportunity We are looking for a senior-level US / UK Tax Director – Partner to join and lead our specialist dual-handling tax team in Mayfair. This is a high-impact leadership role, reporting directly to the CEO, and ideal for an accomplished tax professional with deep cross-border experience and a passion for developing teams and client relationships. You’ll be responsible for strategic direction, technical delivery, and continued growth of the practice.Key Responsibilities Provide inspirational leadership to a growing team of US / UK tax professionalsOwn the financial performance of the group — including WIP management, billing, annual quoting and cash collectionPlay a key role in marketing, business development, and brand visibility — both internally and externallyDeliver high-quality, timely outputs on complex technical tax matters, including treaty claims, CGT, and non-dom issuesOversee the full cycle of US and UK annual tax return processesManage high-level IRS and HMRC enquiries and lead resolution of complex client casesGuide, train and support junior staff, creating a high-performance culture through coaching and structured developmentEnsure all deliverables are accurate, compliant, and meet the high standards expected of our clientsDrive team learning and ensure continuous professional development across all levels What We’re Looking For A minimum of 15 years' experience in professional tax practiceDeep knowledge of US and UK tax legislation, with specialist expertise in cross-border personal taxationProven leadership and people management skills — including delegation, performance monitoring, and deadline managementBachelor’s degree in Commerce or equivalentPostgraduate tax qualifications CPA, EA, JD or equivalentAdvanced technical proficiency in Microsoft Excel and tax software including CCH and Virtual CabinetHighly organised, proactive, and confident working with HNW and confidential clienteleStrong written and verbal communication skills with stakeholders at all levelsA positive role model who supports a collaborative and high-integrity culture What We Offer A senior leadership role in a prestigious, client-focused firmCompetitive remuneration and extensive executive benefitsThe opportunity to shape the future of a thriving tax divisionA warm, collaborative and high-achieving team cultureOngoing professional development and trainingA diverse and exciting client portfolio that few firms can match Join Us If you're ready to make a significant impact at a leading firm that values expertise, innovation, and integrity, we want to hear from you.