Accounting Associate

About Us

Trevi Systems, Inc. is a Sonoma County, CA based technology developer who first pioneered the development and commercialization of low energy, green, and sustainable Forward Osmosis (FO) water purification to desalinate salt and brackish water as well as clean industrial and municipal wastewater. Building on these technical capabilities and experience, Trevi has continued to innovate and has now evolved into a provider of sustainable water treatment and brine concentration solutions for a variety of markets and industries, including farmers and cities in California and other states, and a variety of industrial water users in the U.S. and overseas.

We are seeking a highly detail-oriented Accounting Associate to support our accounting operations, with a primary focus on accounts payable and related transactional work. This role is a hands‑on role, ideal for someone who is energized by startup environments, thrives on accuracy and ownership, and is eager to grow their accounting skills as the company scales.

• Associate's or Bachelor's degree in accounting, Finance, or related field or equivalent practical experience.
• 3+ years of hands‑on accounting experience, with a strong emphasis on accounts payable.
• Familiarity with accounting software and AP automation tools;
  Quick Books preferred.
• Proven ability to manage AP independently with minimal supervision.
• Exceptional attention to detail—accuracy matters deeply in this role.
• Strong Excel skills (comfortable with formulas, reconciliations, and data organization, pivot tables).
• Working knowledge of general ledger accounting and how AP flows into financial statements.
• Familiarity with fund accounting (or restricted funds) is a plus.
• Organized, thorough, and reliable; follows processes and meets deadlines.
• Self‑starter who can take direction and execute efficiently.
• Comfortable in a startup environment—fast‑paced, evolving, and hands‑on.
• Patient, professional, and collaborative communication style.
• Interest in expanding into broader accounting responsibilities over time.

• Manage full‑cycle accounts payable, including invoice processing, coding, approvals, and payment preparation.
• Execute regular check runs and electronic payments with precision and timeliness.
• Maintain accurate vendor records and respond to vendor inquiries.
• Reconcile AP subledger to the general ledger.
• Assist with general ledger activities, including reconciliations and supporting schedules; exposure to fund accounting a plus.
• Support month‑end close activities related to AP and expense reporting.
• Prepare and maintain schedules and reports using Excel (high attention to accuracy required).
• Assist with expense reports and corporate card reconciliations.
• Maintain organized documentation and ensure audit‑ready records.
• Collaborate closely with internal stakeholders to ensure timely and accurate processing.
• Take on additional accounting responsibilities over time as the company grows.

• Opportunity to join at a pivotal growth moment.
• Hands‑on exposure to a scaling finance function.
• Ability to grow the role as the company expands.
• Collaborative, entrepreneurial team environment.

$30 to $37 / Hour

• Medical, dental, vision, life insurance.
• Vacation accruals.
• Professional development opportunities.