Accounts Payable Specialist

MAS creates custom-engineered thermal management solutions for markets that thrive on flexibility, creativity, and bold ideas. From humble beginnings to becoming an emergent multi‑brand manufacturing leader, we’ve grown by bringing in great people and empowering them to do great work.

At MAS, we believe innovation happens when everyone contributes, diversity of thought is celebrated, and people feel supported in their growth. We take pride in working hard together, tackling challenges, solving problems, and having fun along the way. As we expand into both emerging and mission-critical industries, we stay committed to delivering efficient, competitive, and sustainable heating and cooling technologies. And throughout your career here, you’ll have the chance to directly shape the foundation for what's next in our industry.

The Accounts Payable Specialist is responsible for managing and processing vendor invoices, ensuring timely and accurate payments, and maintaining organized financial records. This role plays a key part in supporting the company’s financial operations, vendor relationships, and month-end close activities. This role will work closely with the AP/AR Supervisor and will be integral to supporting a growing multi-site manufacturing environment by ensuring efficient payables processes, accurate reporting, and consistent adherence to internal controls.

• Process, code, and enter vendor invoices accurately and in a timely manner, ensuring proper GL account, cost center, and project assignments.
• Perform three‑way match of purchase orders, receipts, and invoices, resolving quantity, pricing, and receiving discrepancies with Procurement and Operations.
• Verify appropriate approvals in accordance with the company’s internal control policies.

• Set up and maintain vendor master data, including W‑9 collection, tax classification, and banking details, in accordance with company policy and tax compliance requirements.
• Maintain an accurate AP aging report, proactively identify past‑due items, and elevate issues to internal stakeholders as needed.
• Establish and maintain strong vendor relationships while negotiating favorable payment terms; manage relationships with creditors and bank loans.
• Respond to vendor inquiries, research and resolve billing discrepancies, and support negotiations around payment terms in coordination with Finance and Procurement.
• Prepare and process weekly and ad hoc payment runs in line with vendor terms and company cash management priorities.
• Support monitoring of payment cycles and collaborate with the AP/AR Supervisor to optimize timing of disbursements and capture early payment discounts.

• Ensure accurate and timely posting of payments, including remittance details and discounts taken.
• Adhere to and reinforce internal controls over disbursements, including segregation of duties, documentation standards, and approval workflows.
• Assist with 1099 reporting by validating vendor classifications, monitoring reportable payments, and supporting annual information filings as requested.
• Ensure all AP activities comply with company policies, accounting standards, and relevant tax regulations.

• Prepare AP‑related journal entries and reconciliations, including AP sub‑ledger to GL reconciliations, accrued expenses, and GR/IR (goods received not invoiced) where applicable.
• Provide AP aging reports, cash disbursement details, and other supporting schedules for month‑end and year‑end close.
• Support weekly cash forecasting with accurate weekly disbursement reports.
• Support internal and external audits by gathering documentation, responding to audit requests, and maintaining organized electronic and physical records.

• Assist in continuous improvement initiatives to enhance AP efficiency, accuracy, and automation, including participation in ERP‑related projects and process standardization across sites.
• Identify opportunities to streamline workflows (invoice routing, approvals, and payment processes) and share…