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Senior Payroll Accountant

T-Rex Solutions
Washington, DC Full Time
POSTED ON 10/23/2025 CLOSED ON 12/22/2025

What are the responsibilities and job description for the Senior Payroll Accountant position at T-Rex Solutions?

T-Rex Solutions is seeking a Senior Payroll Accountant to join our back office team. This individual will work closely with T-Rex Accounting Management as well as our Benefits Management and People Operations teams. They will have experience working on a team of accounting professionals in the delivery of information and coordinating with internal and external stakeholders. This multifaceted team member will embody a commitment to the highest levels of integrity and company values.

Responsibilities:

  • Process semi-monthly payrolls and occasional off-cycle payrolls
  • Review quarterly and year-end federal, state, and local payroll tax filings, and work with payroll provider (ADP) to research and resolve any issues with the filings
  • Manage payroll tax registrations and ensure withholding and unemployment tax accounts are current and in good standing
  • Work closely with the Benefits Manager to ensure all employee benefits are processed correctly
  • Monitor employee timesheet and expense report submissions and process reimbursements
  • Conduct timesheet training with new hires
  • Perform periodic floor checks to ensure employees' compliance with DCAA timesheet standards

Requirements:

  • Bachelor's degree
  • 5 years payroll processing experience, including multi-state processing (familiarity with state reciprocity and payroll regulations in states, including but not limited to MD, DC, VA, CA, NY, NJ, OH, and PA)
  • 5 years accounting experience (general ledger, account reconciliations, invoicing, accounts payable, financial close, analysis)
  • Experience working with the ADP payroll system
  • Knowledge of state, local, and federal payroll tax and compliance matters, and resources for researching any issues that come up
  • Intermediate to advanced proficiency with Microsoft Excel
  • High degree of accuracy and attention to detail in all work
  • Ability to identify and implement process improvements
  • Ability to work toward strict deadlines and manage competing priorities

Desired Skills:

  • Fundamental Payroll Certification (FPC) and/or Certified Payroll Professional (CPP), or interest in working toward them over time
  • Experience with Unanet general ledger and timesheet software

T-Rex Overview

Established in 1999, T-Rex Solutions, LLC is a proven mid-tier business providing data-centric mission services to the Federal government as it increasingly tries to secure and leverage the power of data. We design, integrate, secure, and deploy advanced technical solutions for our customers so they can efficiently fulfill their critical objectives. T-Rex offers both IT and professional services to numerous Federal agencies and is a leader in providing high quality and innovative solutions in the areas of Cloud and Infrastructure Services, Cyber Security, and Big Data Engineering.

T-Rex is constantly seeking qualified people to join our growing team. We have built a broad client base through our devotion to delivering quality products and customer service, and to do that we need quality individuals. But more than that, we at T-Rex are committed to creating a culture that supports the development of every employee's personal and professional lives. T-Rex has made a commitment to maintain the status of an industry leader in compensation packages and benefits which includes competitive salaries, performance bonuses, training and educational reimbursement, Transamerica 401(k) and Cigna healthcare benefits.

T-Rex is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, religion, color, sex (including pregnancy and sexual orientation), parental status, national origin, age, disability, family medical history or genetic information, political affiliation, military service, or other non-merit based factors.

In compliance with pay transparency guidelines, the annual base salary range for this position is $65,000 - $91,000. Please note that the salary information is a general guideline only. T-Rex considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/training, key skills, internal peer equity, as well as market and business considerations when extending an offer.

T-Rex offers a diverse and collaborative work environment, exciting opportunities for professional growth, and generous benefits, including: PTO available to use immediately upon joining (prorated based on start date), paid parental leave, individual and family health, vision, and dental benefits, annual budget for training, professional development and tuition reimbursement, and a 401(k) plan with company match fully vested after 60 days of employment among other benefits.

Salary : $65,000 - $91,000

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