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Senior Stock Plan Administrator

BillionToOne

Menlo Park, CAOnsitePosted 47 days ago$174,068 - $195,826
Full TimeSenior LevelCorporate FunctionsDiagnostics
Original posting ↗

Summary

The Senior Stock Plan Administrator is responsible for the day-to-day administration of the Company's equity compensation program. This role provides hands-on support for equity operations, stock-based compensation accounting, compliance, reporting, and employee communications. The ideal candidate will partner closely with Legal, Payroll, Accounting, People Operations, and external service providers to ensure accurate, compliant, and timely execution of all equity-related activities. This position will report to the Company's Controller.

Job description

Responsibilities

Equity Administration and Operations

  • Maintain accurate equity data and records within equity administration systems and administer equity plan across the full equity lifecycle.
  • Manage the end-to-end processing of equity transactions (grants, vesting, releases, exercises, cancellations, etc.) in the equity system.
  • Coordinate Employee Stock Purchase Plan (ESPP) enrollment and purchase cycles and ensure accurate processing and reconciliations in collaboration with Payroll and Fidelity Equity system.

Compliance and Reporting

  • Maintain and reconcile equity share pool balances; perform monthly reconciliations of shares outstanding and reserves with the transfer agent.
  • Assist with equity plan setup, maintenance, and governance.
  • Maintain accurate records and equity reconciliations and documentation to support internal/external audit readiness.
  • Analyze and reconcile equity data, perform audits, and prepare / review all month-end journal entries.
  • Support period-end close activities including stock-based compensation (SBC) accounting in accordance with ASC 718 and completing monthly and quarterly stock-based compensation close processes, ensuring accuracy in journal entries, accruals, and disclosures.
  • Responsible for compliance with year end tax reporting requirements.

Collaboration with Business Partners

  • Partner with Legal, Payroll, Accounting, and PeopleOps teams to ensure accurate, compliant, and timely execution of equity processes.
  • Assist Payroll teams with equity reporting, tax compliance and reconciliation activities.
  • Respond to employee inquiries regarding equity awards, vesting schedules, exercises, and taxation.

Audit and SOX Compliance

  • Maintain accurate records and documentation to support audit readiness.
  • Maintain SOX control documentation and perform assigned internal controls documentation to support SOX compliance.
  • Respond to auditor requests inquiries in a timely manner.

Process Improvement

  • Document processes, SOX narratives and support continuous improvement initiatives.
  • Identify opportunities to enhance equity processes and systems through integration and automation, improved controls, and workflow changes.

Qualifications

  • Bachelor's degree or equivalent experience (Business Administration, Finance, Accounting – plus)
  • 5+ years of hands-on experience in equity compensation within a public company
  • In-depth knowledge of equity platforms such as Fidelity Plan Sponsor Webstation® (or equivalent systems) and managing platform processes end-to-end
  • Strong understanding and experience of multiple types of equity (ISOs, NSOs, RSUs, ESPP) and related compliance, tax, and reporting requirements
  • Strong experience supporting internal/external audits and ensuring compliance with SOX and ASC 718
  • Experience managing complex reconciliations, close processes, and equity-related financial reporting
  • Strong organization, analysis, and communication skills
  • Ability to handle multiple priorities and meet deadlines
  • Proficiency in Microsoft Excel, Word, and PowerPoint
  • CEP certification or progress toward certification is a plus

Requirements

  • Bachelor's degree or equivalent experience (Business Administration, Finance, Accounting – plus)
  • 5+ years of hands-on experience in equity compensation within a public company
  • In-depth knowledge of equity platforms such as Fidelity Plan Sponsor Webstation® (or equivalent systems) and managing platform processes end-to-end
  • Strong understanding and experience of multiple types of equity (ISOs, NSOs, RSUs, ESPP) and related compliance, tax, and reporting requirements
  • Strong experience supporting internal/external audits and ensuring compliance with SOX and ASC 718
  • Experience managing complex reconciliations, close processes, and equity-related financial reporting
  • Strong organization, analysis, and communication skills
  • Ability to handle multiple priorities and meet deadlines
  • Proficiency in Microsoft Excel, Word, and PowerPoint
  • CEP certification or progress toward certification is a plus

Benefits

  • Medical, Dental & Vision
  • 100% employee premiums select plans
  • Dependents covered up to 80%
  • 16 weeks paid parental leave
  • Fertility benefits coverage
  • 401(k) 4% match
  • Paid time off increases with tenure
  • Free daily on-site lunches
  • On-site gym
  • Free on-site EV charging
  • Annual bonus
  • New hire equity grant
  • Annual equity refresh grants

Company overview

BillionToOne is a precision diagnostics company headquartered in Menlo Park, California, founded in 2016 with a mission to make molecular diagnostics more accurate, efficient, and accessible. The company has developed a proprietary Quantitative Counting Templates (QCT) molecular counting platform that can accurately count DNA molecules at the single-molecule level, enabling unprecedented sensitivity in disease detection. BillionToOne operates as a publicly traded company on NASDAQ under the symbol BLLN, having completed a successful IPO in 2025. The company's diagnostic platforms include UNITY Complete for non-invasive prenatal testing, which assesses fetal risk for recessive conditions and aneuploidies from a single maternal blood sample, and Northstar oncology products for cancer therapy selection and treatment response monitoring. With over 500 employees and multiple CLIA/CAP accredited laboratories, BillionToOne represents a significant advancement in quantitative molecular diagnostics, combining breakthrough science with scalable commercial operations to transform healthcare delivery.

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