Senior Payroll Specialist

About the role

The Role We are seeking a payroll professional to join our growing Finance & Accounting team at Thornton Tomasetti and take overall responsibility for processing the U.S. payroll. This role will report to the Global Payroll Manager and work closely with HR, Finance, IT, and external payroll vendors.

Responsibilities

• Own the end-to-end processing of the bi-weekly U.S. payroll for 1,300+ employees in Workday.
• Review payroll inputs, reports, and integrations to ensure payroll is processed accurately and on time.
• Resolve payroll discrepancies, adjustments, and employee inquiries in a timely manner.
• Ensure compliance with U.S. federal, state, and local payroll tax and reporting requirements.
• Review payroll tax filings, reconciliations, and vendor-generated reports for accuracy.
• Partner with HR, Finance, IT, and payroll vendors to resolve issues and support payroll operations.
• Maintain payroll procedures, controls, and documentation to support consistency, efficiency, and audit readiness.
• Support year-end activities, audits, and the transition to a new global payroll platform.

Requirements

• Bachelor’s degree required.
• Experience with end-to-end processing of high-volume U.S. multi-state.
• Workday Payroll experience required; ADP Workforce Now experience a plus.
• Strong knowledge of payroll laws, tax requirements, and reporting obligations.
• Strong analytical, problem-solving, and reconciliation skills.
• Excellent attention to detail, organization, and follow-through.
• Strong written and verbal communication skills with a customer-focused approach.
• Able to handle confidential information with discretion and integrity.
• Able to work independently and manage deadlines in a fast-paced environment.

Qualifications

• Strong analytical, problem-solving, and reconciliation skills.
• Excellent attention to detail, organization, and follow-through.
• Strong written and verbal communication skills with a customer-focused approach.
• Able to handle confidential information with discretion and integrity.
• Able to work independently and manage deadlines in a fast-paced environment.

Skills

• Strong analytical, problem-solving, and reconciliation skills.
• Excellent attention to detail, organization, and follow-through.
• Strong written and verbal communication skills with a customer-focused approach.
• Able to handle confidential information with discretion and integrity.
• Able to work independently and manage deadlines in a fast-paced environment.

Benefits

Depending on your employment status, benefits may include:

• Medical, Dental, Vision, Life, AD&D, Disability and other voluntary benefits.
• Flexible Spending Accounts for Medical and Childcare.
• Paid Time Off, Family Leave for New Parents, Volunteer Time.
• Tuition Reimbursement.
• Commuter Transit (where available).
• 401k retirement savings with Company matching on employee contributions and/or qualified student loan repayments.
• Fitness Reimbursement.
• And other various wellness, diversity/inclusion and employee resource programs and initiatives.