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.

This position supervises other Managers, Associate Managers, Senior Associates and Associates of the Tax Advisory Services team.

• 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

• 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…