Senior Accounting Manager

BillionToOne•Menlo Park, CA

22h

About The Position

The Senior Accounting Manager will oversee the accounting operations of BillionToOne as it enters its first full year of SOX 404(b) compliance as a newly public company. Reporting to the Director of Accounting, this role manages the month-end and quarter-end close, owns the integrity of the general ledger, and serves as a named control owner within the SOX framework. The manager leads a team of GL and AP accountants, serves as a primary day-to-day contact for external auditors, and owns the monthly management reporting package, including flux analysis and cost-per-test economics. The role is suited to an experienced accounting leader who can drive operational and process improvements in a fast-paced, post-IPO environment.

Requirements

8–10+ years of progressive accounting experience, including 3+ years managing the close and leading a team of direct reports.
CPA required, with deep US GAAP fluency.
Hands-on SOX 404(b) experience as a control owner, including familiarity with control narratives in functional areas outside accounting and reporting, IPE requirements, and deficiency remediation.
Strong NetSuite experience, including the ability to query the system directly using saved searches.
Advanced Excel and analytical abilities.
Excellent communication and interpersonal skills, with the ability to collaborate effectively across departments.
Bachelor’s degree in Accounting, Finance, or a related field.

Nice To Haves

Post-IPO experience is strongly preferred.
Experience in life sciences, diagnostics, or another high-growth regulated industry.
Big 4 or national audit firm experience.
Experience with FloQast, Expensify, and Workiva.
SuiteQL experience.

Responsibilities

Manage the month-end and quarter-end close on a dependency-gated calendar in FloQast, including journal entry control logs, reconciliation sign-offs, and close checklist completion; improve close speed while maintaining quality and audit readiness.
Own the accuracy and integrity of the general ledger in NetSuite, reviewing recurring and non-standard journal entries and balance sheet reconciliations across the full account population, and resolving posting and configuration issues at their root cause.
Serve as a named owner and reviewer for financial reporting, general ledger, and close-cycle SOX controls; maintain control narratives and supporting documentation, verify IPE completeness and accuracy, remediate deficiencies, and coordinate deliverables with business partners.
Act as a day-to-day contact for the external auditor and consulting advisors, managing PBC requests, walkthrough support, sample pulls, and interim and year-end fieldwork.
Own the monthly management reporting package, including month-over-month flux analysis by functional area, cost-per-test analytics for prenatal and oncology products, and a management summary for the CFO and leadership team.
Lead, mentor, and develop GL and AP accountants covering general ledger, fixed assets, accounts payable, and payroll; set expectations, establish review discipline, and build the team’s technical capabilities.
Operationalize technical accounting conclusions, including ASC 842 lease accounting and embedded lease assessment, ASC 730 R&D cost treatment, and self-funded health plan IBNR reserves.
Improve close and accounting processes to increase speed and efficiency while demonstrating operational compliance.
Provide senior oversight of the vendor master and disbursement control environment, partnering with Supply Chain to support and govern procurement across the AP and payment cycle.

Benefits

Multiple medical benefit options; employee premiums are paid 100% for select plans, and dependents are covered up to 80%.
Family Bonding Leave for eligible employees: 16 weeks, paid at 100%.
Supplemental fertility benefits coverage.
Retirement savings program with a 4% company match.
Paid time off increases with tenure.
Latest hardware, lab equipment, and facilities.
Free daily on-site lunches.
On-campus state-of-the-art gym and restaurant.
Free on-site EV charging.
Annual bonus eligibility.
New-hire equity grant of up to $110,000 at grant value, vesting over four years, plus annual equity refresh grants equal in value to the new-hire grant.
Competitive medical and dental coverage.
Competitive base pay.