Find & Apply For Human Resources Manager Jobs in Diamond Bar, California

We are looking for an experienced and driven HR Supervisor to lead our human resources operations and serve as a strategic partner to our leadership team. In this role, you will oversee the full spectrum of HR functions — from talent acquisition and onboarding to compliance, performance management, and payroll administration. You will play a hands-on role in building a strong, inclusive workplace culture while ensuring our people practices align with business goals. This is an in-person, full-time position ideal for an HR professional who thrives in a dynamic, fast-paced environment — particularly one with experience in industrial or manufacturing settings and familiarity with OSHA regulations.

Key responsibilities include:

Leading end-to-end recruitment and onboarding processes Ensuring compliance with federal and state employment labor laws Managing employee relations, performance reviews, and disciplinary processes Administering payroll and maintaining accurate HR records via Dayforce. Delivering training on HR policies, safety standards, and workplace conduct Driving change management initiatives that support organizational growth Partnering with department heads on workforce planning and staffing strategies

HR Supervisor Compensation & Benefits:

Salary Range:

$85,000 - $100,000 per year, commensurate with experience. 401(k) with employer matching Medical, dental, and vision insurance Life insurance coverage Paid time off (PTO) Retirement plan

HR Supervisor Job Requirements:

Bachelor's degree in Human Resources Management, Business Administration, or a related field (required) HR certification such as SHRM-CP, SHRM-SCP, or PHR is a strong plus Minimum 3-5 years of progressive HR experience, with at least 1-2 years in a supervisory or lead capacity Proven track record in talent acquisition, employee relations, and performance management Hands-on experience with payroll processing and administration Demonstrated knowledge of employment labor laws and OSHA regulations Experience supporting change management initiatives in a growing organization Professional proficiency in both English and Mandarin is required, as this role involves regular communication with our Mandarin-speaking workforce and stakeholders Proficiency in HR information systems, particularly Dayforce or comparable platforms Strong data management and HR reporting capabilities Competence in Microsoft Office Suite (Word, Excel, Outlook) Excellent verbal and written communication skills in both English and Mandarin Strong interpersonal skills with the ability to build trust at all levels of the organization High level of discretion and professionalism when handling sensitive matters Detail-oriented with strong organizational and problem-solving abilities A proactive, people-first mindset with a commitment to diversity and inclusion