Sonia Mitchell

Payroll and Customer Service Professional with 6+ years of progressive payroll experience supporting organizations with up to 6,000 employees. Proven expertise in multi-state payroll processing, compliance, employee relations, payroll auditing, tax reporting, and HR collaboration. Experienced leader with a strong background in customer service, process improvement, and payroll systems including Dayforce, ADP Workforce Now, Trapeze, and Microsoft Office.

Recognized for accuracy, efficiency, and providing exceptional employee support.

Payroll Specialist - Mister Car Wash - Tucson, AZ

(2024-01 - 2026-06)

• Processed bi-weekly payroll for approximately 6,000 salaried and hourly employees across multiple states using Dayforce.
• Audited timecards, earnings, deductions, bonuses, and tax withholding data to ensure payroll accuracy.
• Served as the primary point of contact for employee payroll inquiries and issue resolution.
• Generated payroll reports analyzing overtime, earnings, taxes, and deductions to support management decision-making.
• Ensured compliance with federal, state, and local payroll regulations and company policies.
• Collaborated with HR and system analysts to troubleshoot payroll system issues and improve payroll processes.
• Maintained strict confidentiality of employee payroll information.

Payroll Supervisor - Tucson Transit Management (Sun Tran/Sun Van/Sun Link) - Tucson, AZ

(2021-08 - 2024-01)

• Supervised payroll operations for approximately 600 union and non-union employees.
• Ensured accurate and timely weekly payroll processing.
• Managed garnishments, deductions, retroactive pay adjustments, and final wage calculations.
• Interpreted collective bargaining agreements to ensure proper payroll administration.
• Served as the primary payroll contact for employees, managers, and department leaders.
• Partnered with Human Resources and Accounting to coordinate employee status changes and payroll adjustments.
• Assisted with quarterly and annual tax filings, audits, and W-2 processing.
• Identified and implemented process improvements to increase payroll efficiency and accuracy.

Payroll Technician - Tucson Transit Management (Sun Tran/Sun Van/Sun Link) - Tucson, AZ

(2020-10 - 2021-08)

• Processed payroll for 600+ employees while ensuring compliance with payroll regulations and company policies.
• Verified timekeeping records and payroll documentation.
• Resolved payroll discrepancies promptly and professionally.
• Prepared payroll reports related to earnings, taxes, deductions, and overtime.
• Maintained employee leave balances and payroll records.

Special Services Associate - Tucson Transit Management (Sun Tran) - Tucson, AZ

(2018-04 - 2020-03)

• Delivered exceptional customer service to visitors and transit customers.
• Processed customer payments accurately and maintained detailed records.
• Performed administrative support functions including data entry, filing, and document management.
• Responded to customer inquiries and resolved concerns in person, by phone, and via email.

Interim Office Manager - Tucson Transit Management (Sun Tran) - Tucson, AZ

(2019-06 - 2019-11)

• Supervised front office staff and daily office operations.
• Managed workflow, customer service activities, reporting, and office supply inventory.
• Prepared operational and financial reports for management review.

Customer Service Representative / Team Lead - Sitel Operating Corporation - Tucson, AZ

(2013-03 - 2018-01)

• Delivered high-quality customer support in a fast-paced call center environment.
• Consistently met or exceeded performance and quality metrics.
• Assisted in training and onboarding new employees.
• Monitored quality assurance standards and provided coaching to team members.
• Maintained accurate customer records and resolved complex customer concerns.

GED - Chula Vista Adult School

Business & Office Occupations Coursework - Sweetwater Union High School

Computer Applications/Data Entry Operator Coursework - Southwestern Community College