Part-Time Payroll, Accounts Payable, and Office Administration

This is a part-time role, 20-25 hours per week, with one flexible day per week on site. About PHNX PHNX Materials is the world’s first solids’ refinery company. We extract 30+ critical metals from industrial waste while selling 100% of the input feed as co-products. We are unlocking America's domestic supply of critical minerals. About The Role PHNX Materials is seeking a part-time Payroll & Office Administrator to manage payroll and keep essential office operations running smoothly. You’ll own accurate, timely payroll processing, maintain records in QuickBooks, coordinate office services, and ensure incoming checks, bills, and requests reach the right people. This role requires exceptional attention to detail, sound judgment, and consistent follow-through. You’ll work 20-25 hours per week, including one day in the office each week; the on-site day is flexible, with availability around payroll deadlines required. What You’ll Do Process payroll accurately and on time, verifying time records, pay rates, deductions, and employee changes before submissionReview payroll reports, resolve discrepancies, and obtain required approvals before processingMaintain accurate QuickBooks entries and organized, confidential payroll and financial recordsProcess and pay vendor invoices with appropriate approvals, tracking due dates and payment confirmationsManage internal Payroll and Benefits management systemPrepare and submit invoices to third parties for payment, maintain supporting documentation, and follow up on outstanding balancesReceive, log, and route incoming checks, bills, and mailCoordinate janitorial services, office supplies, and other routine office needsRoute questions and documents to the appropriate person and follow through until resolvedEscalate missing information, discrepancies, and time-sensitive issues early enough to prevent missed deadlinesMaintain clear checklists and records so recurring tasks are completed reliably What We’re Looking For Hands-on experience with payroll, QuickBooks, vendor payments, and submitting invoices to third parties for paymentExceptional attention to detail, with a demonstrated record of payroll accuracy and careful verificationStrong organization, discretion, and follow-through; sound judgment about routing information and escalating issuesAbility to work independently within a part-time schedule, meet payroll deadlines, and work on site one flexible day per week Nice to Have Experience supporting a manufacturing, industrial, or plant-based businessExperience coordinating janitorial services and other office vendorsComfort with spreadsheets and improving administrative checklists and processesExperience working with an external accountant, bookkeeper, or payroll provider