PTAG, a leading project management advisory and services firm, is seeking an Accounting Clerk (Invoicing) in Markham, ON. You will support the Finance team with client invoicing, ensure accuracy, and collaborate with Project Managers to resolve billing discrepancies. The ideal candidate has 1–3 years in accounting/AR, strong Excel skills, and attention to detail. NetSuite experience is preferred; this role offers a full time, on-site position with a competitive benefits package.