Invoicing Manager

Harbor IT is a leading Managed Service Provider (MSP) specializing in delivering cutting-edge Cybersecurity, IT, and Cloud Services to a diverse portfolio of clients. We pride ourselves on our commitment to excellence, innovation, and customer satisfaction. Harbor IT is backed by investment firm Worklyn Partners since 2022 and has built a national platform through acquisition and rapid organic growth. Our mission is to manage our clients’ technology and mitigate their cyber risks, so that they don’t have to.

About the role

The Invoicing Manager is responsible for the accuracy, timeliness, and integrity of all customer billing processes across the organization. In a $100M+ revenue MSP environment with recurring and project-based services, this role ensures that all customer invoicing reflects contractual terms, revenue schedules, and operational realities. The Invoicing Manager partners closely with Finance, Sales Operations, and Service Delivery to ensure billing precision, compliance, and customer satisfaction — while supporting efficient cash collection and reliable financial reporting. This is a leadership role focused on process excellence, automation, and scalability in a fast-growing managed services environment.

Responsibilities

• Oversee the full billing cycle for recurring, project-based, and hardware-as-a-service revenue streams. Ensure invoices are accurate, compliant with contract terms, and issued within defined SLAs.
• Partner with Sales Ops and Service Delivery to validate billable milestones, contract renewals, and change orders.
• Maintain master data integrity for billing schedules, rates, and customer information.
• Review and approve complex or high-value invoices.
• Establish, document, and continuously improve standard operating procedures for invoicing. Ensure consistency across billing systems (e.g., NetSuite, ConnectWise, VersaPay, etc.).
• Collaborate with the Controller and Finance team to ensure alignment with GAAP revenue recognition policies (ASC 606).
• Support external and internal audits by providing invoice documentation and reconciliations.
• Manage month-end billing cutoffs to align with financial close timelines.
• Drive automation and efficiency in the invoicing process through better use of ERP and billing tools.
• Identify and implement improvements in billing workflow, approvals, and recurring revenue setup.
• Collaborate with IT and Finance Systems teams to improve data flow between PSA, CRM, and ERP platforms.
• Support system upgrades, testing, and implementation of new billing functionalities.
• Partner with Sales Operations to ensure contracts and orders are set up correctly at inception.
• Work with Service Delivery and Project Management to track completion milestones and billing triggers.
• Collaborate with Accounts Receivable to support timely collections and resolve customer billing disputes.
• Coordinate with Finance to align invoicing data with financial forecasts and reporting.
• Lead and develop a team of billing specialists or coordinators. Set clear expectations for accuracy, timeliness, and accountability.
• Foster a customer-first culture while maintaining operational discipline.
• Provide training and development to improve team capabilities and process understanding.

Requirements

• 5+ years of experience in Invoicing in an MSP environment.
• Bachelor’s degree in accounting.
• Proficiency in accounting software like NetSuite.
• Proficiency in MSP software like ConnectWise.
• Experience with account reconciliation of all revenue and related accounts.
• Proficiency in Microsoft platforms: Excel, Word, Teams, etc.
• Managerial experience; will manage a team of 2.

Skills

• Strong verbal and written communication skills.
• Ability to meet deadlines, especially during month-end.
• A personality that aligns with customer service.
• Proactive problem-solving with a customer-first mindset.
• A collaborative mindset to work effectively across teams.
• Ability to manage multiple issues simultaneously and maintain strong attention to detail.
• Ability to work independently and manage time effectively.
• Identify and implement system and process improvements.

Benefits

• Competitive salary.
• Comprehensive health benefits.
• Unlimited paid time off.
• Opportunities for professional growth and development.
• Collaborative and supportive team environment.

Pay

90,000 - 105,000 USD per year.