Human Resource Senior Manager

Human Resource Senior Manager

At Gerdau, we empower our people to grow, thrive, and make a difference—together. With a culture built on trust and teamwork, we offer meaningful work, continuous development, and opportunities to shape your future. We invite you to come work with us, where your contributions are valued, your voice is heard, and your career is forged with purpose.

Multi-site | Strategic HR Leadership | Labor Relations Focus

At GSN, we help build the future and we’re looking for a strategic and influential HR leader to join our team as a Senior Manager, Human Resources. This is an exciting and high-impact opportunity to influence business performance, strengthen leadership capability, and build scalable people strategies that support growth. In this role, you’ll partner directly with senior leadership to shape workforce strategy, lead labor and employee relations, and drive talent initiatives across a complex, multi-site environment.

You will be a key leader in driving our organizational and cultural transformation.

• Partner with senior leaders to develop and execute HR strategies aligned to business goals
• Lead labor relations activities, including union negotiations, contract management, and complex issue resolution
• Drive talent strategy: workforce planning, performance management, succession planning, and labor cost optimization
• Ensure compliance, governance, and consistency across HR policies and practices
• Collaborate cross-functionally to enhance organizational design, productivity, and engagement
• Organizational Transformation Support:
  Lead HR work streams for restructuring, growth initiatives, mergers & acquisitions
• Performance Monitoring and Continuous Improvement:
  Track HR metrics and drive improvements in processes, efficiency and outcomes

• Strong expertise across labor relations, employee relations, and talent management
• Proven ability to operate in multi-site, complex environments
• Solid business and data acumen—you use insights to influence decisions and outcomes
• Deep knowledge of compliance, risk management, and labor laws

• Strategic thinker who can influence and advise senior stakeholders
• Experienced people leader who develops teams and coaches leaders
• Confident communicator who can navigate complex, sensitive situations

• Bachelor’s degree in HR, Business, or related field
• 8–12+ years of progressive HR experience
• 5+ years of leadership experience
• Union negotiation experience required

• Multi-site manufacturing experience; labor relations expertise; strong leadership skills
• Master's degree in Human Resources, or a related field
• Professional certifications such as SHRM or HRCI

You’ll have the opportunity to shape the people strategy of a dynamic organization, make a visible impact at the leadership level, and help build a high-performing, engaged workforce.

Gerdau believes in equal employment opportunity related to all employees and applicants for employment. It is the policy of Gerdau that there will be no discrimination against any employee or applicant for employment on the basis of race, religion, color, national origin, citizenship, marital status, sex, age, sexual orientation, genetic information, gender identity, veteran status, disability, or other legally protected status.

All external applicants must be legally eligible to immediately work in the country of hire without current or future sponsorship.

If you are vision-impaired or have some other disability under the Americans with Disabilities Act / Accessible Canada Act or a similar law, and you wish to discuss potential accommodations related to applying for employment at Gerdau, please contact our Talent Acquisition Team at  

Nearest Major Market:
Jackson Michigan
Nearest Secondary Market:
Ann Arbor