Senior Tax Manager (North America)

Senior Tax Manager Location: London, UK

Shape the Future of Tax Leadership in a Global Organization

Are you a senior tax professional looking to move beyond compliance into a highly visible, strategic leadership role? This is an opportunity to become the primary tax lead for North America while working from London as part of a globally connected tax function. You'll influence critical business decisions, support transformation initiatives, mentor team members, and partner directly with global tax leadership to drive innovation, governance, and operational excellence across a complex multinational business. If you're excited by the prospect of combining technical tax expertise with business partnering, technology transformation, and leadership development, this role offers a unique pathway toward broader global tax leadership.

Why This Role Matters

Tax is a strategic enabler of business growth, transformation, and risk management. As Senior Tax Manager – North America, you will serve as the key tax advisor for US and Canadian operations, ensuring compliance, strengthening governance, supporting commercial decision-making, and helping shape the future of tax processes through automation and responsible AI adoption. This role offers direct exposure to senior global leadership, including mentoring from the Global Head of Tax, while contributing to major initiatives such as ERP transformation, legal entity simplification, and tax technology modernization.

What Your Impact Is

• Lead North America's corporate tax compliance, tax accounting, and indirect tax activities.
• Serve as a trusted advisor to Finance, Legal, Commercial, and operational stakeholders.
• Drive tax governance, process improvement, and risk management across the region.
• Support strategic business initiatives, including acquisitions, restructurings, and ERP transformation programs.
• Develop and mentor an Indirect Tax Analyst while building a high-performing tax function.
• Advance automation, digital tools, and AI-enabled solutions that improve efficiency, controls, and reporting.
• Help position tax as a proactive business partner that supports sustainable growth and operational excellence.

What You'll Bring

• Required Bachelor's degree in Accounting, Finance, Taxation, or a related discipline.
• 8+ years of progressive tax experience with significant US federal and state corporate tax expertise.
• Strong knowledge of US corporate income tax compliance and tax accounting, including ASC 740.
• Working knowledge of IFRS tax reporting.
• Experience with US sales and use tax and broader state and local tax matters, including property taxes, gross receipts taxes, transaction taxes, and business licenses.
• Proven experience reviewing work, managing priorities, and developing team members.
• Experience managing external advisors and engaging with tax authorities.
• Strong analytical, organizational, project management, and communication skills.
• Excellent judgment, attention to detail, and the ability to manage multiple priorities in a fast-paced environment.
• Preferred CPA, MST, or equivalent professional qualification.
• Experience with Canadian corporate tax and/or indirect tax matters.
• Background within a multinational or professional services environment.
• Exposure to mergers and acquisitions, restructuring, transfer pricing, cross-border tax matters, and contract review.
• Experience supporting ERP implementation, finance transformation, or process redesign initiatives.
• Familiarity with Microsoft Dynamics 365, SAP, Oracle, or other major ERP platforms.
• Advanced Excel and experience leveraging tax technology, data analytics, workflow, or reporting tools.
• Interest in emerging technologies, automation, and responsible AI applications within tax functions.

Key Responsibilities

Corporate Tax Compliance & Tax Accounting

• Lead US federal, state, and local corporate tax compliance activities and oversee Canadian tax compliance processes.
• Prepare and review North American tax provisions under ASC 740 and IFRS.
• Manage quarterly tax account reviews, reconciliations, estimates, deferred tax balances, and return-to-provision adjustments.
• Develop annual tax budgets and cash tax forecasts.
• Oversee statutory tax reporting requirements, including information filings where applicable.
• Manage tax authority inquiries, examinations, notices, and payment matters.

Indirect Tax Leadership & Team Management

• Oversee governance and compliance for sales and use tax, property tax, gross receipts tax, business licensing, and related indirect tax obligations.
• Lead, mentor, and develop the Indirect Tax Analyst.
• Review filings, reconciliations, audit support, journal entries, and tax reporting workpapers.
• Provide technical direction on taxability determinations, filing positions, and audit strategies.
• Manage responses to indirect tax audits and regulatory inquiries.
• Support Canadian GST/HST and other indirect tax matters in collaboration with external advisors.

