Development Accounts Payable Specialist

About Middle River Power

Middle River Power (MRP) is a private equity-sponsored platform specializing in the investment and asset management of U.S. power generation facilities. With over 8GW of natural gas, coal, battery storage, and solar facilities across multiple states, the company focuses on safe, reliable, and efficient power plant operations. MRP’s executive team collectively brings over 120 years of expertise in energy management and power generation, collaborating closely with plant personnel and industry professionals. MRP applies a data-driven approach to investment and operational decisions, considering key factors such as regulatory changes and resource planning. Learn more at middleriverpower.com.

At MRP, we believe that experienced leadership, capable emerging talent, and strong partnerships enable us to deliver innovative, outsized solutions in the energy sector. This framework ensures every hire strengthens our culture of curiosity, collaboration, and commitment while maintaining the speed and flexibility our business demands.

The Behaviors We Hire For

Our business thrives on a set of behaviors that allow our team-based culture to reach high standards and build on one another’s strengths. MRP is a PE-backed environment that requires operating at pace, calculated risk-taking, and creative problem-solving. The people we hire must excel not only in their technical domain but also embody the behaviors that make us successful.

· Love What You Do - Genuine curiosity for the energy sector and our business

· Collaborate to Win - Works across teams; believes partnership delivers results

· Comfort with Ambiguity - Adapts to growth and change; solves problems resourcefully

· Innovation Over Status Quo - Brings fresh thinking and challenges assumptions

· Confident & Honest - Owns their contribution; transparent about what they don't know

· Progressive Problem Solver - Guides problems to solutions; works hard to get it done

· Here for the Long Term - Committed to building a career and business with others

Position Summary

The Development Accounts Payable Specialist is responsible for ensuring the accurate and timely processing of vendor invoices, payment transactions, and financial records supporting plant operations and development projects. This role serves as a key liaison between vendors, contractors, operations, and accounting teams to maintain strong financial controls, support project cost tracking, and ensure compliance with company policies and contractual obligations.

The Development Accounts Payable Specialist reports to the Director of Accounting and is based in Spokane, Washington.

Key Responsibilities

· Manage the full-cycle accounts payable process, ensuring accurate and timely vendor payments while maintaining compliance with company policies and internal controls.

· Review, code, and process vendor invoices using appropriate general ledger accounts, cost centers, and project allocations.

· Match invoices to purchase orders, receiving documentation, and contract terms to ensure accuracy and proper authorization.

·  Apply appropriate sales and use tax treatment and ensure compliance with applicable tax requirements.

· Enter invoices into the accounting system, route for approval, and proactively follow up on outstanding approvals to meet payment deadlines.

· Serve as the primary point of contact for vendor inquiries, resolving payment discrepancies and maintaining positive vendor relationships.

· Maintain accurate vendor records, including W-9s, insurance certificates, contracts, and supporting documentation.

· Support accounting activities related to plant development, construction, expansion, and capital improvement projects, including project cost tracking and reporting.

· Assist with monthly close activities, including preparation of accounts payable accruals and supporting schedules.

· Analyze and prepare reports related to operating and maintenance (O&M) expenses, identifying budget-to-actual variances and cost trends.

· Support budgeting, forecasting, and financial reporting processes by providing accurate accounts payable and project expenditure data.

· Assist with annual audits by preparing requested documentation and responding to auditor inquiries.

· Coordinate year-end 1099 reporting and other regulatory reporting requirements related to accounts payable.

· Continuously identify opportunities to improve accounts payable processes, documentation, and internal controls.

· Perform other accounting, administrative, and special project responsibilities as assigned.

Qualifications

· Associate's degree in Accounting, Finance, Business Administration, or a related field preferred.

·2-4 years of accounts payable, accounting, or financial operations experience.

· Experience supporting construction, energy, industrial, manufacturing, or project-based environments preferred.

· Strong attention to detail with the ability to manage multiple priorities and deadlines.

· Proficiency in Microsoft Excel and accounting/ERP systems.

· Excellent organizational, communication, and problem-solving skills.

· Ability to work independently while collaborating effectively across accounting, operations, and project teams.

Overview of our Hiring Process

We take a progressive approach to our interview process, which means we move quickly and prioritize early conversations with the people you would work with day to day. Final round interviews are usually held onsite and include members of our leadership team. In some situations, we will ask candidates to complete a project or build a presentation when it is relevant to the job. We are committed to moving efficiently and valuing your time throughout the interview process.

Work Location :

To foster a collaborative culture, we aim to place roles within one of our office locations. In some cases, we may create remote roles when it makes sense for business. Frequency and location of travel for team meetings and job duties will vary by role. MRP is an in-office 4 days a week organization.

Compensation

MRP builds its compensation packages to reward and recognize high-performing talent. Base salary ranges are designed to be competitive by market and take into consideration individual experience, technical skills and long-term career growth. Each employee is also eligible for an annual discretionary bonus based on their level and company annual performance metrics.

Benefits and Perks

MRP offers a holistic and comprehensive benefits package for all employees that consists of the following:

• Medical, vision, dental coverage for employees and families is 90% employer-funded
• FSA and HSA plans with company HSA contributions
• 15 days of PTO, company holidays, and two floating holidays
• Employee EAP and wellness services
• Parental Leave
• 401k with company matching up to 4%