Senior Payroll Specialist - Global

Job Description: We are seeking an experienced Senior Payroll Specialist (Global) to manage multi-regional payroll operations across Canada, Italy, China, Mexico, and additional global locations. This role involves close coordination with Employer of Record (EOR) partner Deel. International payroll experience is required; expertise in Italian, Chinese, or Mexican payroll is a plus but not mandatory.

Key Responsibilities: Process end to end payroll for multiple countries (e.g., Canada, Italy), ensuring timely and accurate execution. Assist with end to end payroll setup in Mexico.

Oversee payroll operations and manage invoices through EOR partner, Deel, across regions including APAC, LATAM, and EMEA.

Ensure compliance with local tax regulations and manage employer payroll account registrations as needed.

Collaborate with payroll vendors to resolve tax notices, support audits, and facilitate system transitions or process updates.

Coordinate with Treasury to ensure timely payroll funding and related tax payments.

Prepare and submit payroll reports for accounting and equity

Maintain accurate and synchronized employee data across Workday, Immedis/UKG, Velocity, Deel, and Fidelity.

Support year-end payroll processing, documentation, and reporting.

Respond promptly to payroll-related employee inquiries.

Partner with HR, Benefits, and Finance teams to ensure data integrity

Qualifications:   Bachelor’s degree in Accounting, Finance, or related field; Payroll certification (CPP) is a plus.

In-house end to end payroll management would be an advantage

Ideally 3-5 years’ experience managing payroll across multiple regions or countries

Strong knowledge of international payroll compliance

Proficient in Deel, or similar payroll systems; experience with Immedis/UKG and Workday is advantageous.

Advanced Excel skills

Proven track record managing sensitive information and exceptional attention to detail required 

About Integral Ad Science: Integral Ad Science (IAS) is a leading global media measurement and optimization platform that delivers the industry’s most actionable data to drive superior results for the world’s largest advertisers, publishers, and media platforms. IAS’s software provides comprehensive and enriched data that ensures ads are seen by real people in safe and suitable environments, while improving return on ad spend for advertisers and yield for publishers. Our mission is to be the global benchmark for trust and transparency in digital media quality. For more information, visit integralads.com.

Equal Opportunity Employer: IAS is an equal opportunity employer, committed to our diversity and inclusiveness. We will consider all qualified applicants without regard to race, color, nationality, gender, gender identity or expression, sexual orientation, religion, disability or age. We strongly encourage women, people of color, members of the LGBTQIA community, people with disabilities and veterans to apply.

California Applicant Pre-Collection Notice: We collect personal information (PI) from you in connection with your application for employment or engagement with IAS, including the following categories of PI: identifiers, personal records, commercial information, professional or employment or engagement information, non-public education records, and inferences drawn from your PI. We collect your PI for our purposes, including performing services and operations related to your potential employment or engagement. For additional details or if you have questions, contact us at compliance@integralads.com.

Attention agency/3rd party recruiters: IAS does not accept any unsolicited resumes or candidate profiles. If you are interested in becoming an IAS recruiting partner, please send an email introducing your company to recruitingagencies@integralads.com. We will get back to you if there's interest in a partnership.

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