We are looking for an experienced Assistant Controller to join a mission-driven organization in Valhalla, New York. This onsite role supports core accounting operations, financial reporting, compliance activities, and audit readiness while partnering with leadership on budgeting and process improvement. The ideal candidate brings strong technical accounting knowledge, sound judgment, and the ability to balance detailed financial work with cross-functional support.

Responsibilities:

• Oversee participation in monthly, quarterly, and annual closing activities to help ensure accurate and timely financial reporting.
• Prepare and review reconciliations, journal entries, and account analysis for cash, investments, and other balance sheet accounts.
• Administer fixed asset accounting by tracking additions, disposals, and depreciation schedules.
• Contribute to payroll processing, benefits coordination, and related administrative support tied to finance and human resources.
• Assist with budget development, external audit preparation, and supporting documentation for financial statements.
• Complete required tax and regulatory filings, including nonprofit informational returns, charitable registrations, sales tax submissions, and excise tax reporting.
• Monitor grant-related and donor-restricted financial activity, including reconciliations and reporting to support fund accountability.
• Provide guidance to accounting team members, review work for accuracy, and offer backup support across accounts payable and accounts receivable functions.
• Support endowment and annual care accounting, respond to customer inquiries, strengthen internal controls, and prepare special financial analyses as needed.