Billing Specialist I (Remote - US)

Interested in joining a growing company where you will work with talented colleagues, enhance a supportive and energetic culture, and be part of the climate solution? At Energy Solutions, we focus on the big impacts. And we believe that market-based programs can be a powerful force to deliver large-scale energy, carbon, and water-use savings. Since 1995, we’ve harnessed that power to offer proven, performance-based solutions for our utility, government, and institutional customers.

Are you a numbers-minded problem solver who loves keeping details organized and making sure everything adds up? We’re looking for a Billing Specialist I to join our Finance team and help keep client billing, revenue, and financial reporting accurate and on track.

In this role, you’ll prepare client invoices, process revenue entries, reconcile billing and revenue data, investigate discrepancies, and maintain accurate financial records. You’ll partner with project managers and Finance teammates to gather billing information, meet deadlines, and ensure invoices and supporting documentation are complete and accurate. You’ll also contribute to month-end and year-end closing, financial reporting, audit support, and ongoing improvements to billing processes.

We’re looking for someone who enjoys working with numbers, digging into details, and solving routine financial puzzles. You’ll thrive here if you’re organized, analytical, comfortable managing competing deadlines, and confident collaborating across teams while knowing when to escalate an issue. If you’re ready to put your attention to detail and financial skills to work in a collaborative environment, we’d love to hear from you.

Daily responsibilities include but are not limited to:

Execute recurring client billing and revenue-entry activities in the organization’s ERP or accounting system in accordance with established procedures, contract instructions, and project requirements.

Prepare client invoices, invoice breakdowns, cover letters, expense documentation, supporting reports, and related billing schedules.

Apply established billing requirements to time-and-materials, fixed-fee, milestone-based, Pay-for-Performance, and other assigned invoicing arrangements.

Analyze invoice and revenue data to identify routine variances, missing information, inconsistencies, or potential errors.

Prepare detailed revenue reconciliation worksheets comparing revenue recorded in the accounting system with invoices submitted to clients.

Research routine billing discrepancies and document findings, corrections, and outstanding items for review.

Prepare billing status updates and submit approved invoices in accordance with client submission requirements and established procedures.

Prepare routine and ad hoc financial reports to support project reporting, billing analysis, and Finance team needs.

Assist with journal entry preparation by gathering documentation, preparing supporting schedules, and routing entries for review and approval.

Execute assigned month-end and year-end billing activities, including preparation of reports, reconciliation schedules, and supporting documentation.

Update invoice records, notes, submission dates, revenue entries, and billing statuses in accounting systems, trackers, and designated repositories.

Escalate unclear contract terms, rate discrepancies, incomplete approvals, system issues, or other non-routine billing concerns to senior billing staff.

Prepare and update Billing revenue variance trackers, invoice breakdowns, and supporting analytical schedules.

Report unresolved variances or discrepancies that may affect billing accuracy, project budgets, revenue recognition, or financial close timelines.

Prepare invoice, revenue, reconciliation, and subcontractor documentation requested for internal or external audits.

Adhere to established accounting controls, billing procedures, documentation standards, and confidentiality requirements.

Minimum Qualifications:

A bachelor’s degree.

A minimum of 2 years of experience in billing, accounting, accounts receivable, financial administration, or a related area.

Working experience preparing invoices, posting revenue, or processing financial transactions in an accounting or ERP system.

Working experience preparing reconciliations, supporting schedules, variance trackers, or financial reports.

Foundational experience supporting project-based or comparable client billing.

Working experience communicating with project managers or internal stakeholders to gather billing information, clarify discrepancies, and meet financial deadlines.

Foundational experience supporting month-end close, journal entries, reconciliations, or audit-documentation requests.

Working knowledge of billing, invoicing, revenue posting, accounts receivable, and general accounting procedures.

Competent Excel proficiency, including formulas, lookups, sorting and filtering, data validation, reconciliation worksheets, and financial trackers.

Working proficiency with Microsoft Word, Outlook, SharePoint, and related Microsoft 365 applications.

Working knowledge of accounting or ERP systems and the ability to enter, update, analyze, and maintain financial information accurately.

Foundational knowledge of revenue reconciliation, variance analysis, journal entries, and month-end accounting activities.

Strong analytical and critical-thinking skills, with the ability to identify discrepancies, research routine issues, and document findings.

Strong attention to detail and quality control when preparing invoices, reconciliations, and supporting documentation.

Strong written and verbal communication skills, including the ability to explain routine billing requirements and follow up on missing information.

Ability to execute assigned work independently, manage competing deadlines, and escalate issues that fall outside established guidance.

Ability to work effectively both independently and within a Finance or cross-functional project team.

Ability to maintain confidentiality and appropriately handle client, project, employee, and financial information.

Working experience with project-based billing or professional-services accounting.

Working experience preparing revenue reconciliations, invoice breakdowns, budget analyses, or variance reports.

Foundational to working experience reconciling invoice variances.

Foundational experience preparing journal-entry support, assisting with audits, or supporting month-end and year-end close.

Working experience generating ad hoc financial or project reports for Finance, project managers, or business stakeholders.

Experience in a consulting, government contracting, utility, energy, or incentive-program environment.

Working knowledge of Workday, QuickBooks, or another project-based ERP or accounting system.

Working knowledge of project billing methods.

Competent Excel skills, including pivot tables, XLOOKUP/VLOOKUP, SUMIFS, reconciliation methods, and analysis of moderately sized datasets.

Foundational knowledge of generally accepted accounting principles as they relate to billing, revenue, accounts receivable, and financial documentation.

Familiarity with client accounts payable portals, electronic invoice-submission systems, SharePoint, OneNote, and PDF-management tools.

Working knowledge of financial record retention, audit support, documentation controls, and reconciliation practices.

Ability to prepare clear financial summaries and communicate routine analytical findings to non-accounting stakeholders.

Willingness to travel once per year for the Finance team offsite event.

The hourly range for this role is $30.50 - $37.20, with a target compensation of $30.50 - $34.00 based on experience and qualifications.

Compensation is commensurate with experience and includes a generous retirement package. Energy Solutions provides an excellent