Billing Specialist / Customer Service

About INNIO Group:

INNIO Group is a global distributed energy solutions provider that delivers reliable, flexible, transient, decentralized, modular and efficient power. With a track record of innovation, INNIO designs, manufactures and services high‑performance power systems under its Jenbacher and Waukesha brands. The company delivers power for applications including data centers, microgrids, grid stabilization, industrial energy and gas compression.  

INNIO operates a global installed base across approximately 100 countries as of December 31, 2025, supported by a resilient, high‑margin services business that delivers long‑term, recurring revenues across the full equipment lifecycle. As electricity demand accelerates—driven by AI, electrification and grid constraints—INNIO enables scalable, behind‑the‑meter power generation with high efficiency, fast start capability, strong transient performance and fuel flexibility, including hydrogen‑ready solutions. INNIO employs over 5,000 people worldwide and is committed to moving energy forward. 

Position Overview:

The Billing Specialist / Customer Service role supports the North America Service Department with a primary focus on billing administration, invoice processing, and customer service support activities. This position is responsible for reviewing service documentation, validating billing information, coordinating purchase order processes, and ensuring the accurate and timely generation of invoices for planned and unplanned service activities.

This is an onsite daily position in Houston, TX. 

Responsibilities:

• Generate, review, and process invoices for planned and unplanned service activities, ensuring accuracy and compliance with company policies and customer requirements
• Review purchase orders, quotations, service reports, labor hours, travel hours, expenses, bills of sale, and supporting documentation to ensure billing accuracy
• Verify that customer purchase orders, approved quotations, and invoiced amounts align prior to invoice submission
• Collaborate with billing teams to support invoicing processes and maintain data accuracy within Oracle and related systems
• Partner with customer service managers, service managers, and work preparation teams to obtain required documentation and resolve billing discrepancies
• Investigate and resolve invoice, purchase order, and service documentation discrepancies to support customer satisfaction and timely payment
• Administer the full lifecycle of internal and external purchase orders, including review, tracking, and record maintenance
• Maintain accurate customer records, billing information, account details, and supporting documentation
• Track contractual billing milestones and invoicing requirements to ensure billing activities occur in accordance with customer contracts and agreements
• Evaluate billing data and reports to identify trends, discrepancies, and opportunities for process improvements
• Maintain comprehensive records of customer interactions, billing activities, and resolution actions to support audit and compliance requirements
• Coordinate with regional teams to ensure invoice alignment and timely submission for payment processing
• Support customer inquiries and service-related administrative activities
• Organize department meetings, customer visits, training events, team functions, and related logistics, including hotel accommodations, catering, and event coordination
• Assist with maintaining service databases, departmental records, and process documentation.
• Support additional administrative and office functions as assigned

Requirements:

• Bachelor's degree in Accounting, Finance, Business Administration, Operations, or a related field
• Minimum of two (2) years of experience in billing, invoicing, customer service support, sales support, operations support, accounts receivable, or a related business function
• Experience reviewing purchase orders, quotations, invoices, contracts, or other financial and service-related documentation
• Experience supporting service, industrial, manufacturing, energy, equipment, or other technical business environments preferred
• Experienced with using Oracle desired
• Proficiency in Microsoft Office: Word, Excel, PowerPoint, & Outlook
• Must be legally authorized to work in the United States without current or future sponsorship

Knowledge, Skills & Abilities:

• Strong understanding of billing, invoicing, purchase order administration, and customer support processes
• Knowledge of basic accounting principles, financial documentation, and contractual billing requirements
• Exceptional attention to detail with the ability to identify and resolve discrepancies
• Strong analytical and problem-solving skills with the ability to investigate complex billing issues
• Excellent organizational, time management, and prioritization skills
• Ability to manage multiple assignments and meet critical deadlines in a dynamic environment
• Strong verbal and written communication skills with the ability to collaborate across multiple departments
• Ability to build effective working relationships with customers, billing teams, service personnel, and cross-functional stakeholders
• Self-motivated and proactive with a willingness to ask questions, seek clarification, and drive issues to resolution
• Ability to maintain confidentiality and handle sensitive customer and financial information appropriately
• Proactive mindset with the ability to identify gaps, support problem-solving efforts, and contribute to process improvements
• Ability to work in an office-based environment at a computer for extended periods
• Occasional walking, standing, and movement during work shift