Business Partnering & Advisory

• Review contracts, master service agreements, statements of work, and commercial arrangements to identify tax implications and risks.
• Advise stakeholders on tax-efficient structures, risk mitigation, pricing considerations, and compliance requirements.
• Assess cross-border tax exposures, including withholding tax, permanent establishment, payroll, and treaty considerations.
• Build strong partnerships with Finance, Legal, Commercial, and operational teams.

Strategic Projects & Transformation

• Support acquisitions, integrations, disposals, and corporate restructurings.
• Contribute tax expertise to legal entity rationalization initiatives.
• Partner with Global Tax and Finance Transformation teams on ERP replacement and process redesign projects.
• Define tax requirements, support testing activities, and ensure tax considerations are embedded in future-state systems and controls.
• Help drive tax technology modernization and automation initiatives.

Global Collaboration & Stakeholder Management

• Manage relationships with external tax advisors and service providers.
• Collaborate closely with the Global Tax team on transfer pricing, governance, technical matters, and transformation initiatives.
• Act as the primary escalation point for North American tax issues.
• Communicate complex tax matters clearly and effectively to both tax and non-tax stakeholders.

Governance, Technology & Continuous Improvement

• Strengthen tax controls, governance frameworks, and documentation standards.
• Develop policies, procedures, filing calendars, and process guidance.
• Standardize and automate recurring tax processes.
• Monitor legislative and regulatory developments across the US and Canada.
• Identify opportunities to improve efficiency through technology, analytics, automation, and AI-enabled solutions.

Why Join ERM?

At ERM, you'll join a purpose-driven global organization where tax plays a critical role in enabling business success. You'll gain exposure to international leadership, contribute to large-scale transformation programs, mentor emerging talent, and help shape the future of a modern, technology-enabled tax function. This is more than a tax compliance role. It's an opportunity to influence strategy, drive innovation, and accelerate your journey toward senior tax leadership.

ERM is committed to creating an inclusive workplace where everyone feels valued, respected, and empowered to thrive, it’s an essential part of what makes ERM a great place to build a career and helps us create better solutions for our clients. We welcome talent from all backgrounds and provide equal opportunities for every candidate. If you have a disability, are neurodivergent, or need accommodations during the selection process, we’re here to support you. Our commitment doesn’t stop at hiring. Once you join us, we’ll ensure you have the tools, support, and adjustments needed to succeed and feel a true sense of belonging. Learn more about our Diversity, Inclusion & Belonging (DIB) efforts by visiting our website or exploring our 2025 Sustainability Report.

At ERM, sustainability is our business. We are the world's largest advisory firm focused solely on sustainability, offering unparalleled expertise across business and finance. ERM partners with clients to operationalize sustainability at pace and scale, through our unique combination of strategic transformation and technical delivery capabilities. Our diverse global team of experts works with the world's leading organizations to help them set clear sustainability targets, measure progress and operationalize strategy through deep implementation and business transformation. With more than 50 years of experience, our ability to integrate sustainability solutions and our depth and breadth of technical knowledge are why organizations choose to partner with us as their trusted advisor. Every one of us firmly believes in the potential to create value for our clients through an integrated approach to sustainability (because we have personally seen it and professionally achieved it). Our team members are passionate about client service. We work closely with our clients to help them operationalize their sustainability goals and meet their environmental, health and safety objectives while advancing ERM’s purpose through delivering tangible progress in what the United Nations coined The Decade of Action. Organizing our people across globally integrated communities of technical and strategic talent positions ERM to be a boots to boardroom leader in bringing that value creation to our clients, partners, and the world. We recruit exceptional professionals with a personal and professional passion for sustainability and nurture them to even greater success as specialists. We prepare our consultants to bring integrated, innovative and sustainable solutions to our clients and provide opportunities for ongoing development across a variety of subject areas related to technical, business, and personal growth. At ERM, effort pays off and becomes career defining work that leaves a positive imprint on our planet.

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