Tax Investigations Manager

Company: Simmons Gainsford, part of the Sumer Group

Location: London

Posted: April 22nd, 2026

At Simmons Gainsford, we are a forward-thinking accountancy firm, renowned for delivering high-quality tax, consulting, and audit services to privately owned companies and high-net-worth individuals. We partner with a diverse range of clients, helping them navigate complex financial management and compliance challenges. With a client‑centric approach, we provide tailored solutions to meet their unique needs, building long‑term relationships based on trust and expertise.

Department

Personal Tax

Location

London

Description

We are seeking an experienced Tax Investigations Manager to assist with developing our Tax Investigations offering. This is an exciting opportunity for an experienced tax investigations specialist to take ownership of an established area of work, manage a varied portfolio of cases, and play a key role in growing the service line within the firm.

This role will initially involve taking responsibility for all existing investigations and dispute resolution matters, acting as the primary point of contact for clients and HMRC. Over time, you will work closely with Partners to develop and expand the firm’s investigations offering, identifying opportunities across the wider client base and building a specialist team as the practice grows.

The successful candidate will combine strong technical expertise with commercial awareness and the ability to build trusted relationships with clients and colleagues.

Key Responsibilities

Skills, Knowledge & Expertise

Belong @ Sumer

At Sumer, we know everyone’s journey is different. That’s why we’re committed to fairness, removing barriers, and giving people the support they need to do their best work. If you need any support during the hiring process, just let us know.

Our values represent what matters most to us and guide how we work every day:

We know diverse teams make us stronger. That’s why we’re creating an inclusive workplace where everyone belongs and differences are valued and celebrated.

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