Accounting Internship - Accounts Payable (Summer 2027)

OneEnergy Inc; Madison (WI); On-site; USD 30,000 - 39,000; Full time

Job summary

OneEnergy Renewables is seeking an Accounting Intern for Accounts Payable for Summer 2027. You'll support the Accounting & Finance team by processing vendor invoices, maintaining vendor records, and assisting with employee expense programs for development, construction, and operating projects.

You'll gain hands-on experience across the full AP lifecycle and exposure to renewable energy project accounting.

Qualifications

• Currently enrolled in an associate or bachelor’s degree program in Accounting or Finance.
• Strong attention to detail with accuracy on large data sets.
• Excellent organizational and time-management skills.
• Strong verbal and written communication with stakeholders.
• Proficiency with Microsoft Excel and Outlook; able to learn new software.
• Ability to handle confidential financial information with integrity.
• Interest in sustainability or renewable energy preferred but not required.

Responsibilities

• Review and process vendor invoices.
• Validate documentation, coding, approvals, and records.
• Assist with purchase requisitions and PO administration.
• Support weekly payment runs and prepare payment docs.
• Respond to inquiries regarding invoices, vendors, and payment status.
• Assist vendor onboarding including W-9s and banking data.
• Maintain vendor records and master data in systems.
• Support employee expense and corporate card administration.
• Monitor invoicing workflows and follow up with project managers.
• Assist with account reconciliations and month-end close.
• Participate in process improvements for efficiency and controls.
• Support annual reporting and audit requests.
• Learn renewable energy project cost structures and project accounting concepts.

Skills

Attention to detail

Organizational and time-management

Communication skills

Analytical problem-solving

Willingness to learn new software

Education

Accounting or Finance degree pursuit

Tools

Microsoft Excel

Microsoft Outlook

Microsoft 365

Job description

Accounting Internship - Accounts Payable (Summer 2027)

About this position

About OneEnergy Renewables

OneEnergy’s mission is to make clean energy the #1 source of electricity for consumers and utilities. We develop solar energy and battery energy storage (BESS) projects across the United States in community solar, distributed generation, and large utility scale project segments.Our diverse project pipeline, multiple locations across the US, and unique multidisciplined team sets us apart.

We are a dynamic and innovative renewable energy industry company committed to excellence, collaboration, and driving positive change in our industry.

About the role

OneEnergyis seeking anAccounts PayableIntern for the summer of 2027.This position willsupport the Accounting & Finance team in processing vendor invoices,maintainingvendor records,andassistingwith employee expense programs for development, construction, and operating projects. This role provides hands‑on experience in the full accounts payable lifecycle while exposing the intern to renewable energy project development, corporate operations, financial controls, and month‑end accounting processes. The intern will collaborate with cross‑functional teams to help ensureaccurate,timely, and compliant financial transactions acrossOneEnergy'sgrowing solar portfolio.

What you'll do

• Review and process vendor invoices.
• Validate invoice documentation, coding, approvals, and supporting records prior to entry into the accounting system.
• Assist with purchase requisition review and purchase order administration.
• Support weekly payment runs by preparing payment documentation and reviewing supporting materials.
• Respond to internal and external inquiries regarding invoices, vendors, payment status, and accounts payable processes.
• Assist with vendor onboarding, including collection and review of W-9s, banking information, and required vendor documentation.
• Support maintenance of vendor records and master data within company systems.
• Assist with employee expense and corporate card administration, including transaction reviews and policy compliance checks.
• Monitor invoicing and approval workflows and follow up with project managers, spend owners, and business stakeholders as needed.
• Help prepare account reconciliations and support month‑end close activities.
• Assist with filing, auditing, and organization of accounts payable documentation and records.
• Participate in process improvement initiatives focused on efficiency, automation, and internal controls.
• Support annual reporting, audit requests, and special accounting projects as assigned.
• Gain familiarity with renewable energy project cost structures, construction payment processes, lease payments, and project accounting concepts.
• Perform other accounting and finance‑related duties as assigned.

What you'll bring

Qualifications:

• Currently enrolled in an associate or bachelor’s degree program in Accounting or Finance.
• Interest in an Accounting or Finance career path.
• Strong attention to detail with the ability to maintain accuracy while handling large volumes of information.
• Effective organizational and time‑management skills with the ability to manage multiple priorities and deadlines.
• Strong verbal and written communication skills and the ability to work professionally with internal and external stakeholders.
• Demonstrated analytical and problem‑solving abilities.
• Proficiency in Microsoft Excel, Outlook, and other Microsoft 365 applications.
• Comfortable learning new software systems and business processes.
• Ability to handle confidential financial information with professionalism and integrity.
• Self‑motivated, curious, and eager to learn in a collaborative team environment.
• Ability to work independently while contributing to a fast‑paced, cross‑functional organization.
• Prior internship, accounting coursework, bookkeeping experience, or exposure to ERP/accounting systems is a plus but not required.
• Interest in sustainability, renewable energy, or infrastructure development is preferred.

Dates and Deadlines:

• The 12‑week internship will run from Tuesday, June 1st - Friday, August 20th. Start and ends dates can be flexed based on school schedule.
• Applications are due on Monday, October 12th.

Compensation:

OneEnergy’s compensation packages are dependent on an array of factors including, but not limited toskill sets, experience and training, licensure and certifications, geographic location, and otherorganizational needs. Interns will be paid an hourly rate of $25/hour.

We recognize an equitable energy transition requires the participation of diverse communities, groups,and institutions. OneEnergy is an equal opportunity employer and does not discriminate againstotherwise qualified applicants on the basis of actual or perceived race, color, creed, religion, ancestry,citizenship status, age, sex, marital status, sexual orientation, national origin, disability or handicap,veteran status, or any other characteristic protected by applicable federal, state, or local laws.