A leading professional services firm seeks a Tax Senior Manager for Global Mobility Services in London. Manage high‑profile corporate client portfolios, deliver expert advice on complex global mobility issues, drive business development, mentor teams, and ensure operational excellence. Enjoy flexible working, generous pension, and a collaborative, growth‑focused environment. Ideal for passionate leaders committed to exceptional client service and industry impact.
Tax Senior Manager Global Mobility Services
Salary: Competitive and based on experience
Location: London
A leading professional services organisation is seeking a Tax Senior Manager for their Global Mobility Services practice in London. This role offers you the opportunity to manage a portfolio of high‑profile corporate clients, providing expert technical advice and strategic guidance on complex global mobility issues. You will play a pivotal part in shaping business development activities, mentoring a talented team, and ensuring operational excellence across all engagements. The organisation is renowned for its commitment to professional growth, offering flexible working opportunities, generous pension contributions, and access to extensive training programmes. If you are passionate about delivering exceptional client service and thrive in an environment that values collaboration, knowledge sharing, and supportive leadership, this is your chance to make a significant impact within a respected industry leader.
You will be responsible for managing key corporate client relationships, acting as a trusted advisor on intricate global mobility matters while proactively resolving escalations and ensuring client satisfaction.
The role provides the opportunity to lead business development initiatives, contribute to the creation of new service offerings, and support technology‑driven solutions within the Global Mobility Services practice.
You will oversee operational activities, mentor team members, and ensure compliance with regulatory standards—all within an organisation that prioritises flexible working arrangements and ongoing professional development.
What you’ll do:
As a Tax Senior Manager Global Mobility Services based in London, you will immerse yourself in managing a diverse portfolio of corporate clients who rely on your expertise for navigating complex international tax scenarios. Your day‑to‑day responsibilities will involve acting as a trusted advisor—offering strategic guidance on cross‑border assignments, structuring executive packages for tax efficiency, and overseeing multi‑jurisdictional advisory projects. You will collaborate closely with colleagues across departments to deliver tailored solutions that address each client’s unique needs. In addition to client‑facing duties, you will drive business development efforts by identifying new opportunities within existing accounts and contributing to innovative service offerings. Operationally, you will ensure seamless delivery by mentoring your team members, maintaining financial hygiene across engagements, and upholding compliance standards. Your ability to communicate clearly with stakeholders at all levels—both internally and externally—will be crucial in fostering strong relationships and achieving successful outcomes.
Manage a portfolio of key corporate clients within the Global Mobility Services practice, serving as their primary point of contact for complex cross‑border tax matters.
Provide senior support for core business development opportunities by leveraging your technical expertise and insights into client needs.
Contribute to the design and implementation of strategic initiatives and new service offerings that address evolving challenges in global mobility.
Identify and pursue wider People Taxes opportunities with existing clients to expand service reach and add value.
Enhance brand visibility by supporting eminence plans, engaging regularly on social media platforms, and attending industry events to represent the practice.
Proactively manage client escalations, resolve issues efficiently, and maintain high levels of client satisfaction and retention.
Deliver sign‑off on complex technical advice, ensuring accuracy, compliance with regulations, and alignment with client objectives.
Lead tailored tax briefings and training sessions for both clients and internal team members to foster knowledge sharing.
Oversee operational activities within the team, ensuring efficiency, effectiveness, and alignment with strategic objectives.
Mentor team members by providing guidance, support, and development opportunities to nurture a high‑performing group.
What you bring:
To excel as a Tax Senior Manager Global Mobility Services in London you will bring substantial experience advising on global mobility matters—particularly those involving intricate residency cases or cross‑border assignments. Your proven ability to lead tailored briefings for senior executives ensures clarity around risk factors while keeping discussions focused on what matters most. You have demonstrated confidence when structuring executive packages for maximum tax efficiency across various jurisdictions. Your familiarity with UK taxation rules affecting business travellers—such as double tax treaties or payroll reporting requirements—enables you to offer comprehensive advice that addresses every aspect of international assignments. You are adept at analysing issues related to social security or payroll arising from dual contracts or commuter arrangements; your insights help clients navigate these complexities smoothly. Beyond technical expertise you possess strong leadership qualities: motivating teams through mentorship while fostering an inclusive environment where everyone feels supported. Your communication skills allow you to build lasting relationships with stakeholders at all levels—ensuring trustworthiness throughout every engagement. Finally your organisational abilities mean you can juggle multiple projects without compromising quality or attention.
Ability to analyse highly complex residency cases and provide clear advice tailored to individual circumstances.
Expertise in leading tailored tax briefings for senior executives while covering all relevant risk factors without losing focus on key points.
Confidence in advising on executive assignment structuring and redesigning packages for optimal tax efficiency across multiple jurisdictions.
Experience preparing and reviewing detailed disclosures to HMRC (PAYE and Self Assessment), ensuring full compliance with UK regulations.
Awareness of non‑UK technical changes relevant to global mobility clients and their implications for cross‑border assignments.
Detailed knowledge of UK taxation rules affecting business travellers, non‑resident directors, remote workers—including double tax treaties, economic employer rules, 60‑day rule—and payroll reporting requirements.
Ability to analyse tax, social security, payroll issues arising from cross‑border working arrangements such as dual contracts or commuter agreements; providing strategic solutions that are easy for stakeholders to understand.
Good knowledge of international pensions rules applicable to globally mobile employees.
Familiarity with GMS technology tools including LINK Go, GET, GPM and BT; able to leverage these tools effectively in client engagements.
Strong awareness of social security rules including the Posted Worker Directive; able to advise clients on policy updates referencing wider market trends.
Leadership skills demonstrated through experience managing teams; ability to motivate others towards shared goals while nurturing talent through mentorship.
Proven track record contributing to business development initiatives; achieving sales targets through collaborative approaches rather than competitive tactics.
Excellent communication skills enabling you to build strong inter‑personal relationships with clients and colleagues both locally and globally.
Critical thinking abilities allowing you to provide practical solutions for complex challenges within the GMS market without losing sight of key priorities.
Exceptional organisational skills enabling you to manage multiple projects simultaneously while maintaining attention to detail.
What sets this company apart:
This organisation stands out as one of the most respected names in professional services worldwide—renowned not only for its technical excellence but also its commitment to employee wellbeing. Here you’ll find flexible working opportunities designed so you can balance personal commitments alongside professional ambitions. Generous pension contributions reflect their dedication towards long‑term financial security for staff members. Extensive training programmes ensure continuous learning so your career never stagnates; whether it’s developing new skills or deepening existing expertise there’s always room for growth here. The culture is built around collaboration: teams work together sharing knowledge freely so everyone benefits from collective wisdom rather than individual competition. Supportive leadership means managers are invested in helping you succeed—not just meeting targets but achieving personal milestones too. Diversity is celebrated throughout every level of the organisation making it an inclusive workplace where under‑represented voices are heard, valued, and appreciated. If you’re looking for somewhere that combines industry prestige with genuine care for its people this is the place where your talents will flourish.
What’s next:
If you are ready to take your career in global mobility services further apply now—you could be the next trusted advisor making a difference within this leading organisation!
Apply today by clicking on the link provided.
Robert Walters Operations Limited is an employment business and employment agency and welcomes applications from all candidates.
About the job
Contract Type: Permanent
Specialism: Tax
Focus: Tax Operations
Workplace Type: Hybrid
Experience Level: Senior Management
Location: London
Job Reference: TE4269-9EDA8E87
Date posted: 9 March 2026
Consultant: Thomas Geleschun
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