Interim Senior Accountant

East 57th Street Partners; United States; On-site; USD 55,000 - 69,000; Full time

Job summary

East 57th Street Partners seeks an Interim Senior Accountant to execute day-to-day accounting and drive structure in the financial function. You will support month-end close, improve reporting, and assist with system enhancements in a private equity–backed setting.

Ideal candidates have 4+ years of accounting experience, solid GAAP knowledge, and ERP systems proficiency (NetSuite, SAP, QuickBooks), with advanced Excel skills. This is a 3–6+ month engagement with potential extension.

Qualifications

• Bachelor’s degree in Accounting or Finance required.
• 4+ years of accounting experience, month-end close a focus.
• Private equity-backed or high-growth experience preferred.
• Solid GAAP knowledge and control environment awareness.
• Hands-on ERP experience with NetSuite, SAP or similar.
• Proficient Advanced Excel skills (pivot tables, lookups).

Responsibilities

• Perform full-cycle accounting including journal entries and reconciliations.
• Support AR/AP, accruals, and fixed assets; ensure data accuracy.
• Help build a structured month-end close process and timelines.
• Assist with ERP/system enhancements and data cleanup.
• Prepare monthly financial statements and variance analysis.
• Support audit readiness and internal controls documentation.

Skills

GAAP basics

ERP systems

Advanced Excel

Education

Bachelor’s degree in Accounting or Finance

Tools

NetSuite

SAP

QuickBooks

Job description

Compensation: $40–$50 per hour (based on experience)

Duration: 3–6+ months (with potential for extension)

Overview

E57 Partners is engaged on behalf of our client, a private equity-backed portfolio company, to identify a highly hands‑on, detail‑oriented Interim Senior Accountant.

This role is built for someone who is comfortable operating in the weeds — executing day‑to‑day accounting while helping bring structure, discipline, and accuracy to the financial function. The Interim Senior Accountant will play a critical role in supporting and building the month‑end close process, improving reporting, and assisting with ongoing system and process enhancements.

Key Responsibilities

Day‑to‑Day Accounting Execution

• Perform full-cycle accounting activities including journal entries, account reconciliations, and general ledger maintenance
• Support AR/AP, accruals, and fixed asset accounting as needed
• Ensure accuracy and completeness of financial data across all transactions

Month‑End Close Support & Buildout

• Assist in building and executing a structured month‑end close process
• Prepare and post journal entries, complete reconciliations, and support close timelines
• Help document workflows and create repeatable close procedures

System Transformation & Process Improvement

• Support ERP/system implementation, upgrades, or optimizations
• Assist in cleaning up data and improving system integrity
• Identify inefficiencies and contribute to process improvements across the accounting function
• Assist in the preparation of monthly financial statements and reporting packages
• Support variance analysis and provide insight into financial performance
• Ensure reporting is accurate, timely, and aligned with leadership expectations

Audit & Compliance Support

• Assist with audit readiness, including reconciliations and documentation
• Support internal controls and adherence to accounting policies
• Coordinate with external auditors and advisors as needed

Qualifications

• Bachelor’s degree in Accounting or Finance
• 4+ years of accounting experience, with strong exposure to month‑end close
• Experience in private equity‑backed or high‑growth environments preferred
• Strong understanding of GAAP fundamentals
• Hands‑on experience with ERP systems (NetSuite, SAP, QuickBooks, or similar)
• Advanced Excel skills (pivot tables, lookups, data analysis)

What We’re Looking For

• A detail‑oriented, roll‑up‑your‑sleeves professional who enjoys working in the weeds
• Someone who thrives in fast‑paced, evolving environments
• A proactive team member who takes ownership of their work and drives tasks to completion
• Strong communicator who can work effectively across teams

Why This Role

This is an opportunity to step into a high-impact role within a private equity‑backed environment and contribute immediately. You will play a key role in strengthening the accounting foundation, improving processes, and supporting leadership with accurate and timely financial information.