Sr. Manager, Payroll and Stock Administration Job at Hadrian Automation (Los Angeles)

Job Description

At Hadrian, accuracy, trust, and operational rigor are foundational. Payroll and equity touch every employee and require exceptional care, precision, and coordination. As we scale rapidly across locations, roles, and compensation structures, we need a dedicated owner who can ensure these critical processes run smoothly and reliably. We are hiring a Payroll and Stock Administrator to own the day to day administration of payroll and equity programs. This role sits within the People Operations team and works closely with Total Rewards, Finance, Legal, and People Tech to ensure employees are paid accurately, equity is administered correctly, and all systems and records stay clean and compliant. This role is ideal for someone who is highly detail oriented, systems minded, and comfortable operating in a fast paced, high growth environment. You will be trusted with sensitive data and play a key role in maintaining employee confidence in Hadrian’s compensation and ownership programs.

Job Responsibility

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.

Requirements

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
Experience with Rippling payroll is strongly preferred but not required
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
To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.

Nice to have

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.

What we offer

Medical, dental, vision, and life insurance plans for employees
401k
Relocation support may be provided for certain situations, based on business need
Flexible vacation policy

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Sr. Manager, Payroll and Stock Administration

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