About The Position

ERRG is seeking an Accounting Assistant/Billing and Accounts Receivable Specialist to manage the billing function from contract award through project closeout. This in-office role is based in ERRG’s Martinez, California office, reports to the CFO, and works closely with the senior billing specialist and project managers. The position also supports general accounting work as time allows. Employment is contingent on successful completion of a background check and drug screening.

Requirements

  • Bachelor’s degree in accounting or finance, or equivalent relevant experience.
  • At least 3 years of experience in contract-based invoicing and accounts receivable.
  • Proficiency in Microsoft Office, including Excel XLOOKUP and pivot tables.
  • Hands-on experience with a large ERP system.
  • Experience supporting month-end close and financial audits.
  • Exceptional attention to detail and ability to maintain accuracy while managing multiple deadlines.
  • Strong organizational, analytical, communication, and problem-solving skills, including the ability to read and interpret contracts for accounting and invoicing implications.

Nice To Haves

  • Project accounting experience.
  • Experience with an Oracle-based ERP.

Responsibilities

  • Prepare client invoices promptly in accordance with lump-sum, fixed-fee, and time-and-materials contracts, working closely with project managers.
  • Ensure invoice packages are accurate and include all necessary supporting documentation.
  • Set up and maintain projects in JD Edwards using contracts for key billing and invoicing details.
  • Research billing discrepancies, process adjustments, and resolve invoicing issues.
  • Record and apply client payments received by check, ACH, or wire transfer.
  • Work with project managers to follow up on overdue invoices.
  • Prepare and report gross receipts taxes for multiple jurisdictions monthly, and research requirements when entering new jurisdictions.
  • Follow internal controls and approval procedures, support audit requests, and recommend improvements to billing and collection workflows.
  • Perform other billing, invoicing, and accounts receivable duties as required.
  • Support general accounting tasks as time allows.

Benefits

  • Competitive compensation
  • Hands-on training
  • Educational assistance
  • Opportunities for career growth and advancement
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