Billing Specialist

Sia is a next-generation, global management consulting group. Founded in 1999, we were born digital. Today our strategy and management capabilities are augmented by data science, enhanced by creativity and driven by responsibility. We're optimists for change and we help clients initiate, navigate and benefit from transformation. We believe optimism is a force multiplier, helping clients to mitigate downside and maximize opportunity. With expertise across a broad range of sectors and services, our 3,000 consultants serve clients worldwide from 48 locations in 19 countries. Our expertise delivers results. Our optimism transforms outcomes.

Job Description

We are seeking a
highly organized, detail-oriented, and experienced Billing Specialist
to join our dynamic and collaborative Finance team. This is a key role within our North American operations, responsible for managing the
entire billing cycle
for a diverse portfolio of client projects across both the U.S. and Canada. Your expertise will directly contribute to the accuracy, efficiency, and integrity of our financial processes.

In this role, you will work
closely with the North America Billing Manager
, internal teams, and external stakeholders to ensure that billing and invoicing activities are performed on time, in compliance with contractual terms, and aligned with company policies. You will be expected to take full ownership of the billing process—from
project and contract setup
, to
invoicing
,
timesheet reconciliation
, and
accounts receivable management
.

You will also serve as a point of contact for billing and contract structures, particularly
Time & Materials (T&M)
and
Fixed Fee
billing models. This includes ensuring accuracy in project setup, identifying and resolving discrepancies in timesheets and client systems, and communicating effectively with partners, account managers, and clients.

This position is ideal for someone with a strong background in billing, accounting, and client service—especially within a
consulting or professional services environment
—who is confident working in fast-paced, deadline-driven settings. The successful candidate will bring
advanced skills in Excel, Outlook,
accounting systems such as SAGE Intacct, and internal time tracking systems, along with the ability to analyze data, manage multiple priorities, and collaborate across departments.

Location & Work Structure:

• Must be based in the Greater Toronto Area with the ability to travel to our downtown Toronto office.
• Role is hybrid, up to 2-3 days in-office per week.

Key Responsibilities:

Billing Setup & Project Management

• Set up new clients and projects in Alibeez (in-house application) and SAGE Intacct.
• Validate data accuracy and follow up with Partners/Account Managers for missing details.

Invoicing & Reconciliation

• Reconcile employee timesheets (internal vs. client-facing systems).
• Prepare accurate invoices for Partner/Account Manager approval—includes Time & Material and Fixed Fee billing.

Accounts Receivable (A/R) Management

• Monitor and manage overdue receivables with internal and external stakeholders.
• Apply cash receipts in SAGE Intacct and perform client account reconciliations.

Project Financial Analysis

• Analyze and manage WIP (Work in Progress).
• Ensure projects are fully invoiced before closure; process closeout entries (profit/loss).

Communication & Documentation

• Manage shared inboxes for invoicing, timesheets, and AR inquiries.
• Support audits, organize digital files, and help develop document archiving policy.
• Collaborate closely with Finance teams across Canada, US, and France.

Qualifications

Required Skills & Qualifications:

• 5+ years of billing/accounting experience.
• Bachelor's degree in Accounting, Finance, or Business, or an equivalent combination of education and relevant work experience
• Advanced proficiency in Microsoft Excel and Outlook.
• Strong experience with SAGE Intacct or a similar system and internal timesheet systems.
• Subject matter expert in client billing, including Fixed Fee and Time & Materials contracts.
• Highly organized with strong attention to detail and ability to work under pressure.
• Excellent interpersonal, written, and verbal communication skills.
• Proven ability to work independently and manage competing priorities.
• Strong customer service orientation and team collaboration skills.
• Experience in consulting or professional services is a strong asset.

Technical Tools & Systems:

• Microsoft Office 365
  : Excel, Outlook, Teams, Word, PowerPoint
• Accounting
  : SAGE Intacct (or similar systems)
• Timesheets/Billing
  : Alibeez (or similar internal systems)
• Vendor Management Systems (Asset)
  : Beeline, Fieldglass, Coupa, IQN Navigator

Additional Information

Sia is an equal opportunity employer. All aspects of employment, including hiring, promotion, remuneration, or discipline, are based solely on performance, competence, conduct, or business needs.