Our client, a growing accountancy firm in London would like to Mixed Tax Assistant Manager. This is a fantastic opportunity for an experienced professional to take ownership of a varied client portfolio, deliver high-quality advisory work, and mentor junior staff within a supportive, forward-thinking environment.Working closely with the leadership team at the firm, you will handle a blend of personal and corporate tax matters, predominantly focusing on owner-managed businesses (OMBs), SMEs, and high-net-worth individuals (HNWIs).Responsibilities will include:- Portfolio Management: Act as the primary point of contact for a portfolio of mixed tax clients, ensuring compliance and offering proactive tax planning.- Compliance: Prepare / review complex personal tax returns, corporation tax computations, P11Ds, and ATED returns prepared by seniors and trainees.- Technical Research: Conduct in-depth research on technical issues, prepare tax advice reports, and handle HMRC enquiries.- Mentorship: Supervise and review the work of junior advisers, assisting with their training and professional development.- Client Development: Identify opportunities to enhance tax service delivery and support the team with business development.- Advisory Projects: Deliver complex mixed tax advisory projects including corporate restructuring, profit extraction, IHT planning, property transactions, and SEIS/EIS.This is a unique opportunity to join a friendly and supportive firm which offers staff excelle