Hadrian · 15 hours ago
Manager of Payroll and Stock Administrator
Los Angeles, CA
Full-time
Onsite
Mid, Senior Level
$110K/yr - $160K/yr
4+ years expHadrian is a rapidly scaling company focused on accuracy, trust, and operational rigor. They are seeking a Payroll and Stock Administrator to oversee the administration of payroll and equity programs, ensuring timely and accurate processing while maintaining compliance and supporting employee confidence in compensation programs.
AerospaceArtificial Intelligence (AI)Machinery ManufacturingManufacturingSupply Chain Management
Responsibilities
Own the execution of payroll across all employees, ensuring timely and accurate processing each pay period using Rippling or similar payroll systems
Manage payroll inputs including new hires, terminations, pay changes, bonuses, commissions, and corrections in partnership with People Operations and Finance
Reconcile payroll data between HRIS, payroll systems, and finance systems to ensure accuracy and alignment
Respond to employee payroll questions with accuracy, discretion, and professionalism
Support payroll audits, filings, and compliance requirements, including coordination with Finance and external partners as needed
Administer Hadrian’s equity programs, including stock option grants, vesting schedules, exercises, expirations, and terminations
Prepare and distribute equity grant agreements and related documentation in coordination with People Operations, Legal, and Finance
Maintain accurate, up to date records in the equity management system and ensure ongoing reconciliation with HRIS data
Process employee stock option exercises and support employees through the exercise workflow, including timelines, documentation, and system steps
Monitor vesting schedules and key equity milestones, including post termination exercise windows, and proactively flag upcoming deadlines
Serve as a primary point of contact for employee questions related to equity administration, vesting mechanics, and equity processes, while clearly communicating where tax or legal advice is required
Support equity related reporting and data preparation for audits, valuations, and required filings
Coordinate with Legal and Finance to ensure equity actions align with plan documents, approvals, and compliance requirements
Partner closely with the Manager, Total Rewards to ensure payroll and equity operations align with compensation philosophy, policies, and governance
Work with People Tech to maintain clean integrations between HRIS, payroll, and equity systems and to troubleshoot data or system issues
Document and maintain clear SOPs for payroll and equity workflows to support scalability, continuity, and audit readiness
Identify opportunities to improve accuracy, efficiency, and reliability across payroll and equity operations through process improvements or automation
Maintain strict confidentiality, data integrity, and professionalism when handling sensitive employee and company information
Qualification
Required
4 years or more of experience in payroll administration, equity administration, or a finance role with meaningful ownership of one or both areas
Experience operating in a high-growth, fast paced, evolving environment
Hands on experience running payroll for both hourly and salaried employees
Working knowledge of equity compensation concepts including stock options, vesting schedules, grant agreements, and basic tax considerations
Strong attention to detail and comfort working with sensitive financial and personal data
Ability to manage recurring cycles, deadlines, and ad hoc requests without sacrificing accuracy
Clear written and verbal communication skills with a service oriented mindset
Ability to partner effectively with Finance, Legal, People Ops, and leadership
Preferred
Experience with Rippling payroll is strongly preferred but not required
Experience administering payroll and equity in a high growth or startup environment
Hands on experience with Rippling, Carta, Shareworks, or similar payroll and equity platforms
Experience supporting payroll, equity, or compensation audits
Strong spreadsheet and reconciliation skills
Demonstrated ability to improve operational processes and documentation
A calm, trustworthy presence when handling complex or sensitive employee questions
Company
Hadrian
Hadrian builds AI-powered automated factories that manufacture precision parts for defense, aerospace, and space industries.
201-500 employees
Funding
Current Stage
Growth StageTotal Funding
$607.81MKey Investors
T. Rowe PriceMorgan Stanley
2026-01-09Series Unknown· $131.31M
2025-07-17Series C· $110M
2025-07-17Debt Financing· $150M
Leadership Team
Chris Power
Founder & CEO
West Owens
Chief Financial Officer
Recent News
Washington Technology
2026-01-14
2026-01-11
Company data provided by crunchbase