Tiffany Bretz
Manager, Human Resources @Republic Services
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WORK HISTORY
Manager, Human Resources @Republic Services
At Republic Services, I serve as Manager, Human Resources, leading HR strategy across multiple union and non-union divisions throughout Oregon, serving both in-person and remote employees. In this role, I partner closely with senior operations leaders and regional executives to align people strategy with business objectives, support workforce planning, and drive organizational effectiveness. I’ve aided with union contract negotiations, facilitated grievance resolution, and delivered union avoidance education for non-union leadership teams. Additionally, I’ve spearheaded initiatives in leadership development, employee engagement, and policy compliance while managing HR integration efforts during multiple acquisitions. My work is grounded in data-driven decision-making, DEI advocacy—including founding a regional Women in Leadership program—and a commitment to building scalable HR practices that support growth and operational excellence.
EDUCATION
LSU Shreveport
Master of Business Administration - MBA
University of Phoenix
Bachelor of Science - BS
ABOUT TIFFANY BRETZ
Strategic HR leader with a passion for driving organizational effectiveness, employee engagement, and operational improvement in fast-paced, multi-site environments. Known for building inclusive cultures, advancing leadership development, and aligning people strategies with business goals. Recognized for delivering results through collaboration, adaptability, and a deep commitment to both employee and stakeholder experience. Skilled in leading through complexity, championing continuous improvement, and mentoring teams toward high performance and growth. Passionate about empowering people, transforming culture, and creating workplaces where both individuals and organizations thrive. Specialties: Strategic HR Leadership, Labor Relations & Union Negotiations, Talent Development, Succession Planning, Employee Engagement, Workforce Planning, Organizational Effectiveness, Culture Transformation, Change Management, DEI Initiatives, Coaching & Mentoring, M&A Integration, Performance Management, Policy Development, HR Compliance, Cross-functional Collaboration, Project Management
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