Senior Staff Accountant — Remote, Equity & PTO

Ion Storage Systems; Beltsville (MD); Remote; USD 90,000 - 109,000; Full time

Benefits offered by this job

Medical Insurance

Stock options

Floating holidays

17 days of PTO to start

401(k) with 4% match

Wellness allowance $1000

Job summary

Ion Storage Systems is seeking a Senior Staff Accountant in Beltsville, MD to own day-to-day close activities including reconciliations, schedules, AP/AR, payroll and labor data preparation. The role emphasizes strong accuracy, process improvements, and cross-team collaboration in a fast-paced environment.

The successful candidate will manage recurring close deliverables from prep through review, maintain supporting documentation for audits, and work closely with supervision and other

Qualifications

• 3–5 years of progressive accounting experience, including general ledger, month-end close, and account reconciliations.
• Bachelor's degree in accounting or a related field.
• Working knowledge of GAAP and hands-on experience with an ERP or accounting system
• Advanced Excel skills, including lookup functions and pivot tables.
• Strong attention to detail and the ability to deliver accurate work with minimal rework.
• Ability to communicate clearly and effectively with colleagues across departments.

Responsibilities

• Prepare bank and credit card reconciliations and follow up on supporting receipts.
• Maintain the fixed asset schedule and record depreciation
• Maintain the prepaid schedule and record recurring entries.
• Reconcile accrued liabilities and deferred grant balances.
• Prepare debt interest and amortization schedules for manager review.
• Prepare reimbursement reports and the related journal entries.
• Record vendor bills from the AP inbox
• Prepare AP payment runs for approval, reconcile vendor statements, prepare AP aging, and gather year-end 1099 information.
• Record customer invoices, prepare the AR reconciliation, follow up with supply chain on shipping support, and monitor the AR inbox for customer inquiries.
• Pull timekeeping reports, prepare the PTO worksheet and payroll journal entries, and prepare labor distribution data and hourly cost files, including following up on outstanding hours and approvals.
• Gather and organize support for external audit and government compliance requests.
• Verify vendor bank detail changes, update vendor records, maintain vendor change log for manager review
• Follow internal controls, including segregation of duties over vendor setup, bank changes, and payment release.
• Document procedures, support ERP system implementation work such as testing and data validation, and help improve processes.
• Answer accounting questions from other departments.

Skills

GAAP knowledge

Advanced Excel

Attention to detail

Clear communication

ERP/Accounting system experience

Education

Bachelor's degree in accounting

Tools

ERP system

NetSuite (preferred)

Job description

Ion Storage Systems is seeking a Senior Staff Accountant in Beltsville, MD to own day-to-day close activities including reconciliations, schedules, AP/AR, payroll and labor data preparation. The role emphasizes strong accuracy, process improvements, and cross-team collaboration in a fast-paced environment.

The successful candidate will manage recurring close deliverables from prep through review, maintain supporting documentation for audits, and work closely with supervision and other