Accounts Payable Specialist

S3 Maritime, LLC

S3 Off-Grid

West Coast Insulation

West Coast Waterjet

Position Title: Accounts Payable Specialist

Position Type: Full Time, Non-exempt, Hourly

Rate: $28.00+DOE

Schedule: Mon-Fri 7:30am-4:00pm, 30 min unpaid lunch

Overtime: Required as requested by management

Probationary Period: 90-Days

Benefits: Employer sponsored Medical, Dental, and Vision (30-day waiting period)

401K with Employer Matching: Yes, See Employee Handbook

PTO: Yes, See Employee Handbook

Position Summary

S3 Maritime is a leading marine service provider in the Greater Seattle area, supporting both commercial and recreational vessels with high-quality repair, refit, and maintenance services. We operate a fast-paced, hands-on environment where administrative accuracy directly supports field operations and project success.

We are seeking a detail-oriented and organized Accounts Payable (AP) Specialist to support our Accounting and Administrative teams. This role reports directly to the Accounting & Benefits Manager and plays a critical role in ensuring timely and accurate financial processing across vendor accounts, internal expenses, and service-related transactions.

The ideal candidate thrives in a dynamic office environment, is highly detail-driven, and can balance multiple responsibilities while maintaining accuracy and accountability.

Key Responsibilities

Accounts Payable & Financial Processing

• Accurately prepare, review, and process vendor invoices in a timely manner
• Maintain and track invoice due dates, including capturing early payment discounts
• Process weekly check runs and ACH payments, along with additional runs as needed
• Reconcile vendor statements and resolve discrepancies proactively
• Set up and maintain new vendor accounts and records
• Conduct annual vendor audits and maintain compliance documentation

Credit Card & Expense Management

• Validate charges on company credit accounts and vendor billing statements
• Reconcile company credit card statements against receipts and expense reports
• Enter and process employee expense reports with accuracy and timeliness

Audit, Reconciliation & Reporting

• Perform weekly audits of Service Order transactions, including:
• Expense approvals and reconciliations
• Aging transaction review
• Audit and validate Accounts Payable-related General Ledger accounts
• Identify discrepancies, report findings, and recommend corrective actions
• Review open Purchase Orders (filled but not completed) and coordinate follow-up

Operational & Administrative Support

• Provide phone and administrative support as needed
• Assist with AP-related logistics including:
• Vendor RMAs (returns)
• Customer returns and credit memos
• Process voided payments and monitor bank auto-deductions
• Track recurring monthly and annual expenses

Systems & Cross-Functional Support

• Support ERP-related processes (INFOR preferred)
• Assist with internal system coordination (Supporting HUB locations)
• Collaborate with Service, Purchasing, and Operations teams to ensure accurate job costing and financial tracking

Skills, Knowledge & Qualifications

• Minimum 1 year of Accounts Payable experience (required)
• Minimum 1 year of Relevant work in an Accounting Role in the past 2 years (required)
• Experience with ERP systems (Infor Cloud preferred, others acceptable)
• Strong working knowledge of Microsoft Excel and Office Suite
• High level of attention to detail and organizational skills
• Ability to multitask and manage competing priorities in a fast-paced environment
• Strong communication skills (written and verbal)
• Understanding of GAAP principles (preferred)
• Experience with collections (helpful but not required)

Work Environment & Expectations

• Office-based position
• Frequent interaction with technicians, vendors, and internal teams
• Ability to manage deadlines tied to financial cycles and operational schedules
• Professional, team-oriented mindset with a willingness to support multiple departments

Why Join S3 Maritime?

• Work in a unique and dynamic marine industry environment
• Be part of a highly skilled and collaborative team
• Exposure to complex service projects and real-world operational accounting
• Opportunity for growth within a rapidly evolving marine services company

Pay: From $28.00 per hour

Benefits:

• 401(k)
• 401(k) matching
• Dental insurance
• Health insurance
• Paid time off
• Vision insurance

People with a criminal record are encouraged to apply

Work Location: In person