Human Resources Assistant

Marmon Holdings•Phoenix, AZ

13d

About The Position

As a part of the global industrial organization Marmon Holdings—which is backed by Berkshire Hathaway— you’ll be doing things that matter, leading at every level, and winning a better way. We’re committed to making a positive impact on the world, providing you with diverse learning and working opportunities, and fostering a culture where everyone’s empowered to be their best. Who We Are Coilmaster is a leading manufacturer of high-quality heat transfer coils, serving customers across HVAC, refrigeration, and industrial markets. We take pride in our craftsmanship, operational excellence, and commitment to our employees. At Coilmaster, our people are at the center of what we do. Our Human Resources team plays a key role in supporting a manufacturing workforce by ensuring accurate processes, strong compliance, and a positive employee experience from onboarding through day-to-day support. We value teamwork, integrity, and attention to detail, and we strive to create an environment where employees can grow and succeed. What You’ll Do As an HR Assistant, you will provide day-to-day administrative and operational support to the Human Resources function, helping ensure HR processes run smoothly and employees receive timely assistance.

Requirements

Bilingual English/Spanish required
1–3 years of administrative, HR, or payroll support experience preferred
High school diploma required; Associate or Bachelor’s degree a plus
Experience with HRIS, timekeeping, or payroll systems (ADP or Workday preferred)
Familiarity with standard HR practices and documentation
Strong organizational skills with high attention to detail
Professional verbal and written communication skills
Ability to maintain confidentiality and handle sensitive information
Comfortable learning new systems and using Microsoft Office and Teams

Nice To Haves

Manufacturing or multi-shift environment experience is a plus

Responsibilities

Coordinate and execute onboarding tasks including new hire paperwork, I-9s, badging, system logins, uniforms, and orientation setup
Assist employees with benefits enrollment questions and required documentation
Maintain accurate and compliant employee files, both digital and physical
Serve as a first point of contact for employee questions related to schedules, policies, payroll, and general HR inquiries
Process hourly payroll, including timecard review, corrections, approvals, and attendance tracking
Update employee records related to status changes, job titles, pay rates, and other HRIS data
Process employment verifications, IDs, credentials, and other HR documentation
Track attendance, leaves of absence, and required forms
Support compliance by maintaining required postings, training records, certifications, and documentation
Maintain confidentiality and adhere to company policies and recordkeeping standards
Assist with HR audits, reporting, and compliance initiatives as needed
Manage calendars, training rosters, HR inboxes, and internal communications
Order and maintain HR supplies, forms, and onboarding materials
Support front desk and receptionist duties as needed
Perform additional projects and tasks as assigned

Benefits

Comprehensive benefits package including medical, dental, and prescription coverage.
401(k) with company matching.
Hands-on experience across multiple areas of Human Resources
Exposure to payroll processing, onboarding, compliance, and employee relations
Opportunity to grow HR knowledge in a fast-paced, operational environment
A collaborative team that values accuracy, service, and continuous improvement
A role that directly impacts the employee experience from hire to day-to-day support

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