Harris Computer Systems is seeking an ACCOUNTS RECEIVABLE (AR)/BILLING CLERK to work closely with fellow AR staff and the Accountant in providing accounts receivable support for the division. The successful applicant will be working in the Working Capital group along with a team of highly motivated individuals who are engaged in continuous improvement. This position will be based in our Ottawa office with the option to work remotely out of their home. The incumbent must be resourceful, inquisitive, self-motivated, possess strong interpersonal skills and be capable of handling high work volumes with accuracy during peak periods. This is a 6-month contract position. What you'll be doing? - Invoicing, credits, debits, etc. (customer account maintenance) - Proactively communicating to Business Units on problem accounts - Working with the Collections Department to resolve customer billing issues. - Providing timely responses to customer and employee requests for information - Preparing information required for the month-end, quarter-end and financial audit and interact with the audit team members in a professional manner - Contacting clients to arrange invoice payment, update client information and resolve disputes - Reconciling billable travel revenue account with the expense account monthly - Reconciling other accounts as needed/required - Other duties as assigned/requested Organization & Time Management: - Responsible for ensuring customer documentation is filed and organized accurately and in a timely fashion - Able to identify areas of concern and brings it to the attention of their manager - Communicates to supervisor if deadlines will need to shift - Manages priorities effectively and efficiently between the Sales & Support, Finance, and customers Salary: $21 per hour. About us: Harris is a leading provider of mission critical software to the public sector in North America. As a wholly owned subsidiary of Constellation Software Inc. (“CSI”, symbol CSU on the TSX), Harris has become the cornerstone for CSI’s investment in utility, local government, school districts, public safety, and healthcare software verticals. Our success has been realized through investments in our proprietary software and market expertise. This focus, combined with acquiring businesses that build upon or complement our offerings, has helped drive our success. Harris will continue to growth through reinvestment – both in the people and products that we offer and making investments in acquiring new businesses. *Only successful candidates will be contacted*. Harris is committed to an equal opportunity employment program, and applications from members of targeted groups, including women, persons with disabilities, Indigenous peoples, and visible minorities, are encouraged. If you are a person with a disability, you may receive assistance with the screening and selection process upon request. The Harris Talent Acquisition team does not use text messages to communicate with candidates or solicit confidential information. We encourage all candidates to apply for posted positions. They will be contacted by either a Harris manager or a member of the Talent Acquisition team for an interview, provided they meet the required criteria.

• The AR Specialist is responsible for collection efforts on Insurance Accounts • Will handle the accounts receivable for Ambulatory Surgical Centers • Submit appeals and research denials from Insurance Carriers • Work accounts receivable as assigned • Follow up on denials in a timely manner • Demonstrated experience with writing appeals, initiating appeals/follow-up on appeals • Must be comfortable interacting with insurance representatives • Excellent organizational, communication & time management skills • Knowledge of managed care contracts (i.e fee schedules and allowables) • Experience working with non-participating providers • Must have a clear understanding of the insurance collection process • Ability to solve problems associated with tasks

• Oversee the daily operations of the Invoicing Operations team, ensuring accurate and timely invoice generation for clients while providing day-to-day tactical support as needed. • Manage invoicing cycles and ensure invoices align with contract terms, pricing agreements, and client requirements. • Implement process improvements to streamline invoicing operations, improve accuracy, and reduce errors. • Act as an escalation point for complex invoicing issues, discrepancies, and client disputes. • Collaborate with cross-functional teams to resolve invoicing-related inquiries and maintain accurate billing records. • Ensure compliance with company policies, accounting standards, and client contract obligations. • Support internal audits, provide necessary documentation, and resolve issues related to billing accuracy. • Generate reports on invoicing accuracy, volume, aging, and performance metrics to present to senior leadership. • Help improve RigUp’s working capital cycle by addressing any issues across the payment and invoicing lifecycle, including data integrity, process improvement and dispute resolution.

• Help manage the day-to-day execution of invoicing operations to ensure accuracy, timeliness, and compliance with client contracts. • Mentor and support teammates by providing guidance, troubleshooting assistance, and peer training. • Partner with the team manager to support onboarding and cross-training efforts, including documenting and sharing process knowledge. • Assist in prioritizing team workload and flag potential bottlenecks or resourcing gaps. • Help foster a positive and collaborative team culture by encouraging open communication and continuous learning. • Participate in team meetings, help drive engagement, and contribute to knowledge sharing across the group. • Step in to assist with invoice preparation and submission during peak periods or complex scenarios. • Serve as a go-to resource and subject matter expert (SME) for invoicing processes, tools, and best practices. • Identify and escalate workflow challenges or recurring issues to the Manager, proposing solutions and process enhancements. • Track operational metrics and KPIs to support reporting and continuous improvement initiatives. • Coordinate or lead small-scale projects to enhance invoicing workflows, system automation, or team training. • Support weekly and monthly net revenue checks by reviewing invoice data, ensuring accuracy in revenue recognition, and collaborating with Finance to confirm alignment with reporting timelines. • Facilitate communication and alignment between the Invoicing Operations team and key stakeholders.