Sr. Human Resources Generalist

TransDigm Group Inc.•Buena Park, CA

2d•$85,000 - $95,000•Onsite

About The Position

Leach International Corporation designs and manufacturers relays, electronic control devices, and power systems primarily for the aerospace and defense industry. We welcome people who share our determination and high standards to join us in doing work that moves the world forward. Leach is known for design excellence and commitment to quality and reliability since 1919. This 100-year legacy includes the invention of the electrical relay for aircraft systems which has supported the development of the world’s aircraft. With hybrid and all electric vehicles driving the future, Leach’s products are more important than ever. Our equipment and components are used on thousands of aerospace, military, rail and high-end industrial applications worldwide, in the most severe environments when reliable and performance are mission critical. Job Overview Title: Sr. Human Resources Generalist Location: Buena Park, California Type: Full-Time Onsite Salary Range: $85,000 - $95,000 (based on experience) Job Summary The Senior HR Generalist is a key member of the Leach human resources team, responsible for delivering both strategic and hands-on support across HR and payroll functions. This role is split evenly between payroll administration and HR generalist responsibilities, ensuring accurate payroll processing while driving HR initiatives that support employee engagement, compliance, and organizational effectiveness. The ideal candidate brings strong technical payroll expertise, broad HR knowledge, and the ability to operate with a high level of independence and judgment.

Requirements

Bachelor’s degree in Human Resources, Business Administration, or related field is required.
4-7 years of progressive experience in human resources, including payroll administration.
Strong knowledge of California labor laws, including wage & hour, leaves of absence, final pay, and local ordinances.
Proficiency with HRIS and payroll systems (e.g., ADP, PeopleSoft, Paylocity, UKG, Workday).
High level of accuracy, confidentiality, and attention to detail.
Strong communication, problem-solving, and relationship-building skills.
Ability to manage multiple priorities and work independently
HR or payroll certification (PHR, SHRM, or CPP)
Must be authorized to work in the U.S.
Eligible for any required authorization from the U.S. Government for Export Control Regulations.

Responsibilities

Lead end-to-end payroll processing for all employees, ensuring accuracy, timeliness, and compliance with federal, state, and local regulations.
Maintain and audit payroll records, including new hires, terminations, pay adjustments, and deductions.
Review and reconcile timekeeping data for compliance with California requirements (meal/rest breaks, overtime, double-time, split shifts, reporting timer pay); resolve discrepancies with managers and employees.
Administer payroll-related items such as garnishments, wage verifications, bonuses, commissions, and retroactive adjustments.
Monitor changes in wage and hour laws and ensure ongoing compliance.
Serve as the subject-matter expert and primary point of contact for payroll inquiries.
Support full employee lifecycle, including recruitment, onboarding, performance management, and offboarding.
Maintain HRIS data integrity and ensure compliant personnel file documentation per California requirements.
Assist with benefits administration, open enrollment, and employee education.
Provide guidance to employees and managers on HR policies, procedures, and best practices.
Support employee relations by documenting issues, conducting preliminary investigations, and escalating appropriately.
Coordinate training programs, compliance initiatives, and employee engagement activities.
Contribute to HR policy updates, compliance audits, and continuous process improvements.
Partner with leadership on HR projects such as culture-building efforts and organizational development.