Senior Staff Accountant

SewerAI Corporation•Walnut Creek, CA

About The Position

SewerAI is transforming underground infrastructure management through AI-powered inspection and risk analysis. Our platform helps contractors, engineering firms, and utilities unlock valuable insights from sewer inspection data—turning hours of manual video review into actionable intelligence in minutes. After doubling our customer base over the past year, we’re now entering an exciting phase of accelerated growth. We're hiring a detail-driven Senior/Staff Accountant who takes pride in getting it right and wants to be part of building something. As SewerAI scales rapidly, you'll own the processes that ensure every dollar we've earned is invoiced accurately, collected efficiently, and recorded cleanly. You will lead our accounts receivable and billing operations which include managing the full invoice-to-cash cycle, driving collections on past-due accounts, and resolving billing discrepancies. Reporting to the Accounting Manager, you'll be someone we rely on to keep cash flowing, customers accountable, and our AR aging tight. This is a role for a sharp, organized professional who can execute at a high level today while helping us build the billing and collections infrastructure we'll need as we scale.

Requirements

Bachelor’s degree in Accounting, Finance, or related field required.
4–6+ years of progressive accounting experience (CPA or CPA candidate preferred).
Minimum 2 years of hands-on accounts receivable, billing, and collections experience required.
Experience with general ledger accounting, reconciliations, and financial close processes.
Strong knowledge of GAAP.
Experience with accounting systems.
Advanced Microsoft Excel skills (pivot tables, lookups, data analysis).
Strong analytical and problem-solving skills.
Excellent attention to detail and organizational skills.
Ability to manage multiple priorities and meet deadlines.
Strong communication skills and ability to collaborate cross-functionally.

Nice To Haves

Experience supporting or participating in a revenue system or billing platform implementation a plus.

Responsibilities

Play an active role in SewerAI's implementation of a modern revenue and billing platform, one that connects Sales, Customer Success, and Finance into a single, seamless quote-to-cash engine.
Partner cross-functionally to map current billing workflows, identify gaps, and help configure the system to reflect how we invoice and collect.
Serve as a key contributor on the Finance side of the implementation, ensuring AR and billing processes are built for hyper scale.
Conduct regular meetings cross functionally with other departments to manage accounts receivable.
Support cash application and AR reconciliation processes, while actively monitoring aging reports and following up on past-due invoices to keep collections current.
Create and maintain a standardized customer communication workflow for collections, including outreach templates, escalation cadences, and documentation standards, so every customer interaction is consistent, professional, and trackable.
Maintain documentation of collection activities and account resolutions in a fast-paced, high-growth environment where volume and complexity are increasing quickly.
Record and review daily cash transactions and ensure accurate posting to the general ledger.
Perform monthly bank reconciliations and investigate variances.
Monitor cash balances and assist with short-term cash forecasting.
Ensure proper recording of cash receipts, transfers, and adjustments.
Maintain strong internal controls over cash processes.
Review and process vendor invoices to ensure proper coding and approvals.
Manage payment runs including ACH, wire, credit card, and check payments.
Maintain vendor master data and ensure compliance with company policies.
Resolve vendor inquiries and discrepancies in a timely manner.
Review and process employee expense reports to ensure compliance with company policies, proper documentation, and accurate general ledger coding.
Assist with year-end reporting, including 1099 preparation.
Prepare and review monthly balance sheet reconciliations.
Analyze account activity and investigate discrepancies.
Support and help drive the month-end and year-end close process.
Prepare and post journal entries related to accruals, prepaid expenses, and adjustments.
Maintain organized reconciliation schedules and supporting documentation.
Ensure compliance with company policies and internal control procedures and assist in developing and documenting accounting policies and procedures.
Support audit requests and provide required schedules and documentation.