Interstate Waste Services is the most progressive and innovative provider of solid waste and recycling services in the country! We primarily service Northern New Jersey, Southern New York State, New York City, Connecticut, with a state-of-the-art rail served landfill located in Ohio. We cater to a diverse range of residential, industrial and commercial customers. Our mission has always been to provide our customers with the highest quality waste, recycling and environmental services, while keeping focus on employees, customer and environmental safety. 

What makes our company culture unique is we have mastered the ability to balance the standards of a large corporate company while maintaining our small business family style culture. 

The Payroll and 401(k) Administrator is responsible for managing and executing payroll-related functions with a strong focus on 401(k) plan administration, compliance, and reporting. This role ensures accurate processing of garnishments, child support orders, and tax levies, and supports audit and compliance activities. The ideal candidate will have experience with Dayforce and a minimum of 3 years of hands-on experience managing 401(k) plans, including annual discrimination testing and reconciliation.

To perform this job successfully, an individual must be able to perform each essential duty satisfactorily.  Other duties may be assigned. 

Payroll Administration:

• Process and maintain garnishments, child support orders, and tax levies in accordance with federal and state regulations.
• Provide requesting agencies with employment status, support or payment information in a timely manner.
• Prepare and provide accurate payroll reporting as needed.
• Collaborate with HR and Finance teams to research and resolve discrepancies.
• Monitor HR ticket system and assist as first level response or assign to appropriate team members.
• Review incoming mail and distribute as needed.

401(k) Plan Administration:

• Administer the company’s 401(k) retirement plan, including employee enrollments, contributions, and distributions.
• Maintain accurate records of all 401(k) transactions and investment activities.
• Collaborate with vendors and recordkeepers to ensure smooth plan operations.
• Support employee inquiries regarding plan eligibility, loans, rollovers, and distributions.
• Reconcile 401(k) contributions and loan repayments between payroll and plan provider.
• Assist with annual compliance testing (e.g., ADP/ACP, Top-Heavy, 402(g), 415 limits).
• Help facilitate enrollment and educational workshops.
• Audit plan data for accuracy and completeness.

Compliance & Additional Support:

• Prepare and maintain detailed records for internal and external audits related to union benefits.
• Monitor regulatory changes and ensure compliance with federal, state, and union-specific requirements for retirement plans.
• Maintain and update SOPs and manual tracking systems.
• Coordinate with Payroll, HR, and Benefits teams to ensure accurate deductions and enrollments.
• Participate in projects to enhance reconciliation workflows and reporting accuracy.
• Support mergers/acquisition activity as needed.

Cross-Training & Collaboration:

• Cross-train with the Payroll Reconciliation Specialist to ensure coverage and continuity.
• Assist with union-related payroll and billing tasks as needed.

• Bachelor’s degree in Accounting, Finance, Human Resources, or related field (preferred).
• Minimum 3 years of experience administering 401(k) plans and payroll functions.
• Strong understanding of collective bargaining agreements, retirement plan regulations, and benefits compliance.
• Proficiency in Microsoft Excel, Outlook, PowerPoint, and HRIS/payroll systems (Dayforce/Ceridian preferred).
• Strong Excel skills and familiarity with payroll systems and retirement plan platforms.
• In-depth understanding of payroll laws, ERISA, IRS regulations, and 401(k) compliance requirements.
• Experience with garnishment processing and tax levy administration.
• Excellent attention to detail, analytical thinking, and problem-solving skills.
• Ability to manage multiple priorities and make independent decisions.
• High level of integrity and discretion when handling sensitive financial and personnel information

This job description is intended to be an accurate representation of the general functions of the job, rather than exhaustive list of duties, responsibilities, or experience. Other duties may be assigned, requested, or required. Aspects of the job may be altered without notice.

Interstate Waste Services provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.