Tax Advisory - Senior Manager

Position Summary We are seeking an experienced and client-focused Senior Manager to join our Tax Advisory Services group. In this role, you will lead the delivery of complex tax engagements for high-net-worth individuals and entrepreneurial businesses, ensuring technical accuracy, timeliness, and a personalized client experience. You will manage and mentor a team of professionals, contribute to strategic initiatives, and collaborate with leadership on client development, operational planning, and process improvement. This position requires strong tax expertise, leadership capabilities, and a commitment to excellence and firm values. This role is ideally based in Wilmington, DE or Philadelphia, PA where the firm is building a strong, connected presence and successful candidates should be willing to be in office 4 days per week. We are also open to flexible New York Metro-based candidates that are willing to be on-site in our Philadelphia or Wilmington office 1-2 days per week. Supervisory Responsibility This position supervises other Managers, Associate Managers, Senior Associates and Associates of the Tax Advisory Services team. Essential Functions & Key Responsibilities Support the strategic direction of the Tax Advisory Services team and lead its execution in collaboration with senior leadership Serve as a key advisor to high-net-worth individuals, entrepreneurs, and family offices, delivering tailored tax planning, compliance, and advisory services Manage daily client engagements, ensuring accuracy, timeliness, and exceptional service Lead and mentor a team of tax professionals, fostering a culture of excellence, accountability, and continuous learning, while supporting the development of future leaders Deliver comprehensive tax strategies that align with client objectives, ensuring compliance and identifying opportunities for optimization Monitor engagement performance, including realization, utilization, and profitability, and take proactive steps to improve efficiency and value delivery Collaborate with Directors and firm leadership on billing, client onboarding, and engagement planning Partner with Operations & Finance to support budgeting, forecasting, and resource planning for your book of business Supervise and coach Managers, Seniors, and Associates, providing regular feedback, technical guidance, and career development support Champion a culture of accountability, collaboration, and continuous development across the tax team Develop high-potential talent and prepare them for future leadership roles Ensure engagement compliance with firm policies, risk protocols, and quality standards Use technology and analytics to streamline tax workflows, enhance insights, and boost efficiency Required Qualifications Bachelor’s degree in Accounting, Finance, or a related field CPA or EA designation 8–12 years of progressive tax experience, including significant exposure to high-net-worth individuals, closely held businesses, and multi-entity structures Strong technical knowledge of federal, state, and local tax laws, with hands‑on experience in S corporations, partnerships, and trust taxation Proven ability to manage client relationships, lead teams, and deliver high-quality work under tight deadlines Excellent communication and interpersonal skills, both written and verbal, with the ability to explain complex tax concepts clearly and concisely Exhibits strong leadership and mentoring skills with a focus on team growth and collaboration Willingness to work an average of 48–50 hours per week Strong analytical and problem‑solving skills Ability to thrive in a fast‑paced, high‑demand, growth‑oriented environment with a high energy level Strong values aligned with our Culture (Fairness, Honesty, Trustworthy, Respectful, Flexible, Strong Work Ethic) Team player with a strong desire to be an active, long‑term participant in the overall growth of the Firm Entrepreneurial spirit and commitment to Firm’s vision Strong intangibles aligning with High Performance Model Must be commutable to either the Philadelphia, PA or Wilmington, DE office locations for events and meetings Ability and willingness to work in a Siegfried office as required for an average of four days per week in accordance with Siegfried's policy If based outside of Philadelphia, PA or Wilmington, DE, successful candidates should be willing to be in-office 4 days per week including traveling to the Philadelphia or Wilmington office 1–2 days per week Desired Qualifications Master’s degree in Taxation, JD or a related advanced credential Prior experience at a Big 4 or leading regional accounting/advisory firm Proficiency in preparing and reviewing S Corporation and trust tax returns Familiarity with sales and use tax compliance and advisory matters Demonstrated ability to develop tax positions and provide strategic guidance to clients on complex tax issues Experience advising on business transactions, including mergers, acquisitions, and entity restructuring Working knowledge of CCH Axcess and CCH Engagement platforms or similar tax compliance/workflow systems FLSA/At-Will Employment This position is an exempt position under FLSA. This position is and will remain at-will in nature. #J-18808-Ljbffr Siegfried Advisory