Senior Payroll Specialist

Thornton Tomasetti applies engineering and scientific principles to solve the world's challenges. An independent organization of creative thinkers and innovative doers collaborating from offices worldwide, our mission is to bring our clients' ideas to life and, in the process, lay the groundwork for a better, more resilient future. We provide support and opportunities to our employees to achieve their full potential and cultivate a rewarding career. 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. This is an excellent opportunity for a payroll professional who wants ownership of the core portion of North America payroll operations while also contributing to process improvements, compliance, and the implementation of a new global payroll platform. What You'll Do 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. What You'll Bring 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. Ability to handle confidential information with discretion and integrity. Ability to work independently and manage deadlines in a fast-paced environment. Compensation The rate for this position generally is $80,000 - $110,000 annually. This range is a good faith estimate provided pursuant to the New York Pay Transparency Law. It is based on what a successful New York applicant might be paid and assumes that the successful candidate will be in New York or perform the position from New York. Similar positions located outside of New York will not necessarily receive the same compensation. Actual pay rates may vary from the range, as permitted by New York Equal Pay Transparency Law. Compensation offers will be based on various factors, including operational needs, individual education, qualifications and experience, work location and comparison to employee already in the role, as well as other considerations permitted by law. A potential new employee's pay history will not be used in compensation decisions. 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 Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records. Thornton Tom setti is