Accounting Clerk (Invoicing) – Markham, ON. - Full Time – ID# 7199
PTAG is seeking a detail-oriented Accounting Clerk to support the Finance team, with a primary focus on client invoicing and billing accuracy. The ideal candidate will have hands-on experience with NetSuite and a strong understanding of invoicing and accounts receivable processes.

The Chance
Are you ready to make an impact in the Power Generation, Energy, and Infrastructure industries? Join PTAG, a leading Project Management Advisory & Services firm, recognized across North America for helping world-class clients deliver major capital projects successfully.

About PTAG
At PTAG, we help our clients plan, manage, and execute their most challenging projects with innovation, integrity, and collaboration.

Our mission
is to help our clients achieve successful delivery and efficient operation of their capital projects.

Our vision
is to support global leaders in the selection, planning, and execution of their major initiatives.

Our Values Include

Safety: The safety of our employees, suppliers, and clients is always the top priority.

Collaboration: We build true partnerships with clients and service providers.

Leadership: We elevate project performance through the application of best practices.

Accountability: We take responsibility for every aspect of our engagements.

Client Satisfaction: We strive for 100% satisfaction on every project.

Integrity: We believe in open and transparent communication at all levels.

Role & Responsibilities

Prepare, generate,



and issue client invoices in NetSuite in accordance with contracts, rate sheets, and project agreements

Review billing data for accuracy, completeness, and required approvals

Coordinate with Project Managers, Project Controls, and Operations to resolve billing discrepancies

Maintain invoicing schedules and ensure invoices are issued accurately and on time

Track invoice status and assist with follow-up on outstanding or disputed invoices

Maintain organized billing records and supporting documentation

Assist with month-end close activities related to invoicing and revenue

Enter and validate accounting data in NetSuite

Support audits by providing invoicing and billing documentation

Perform other accounting and administrative duties as require

Required Qualifications

Diploma or certificate in Accounting, Finance, or a related field

1–3 years of experience in an accounting, billing, or accounts receivable role

Strong understanding of invoicing and AR processes

High attention to detail and accuracy

Proficiency with Microsoft Excel

Strong organizational and communication skills

Preferred Qualifications

Experience using NetSuite for invoicing or accounts receivable





Experience in professional services, engineering, construction, or project-based environments

Familiarity with time-and-materials, cost-plus, or milestone billing

Basic knowledge of revenue recognition principles

Key Competencies

Detail-oriented with a focus on accuracy

Ability to manage multiple deadlines

Proactive problem solver

Strong follow-up and accountability

Professional and collaborative working style

Compensation at PTAG varies depending on a wide array of factors, which may include but are not limited to the specific office location, role, skill set and level of experience.

Why Join PTAG?
At PTAG, you’ll be part of a dynamic, growing consulting firm that values professional development, collaboration, and innovation.

Opportunity to work on major infrastructure and capital projects.

Exposure to industry-leading clients and partners.

Competitive compensation and comprehensive benefits package.

Flexible work environment and opportunities for advancement.

Employee Share Purchase Plan (ESPP).

A culture that values safety, accountability, and excellence.

PTAG is proud to be an equal opportunity employer committed to fostering a diverse and inclusive workplace.

PTAG uses AI-enabled tools to support certain aspects of the recruitment process, including reviewing applications against job-related criteria. These tools are used to assist our recruiters. All hiring decisions are made by PTAG recruiters and hiring managers.

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📌 Accounting Clerk (Invoicing) (Ontario)
🏢 PTAG
📍 Ontario