Accounts Payable Administrator

Onyx Corporation; Acton (MA); On-site; USD 45,000 - 60,000; Full time

Job summary

Onyx Corporation in Acton, MA is seeking an Entry-Level Accounts Payable Specialist to support and process vendor invoices for construction projects. This role grows with you, handling invoice matching, approvals, and check runs while building knowledge of job costing and internal controls.

Strong attention to detail and reliable time management are essential; training and mentorship are provided to develop into a senior AP or construction accounting role.

Qualifications

• High school diploma required; associate degree preferred or equivalent experience.
• 1–2 years accounts payable experience; construction industry preferred but not required.
• Willingness to learn job cost accounting and use accounting software.

Responsibilities

• Process vendor and subcontractor invoices accurately.
• Match invoices to POs and receiving docs.
• Route invoices for project manager approvals.
• Assist with weekly or bi-weekly check runs.
• Maintain organized AP records.
• Respond to vendor inquiries on payment status.
• Reconcile vendor statements and resolve discrepancies.
• Assist 1099 prep and year-end reporting.
• Support month-end close and audits.
• Follow accounting procedures and controls.
• Answer phones professionally.
• Office supplies management.

Skills

Attention to detail

Time management

Communication

Procedural compliance

Teamwork

Education

High school diploma

AA degree or accounting coursework

Tools

Excel

Accounting software

Construction software

Job description

Entry-Level Role: The Accounts Payable Specialist is responsible for supporting and processing accounts payable functions for a construction company. This role is designed to accommodate both junior-level candidates and those with prior accounts payable experience, with responsibilities increasing as skills and knowledge develop. The position supports accurate job cost accounting, timely vendor and subcontractor payments, and compliance with construction industry requirements.

Key Responsibilities

• Enter and process vendor and subcontractor invoices accurately and in a timely manner
• Match invoices to purchase orders, contracts, and receiving documentation
• Route invoices for approval from project managers and supervisors
• Prepare and assist with weekly or bi-weekly check runs
• Maintain organized digital and physical accounts payable records
• Respond to vendor and subcontractor inquiries regarding invoice and payment status
• Reconcile vendor statements and resolve discrepancies with supervision as needed
• Assist with 1099 preparation and year-end reporting
• Support month-end close activities and audits
• Follow company accounting procedures and internal controls
• Order and maintain office supplies to ensure smooth daily operations
• Answer and route incoming phone calls in a professional and courteous manner
• Other duties as assigned

Qualifications

• High school diploma or equivalent required
• Associate degree or coursework in accounting or finance preferred, or equivalent work experience.
• 1-2 years of accounts payable experience; construction industry experience preferred but not required
• Basic understanding of accounting principles and willingness to learn job cost accounting
• Familiarity with accounting or construction-related software is a plus.
• Proficient in Microsoft Excel and basic office applications

Skills & Competencies

• Strong attention to detail and accuracy
• Effective time management and organizational skills
• Clear written and verbal communication
• Ability to follow established procedures while learning new responsibilities
• Team-oriented with the ability to work independently as skills develop

Work Environment & Growth

• Office-based position working closely with accounting staff and project managers
• Training and mentoring provided
• Opportunity for career growth into a senior Accounts Payable or construction accounting role