Part-Time Accounts Payable Specialist

Founded in 1998 with the specific mission of providing integrated ecological and engineering consulting services, Princeton Hydro offers mission-driven expertise in natural resource management, water resources engineering, geotechnical design and investigation, and regulatory compliance.

We’re looking for a detail‑oriented, proactive Accounts Payable Specialist to join our team on a part‑time basis (approximately 25 hours per week) in our Trenton, NJ headquarters. This role supports core accounting functions and vendor management. The ideal candidate is organized, comfortable juggling multiple responsibilities, and eager to build structure around recurring tasks.

CORE DUTIES AND RESPONSIBILITIES INCLUDE

• Manage AP and Purchase Journal posting, ensuring accuracy and timely entry.
• Process permit payments, primarily supporting field operations.
• Set up and maintain new vendor accounts, including collecting and reviewing W9s, COIs, and other required documentation; develop and maintain a vendor onboarding checklist.
• Post monthly journal entries such as rent, draws, and other recurring items.
• Set up and manage recurring payments through various vendor portals.
• Post pesticide notification invoicing and manage associated documentation: update binders, match affidavits to notices, and maintain organized records.
• Assist with AR delinquency analysis, including learning and applying new processes to monitor and report on outstanding accounts.

EDUCATION, SKILLS AND EXPERIENCE

• Experience in accounting, bookkeeping, and administrative operations.
• Strong attention to detail and comfort working with structured processes.
• Ability to manage recurring tasks while also improving workflows.
• Familiarity with vendor portals, journal entries, and AR/AP processes.
• Willingness to learn new systems (including Unanet).
• Reliable, organized, and able to work independently.
• Associate’s degree in accounting, finance, or related field preferred.
• If you don’t meet every qualification listed above but believe you would be a great fit at Princeton Hydro, we strongly encourage you to apply!

SCHEDULE

• Approximately 25 hours per week
• Hybrid: three five-hour days per week in the office; remaining hours remote.
• Flexible scheduling available within standard core hours.

WHAT WE OFFER

• 401(k) retirement plan with a discretionary 5% company match
• Vacation and Paid Time Off