Human Resources Manager

Aston Carter; Stockton (CA); On-site; USD 66,000 - 90,000; Full time

Benefits offered by this job

Medical benefits

401(k) plan

Life insurance

PTO

Job summary

The Operations Human Resources Manager at Aston Carter serves as the strategic HR leader for a union manufacturing facility. This role partners closely with plant leadership and union representatives to foster a positive labor-management relationship while ensuring compliance with the CBA, company policies, and applicable labor laws.

The position covers employee relations, labor relations, workforce planning, talent management, and organizational development, with a strong presence on the

Qualifications

• Bachelor's degree in HR, business, labor relations or related field.
• 7+ years progressive HR experience.
• 3+ years in a unionized manufacturing or similar environment.
• Experience interpreting and administering CBAs.
• Experience managing grievances, arbitrations and investigations.
• Knowledge of NLRB regs, labor law, FMLA, ADA, FLSA, CA employment law.

Responsibilities

• Serve as primary HR contact for union-related matters and CBA administration.
• Lead grievance investigations and resolution with union reps.
• Participate in labor-management meetings and maintain union relations.
• Advise leaders on labor relations, discipline, and workforce practices.
• Support contract negotiations and contract administration.
• Guide managers on employee communications and conflict resolution.

Skills

Labor relations

Employee relations

HR policies

Grievance handling

Union experience

Education

Bachelor's degree in HR, Business Administration, Labor Relations, or related field

Job description

Must have experience with a union facility!

Description

Position Summary

The Operations Human Resources Manager serves as the strategic HR leader for a union manufacturing facility. This position partners closely with plant leadership and union representatives to foster a positive labor-management relationship while ensuring compliance with the collective bargaining agreement, company policies, and applicable labor laws. The Operations HR Manager is responsible for employee relations, labor relations, workforce planning, talent management, compliance, compensation administration, and organizational development. This role requires a strong presence on the production floor and the ability to balance operational objectives with employee engagement and union partnership.

Key Labor Relations Responsibilities

Labor Relations & Union Administration

• Serve as the primary HR contact for union-related matters and collective bargaining agreement administration.
• Interpret and administer the collective bargaining agreement (CBA) consistently and effectively.
• Lead grievance investigations, responses, and resolution efforts in partnership with operational leadership and union representatives.
• Participate in labor-management meetings and maintain productive working relationships with union leadership.
• Support collective bargaining negotiations, contract administration, and implementation of negotiated agreements.
• Advise leaders on labor relations matters, contract compliance, disciplinary actions, and workforce practices.
• Monitor and evaluate labor trends, employee concerns, and workplace issues to proactively address potential disputes.
• Partner with Legal and Corporate HR on labor relations strategy and employment matters.

Employee Relations

• Conduct investigations related to policy violations, employee complaints, harassment, discrimination, and workplace concerns.
• Guide managers through progressive discipline processes consistent with company policies and labor agreements.
• Coach supervisors and managers on effective employee communication, conflict resolution, and leadership practices.
• Promote employee engagement initiatives while maintaining a positive labor-management environment.

Skills

Human resources

Required

• Bachelor's degree in Human Resources, Business Administration, Labor Relations, or related field.
• 7+ years of progressive HR experience.
• 3+ years supporting a unionized manufacturing, food production, distribution, or industrial environment.
• Experience interpreting and administering collective bargaining agreements.
• Experience managing grievances, arbitrations, investigations, and labor‑management relations.
• Strong knowledge of NLRB regulations, labor law, FMLA, ADA, FLSA, and California employment law.

Preferred

• Experience supporting Teamsters, UFCW, IAM, Bakery & Confectionery, or other manufacturing labor unions.
• PHR, SPHR, SHRM‑CP, or SHRM‑SCP certification.
• Bilingual English/Spanish.
• Experience supporting facilities with 300+ employees and multiple shifts.

Experience Level

• Intermediate Leve

Job Type & Location

This is a Contract to Hire position based out of Stockton, CA.

Pay And Benefits

The pay range for this position is $48.00 - $65.00/hr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors. Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:

• Medical, dental & vision
• Critical Illness, Accident, and Hospital
• 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available
• Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• Short and long-term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a fully onsite position in Stockton,CA.

Application Deadline

This position is anticipated to close on Oct 6, 2026.

About Aston Carter

Aston Carter provides world‑class corporate talent solutions to thousands of clients across the globe. Specialized in accounting, finance, human resources, talent acquisition, procurement, supply chain and select administrative professions, we extend the capabilities of industry‑leading companies. We draw on our deep recruiting expertise and expansive network to meet the evolving needs of our clients and talent community with agility and excellence. With offices across the U.S., Canada, Asia Pacific and Europe, Aston Carter serves many of the Fortune 500. We are proud to be a ClearlyRated Best of Staffing Platinum Award winner for both client and talent service.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email [e-mail] for other accommodation options.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.