Accounts Receivable​/Payable Clerk

We are Natural Systems Design, a Washington-based environmental services and consulting firm. Founded in 2003, we are an interdisciplinary team with over 50 people with office locations in Seattle, Bellingham, and Port Angeles, Washington. We focus our efforts throughout Washington State. Our company was founded and grown with the intention of being a different kind of professional services and consulting company that prioritizes its people, science, the environment, and collectively making a positive impact.

The Accounts Receivable/Payable Clerk supports Natural Systems Design’s accounting department, with a primary focus on preparing accurate, timely project invoices for clients. This role works closely with project managers and accounting staff to gather billing information, resolve questions, and deliver invoices that meet client and contract requirements. Additionally, this role will support the accurate and timely processing of vendor invoices. The position also assists with routine accounting and administrative tasks.

NSD currently uses Deltek Ajera and plans to transition to Deltek Vantagepoint in the first quarter of 2027. The successful candidate will learn invoicing in Ajera, participate in training and testing for Vantagepoint, and adapt to the new system alongside the accounting department.

(Seattle and/or Hybrid)

• Prepare, review, and send client invoices in coordination with project managers and accounting staff.
• Confirm that invoices reflect project agreements, billing terms, approved expenses, and required supporting documentation.
• Maintain client billing contacts, invoice delivery instructions, and related project records.
• Respond professionally to client questions about invoices and help resolve billing discrepancies.
• Track invoice status, follow up on missing information, and assist with accounts receivable reporting and payment follow-up.
• Support the transition from Ajera to Vantagepoint, including training, testing invoice workflows, documenting procedures, and identifying issues.
• Coordinate vendor payments by gathering documentation, confirming payment details, and communicating payment status as directed by accounting staff.
• Assist with bank runs, including deposits and delivering banking documents.
• Assist with filing, recordkeeping, data entry, and other accounting tasks as assigned.

• Experience in accounts receivables and payables, invoicing, bookkeeping, or a related administrative accounting role.
• Strong attention to detail and ability to manage deadlines across multiple projects.
• Clear, courteous communication with clients and coworkers.
• Comfort learning accounting software and following documented procedures; experience with Ajera or Vantagepoint is helpful but not required.
• Proficiency with Microsoft Excel, Outlook, and other standard office tools.
• Ability to maintain confidentiality around financial, employee, client and vendor data.

Invoices are accurate, complete, and sent on time. Project managers and clients receive clear responses to billing questions. Accounting records stay organized, routine tasks move forward reliably, and the transition to Vantagepoint is supported by someone willing to learn and improve the process.

We offer a competitive salary and benefits, including up to a 4% match on 401(K), 7 paid holidays plus a day of service, and 4 weeks of paid time off accrued annually.

Pay is $25-$28 hourly, depending on experience.

The position's start date is flexible and will be negotiated with the selected candidate based on their availability.

We trust each other as professionals and respect each other as people. For us, this means staff have the…