Human Resources Manager

Aston Carter; Stockton (CA); On-site; USD 100,000 - 136,000; Full time

Benefits offered by this job

Medical, dental & vision

401(k) retirement plan

Paid time off

Job summary

Aston Carter seeks an Operations Human Resources Manager to lead union relations at a Stockton, CA manufacturing site. You will partner with plant leadership and union stewards to balance production needs with fair labor practices on the floor.

You will oversee employee and labor relations, workforce planning, and compliance under the collective bargaining agreement, while coaching leaders and driving engagement and continuous improvement.

Qualifications

• 7+ years of progressive HR experience.
• 3+ years supporting unionized manufacturing environments.
• Experience interpreting and administering collective bargaining agreements.
• Knowledge of NLRB regulations and CA employment law.
• Experience managing grievances, investigations, and labor relations.
• Bilingual English/Spanish is a plus.
• Bachelor's degree in HR or related field.

Responsibilities

• Serve as the primary HR contact for union-related matters and CBA administration.
• Interpret and administer the collective bargaining agreement consistently and effectively.
• Lead grievance investigations, responses, and resolutions with operations and union.
• Participate in labor-management meetings and maintain productive relationships with union leadership.
• Support collective bargaining negotiations, contract administration, and implementation.
• Advise leaders on labor relations, contract compliance, and workforce practices.
• Monitor labor trends and address workplace concerns to prevent disputes.
• Partner with Legal and Corporate HR on labor relations strategy.
• Conduct investigations related to policy violations, complaints, harassment, or discrimination.
• Coach managers on communication, conflict resolution, and leadership.
• Promote employee engagement and positive labor-management environment.
• Support workforce planning to align staffing with operational needs.
• Contribute to change management and organizational improvement initiatives.
• Ensure compliance with employment laws and internal HR policies.

Skills

Union experience

Labor relations

Employee relations

Workforce planning

Compliance

Grievances investigations

Labor law (CA)

Leadership coaching

Conflict resolution

Change management

Education

Bachelor's degree in HR / Business / Labor Relations

PHR / SPHR / SHRM certification preferred

Job description

Job Description

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

MUST HAVE UNION EXPERIENCE!

Job Title: Human Resources Manager

Job Description

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

Responsibilities

• Serve as the primary HR contact for union-related matters and collective bargaining agreement administration.
• Interpret and administer the collective bargaining agreement consistently and effectively across the facility.
• Lead grievance investigations, responses, and resolution efforts in partnership with operational leadership and union representatives.
• Participate in labor-management meetings and maintain productive, collaborative 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 identify and address potential disputes.
• Partner with Legal and Corporate HR on labor relations strategy and employment matters.
• 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 requirements.
• Coach supervisors and managers on effective employee communication, conflict resolution, and leadership practices.
• Promote employee engagement initiatives while maintaining a positive labor-management environment.
• Support workforce planning efforts to ensure appropriate staffing levels and alignment with operational needs.
• Contribute to change management and continuous improvement initiatives that enhance organizational effectiveness.
• Ensure ongoing compliance with employment laws, regulations, and internal HR policies.

Essential Skills

• 7+ years of progressive human resources experience.
• 3+ years of HR experience supporting a unionized manufacturing, food production, distribution, or industrial environment.
• Bachelor's degree in Human Resources, Business Administration, Labor Relations, or a related field.
• Demonstrated experience interpreting and administering collective bargaining agreements.
• Proven experience managing grievances, arbitrations, investigations, and labor-management relations.
• Strong knowledge of NLRB regulations and labor law.
• Strong knowledge of FMLA, ADA, FLSA, and California employment law.
• Expertise in human resources and labor relations in a unionized setting.
• Proficiency in collective bargaining and grievance management processes.
• Solid understanding of employment law compliance and employee relations best practices.
• Ability to provide leadership coaching to supervisors and managers.
• Strong conflict resolution skills and the ability to manage complex labor issues.
• Capability to drive change management and continuous improvement initiatives.

Additional Skills & Qualifications

• PHR, SPHR, SHRM-CP, or SHRM-SCP certification is preferred.
• Experience supporting Teamsters, UFCW, Bakery & Confectionery, or other manufacturing labor unions is preferred.
• Bilingual English/Spanish language skills are highly beneficial.
• Experience supporting facilities with 300+ employees and multiple shifts is preferred.
• Demonstrated ability to work effectively with both plant leadership and union representatives.
• Strong interpersonal and communication skills to build trust and credibility across all levels of the organization.
• Ability to influence and guide leaders on labor relations strategy and workforce practices.

Work Environment

This role is based in a unionized manufacturing facility and requires a strong presence on the production floor, working closely with plant operations and union representatives. The standard schedule is Monday through Friday, approximately 8:00 a.m. to 4:30 p.m., with regular overtime as business needs require. During peak seasons, the Human Resources Manager will work six days per week for several weeks in the month to support increased operational demands and labor relations activities. The environment involves multiple shifts and a large workforce, requiring frequent on-site interaction, timely issue resolution, and active participation in labor-management meetings.

Job Type & Location

This is a Permanent 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 19, 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.