Group Tax Assistant Manager

Dentsu is an integrated growth and transformation partner to the world’s leading organizations. Founded in 1901 in Tokyo, Japan, and now present in over 145 countries and regions, it has a proven track record of nurturing and developing innovations, combining the talents of its global network of leadership brands to develop impactful and integrated growth solutions for clients. Dentsu delivers end-to-end experience transformation (EX) by integrating its services across Media, CXM and Creative, while its business transformation (BX) mindset pushes the boundaries of transformation and sustainable growth for brands, people and society.

Purpose of the Role

The Group Tax Assistant Manager will work across a range of tax areas within a large multinational group. The role will involve working on international tax matters, including Pillar 2 reporting and group submissions, assisting with year-end group tax reporting, and contributing to tax-related projects that support the wider business. The position requires the ability to identify tax risks and recommend practical solutions based on experience. The successful candidate will be comfortable working with detailed information, is able to operate autonomously, but is capable of recognising when internal or external specialist input is required. The role will report into the Group Tax Manager.

Key Responsibilities

• International Tax Analysis: Undertaking tax analysis in key areas such as Pillar 2, legal entity reorganisation and simplification, profit repatriation strategies, permanent establishment risk, and other international tax matters.
• Pillar 2 Compliance: Supporting the Group Tax Manager with the collection of relevant data and preparing Pillar 2 calculations and submissions for the group, including coordinating with overseas entities on local Pillar 2 filing requirements.
• Withholding Tax Compliance: Assisting with withholding tax compliance matters, including responding to internal queries and supporting analysis of withholding tax obligations.
• Group Tax Reporting Support (Year‑end): Reviewing tax reporting inputs from local markets and supporting country finance teams with tax reporting queries to ensure accuracy and consistency across the group. Working with the wider Group Tax team to ensure year‑end reporting deadlines are met.
• Ad Hoc & Business Support Projects: Contributing to a range of ad hoc tax projects, including providing tax input to the business on client engagements, proposals, and other commercial initiatives.

Person Specification

• Technical Qualifications & Experience: ATT and/or ACA/ACCA qualified, with a proven tax experience and exposure to tax reporting and accounting under IFRS.
• Analytical & Technical Skills: Strong analytical capability with excellent attention to detail, advanced Excel skills, and the ability to manage multiple priorities effectively in a fast‑paced environment.
• Development: Previous Pillar 2 experience is not required, but the role demands a strong appetite to develop new technical skills, embrace challenges, and stay current with evolving tax regulations and trends.
• Commercial Awareness & Stakeholder Management: Commercially astute with a collaborative, pragmatic approach to balancing compliance and business outcomes, supported by strong stakeholder engagement and relationship‑building skills.
• Communication & Influence: Clear, confident communicator with excellent interpersonal, oral, and written skills, able to engage effectively with commercial, functional, leadership, and country teams.
• High‑Performance Mindset & Personal Attributes: Resilient, flexible, and agile in thinking, with a proactive “can‑do” attitude, strong problem‑solving skills, and a commitment to continuous learning while fostering a positive, high‑performing team culture.

What We Offer

This is a permanent role. The team is based in our London office but operates under flexible working arrangements. The team are currently in the office every Tuesday and Thursday. As well as a competitive salary, you’ll enjoy a benefits package that you can tailor to your needs.

Inclusion and Diversity

At Dentsu, we embrace diversity and inclusion, valuing the unique perspectives and contributions of every individual. We believe that diversity fuels creativity and innovation, benefiting our employees, partners, and communities. We welcome applications from all individuals, regardless of race, ethnicity, nationality, religion, gender, gender identity, sexual orientation, age, disability, marital status, or any other protected characteristic. Beyond recruitment, we strive to create an environment where everyone feels respected, supported, and empowered to bring their authentic selves to work. We recognize the importance of work‑life balance and are open to discussing flexible working arrangements for all roles. If you need reasonable adjustments due to a disability or medical condition during our recruitment process, please contact us at accommodations@dentsu.com, quoting the reference number of the role that you are applying for. Your needs will be handled with respect and confidentiality to ensure an inclusive and accessible experience.

Location London Brand Global Functions Time Type Full time Contract Type Permanent