Employee Relations Manager

Mammoth Distribution•Los Angeles, CA

2d•$110,000 - $120,000•Hybrid

About The Position

Mammoth Distribution is hiring a full-time Employee Relations Manager in North Hollywood, California. The role owns employee relations, workplace investigations, performance management, and manager coaching across Operations teams, including Production, Manufacturing, Facilities, Lab, Quality Control, Inventory, Distribution, and Transportation. It also leads companywide culture initiatives, events, and recognition programs. The position reports to the Chief Human Resources Officer and works on-site four days per week and remotely one day per week, Monday through Friday. The manager leads thorough, defensible investigations; advises and coaches managers on performance and conduct issues; oversees performance improvement plans and corrective action; tracks employee relations trends; and partners with Operations leaders on talent and organizational effectiveness. The role also plans and delivers manager training and coordinates culture and engagement programs, including associated budgets, logistics, and vendors.

Requirements

At least 5 years of HR experience, including at least 3 years focused on employee relations for hourly workforces.
Experience leading and documenting workplace investigations end to end.
Employee relations experience in California.
Experience guiding managers through PIPs, corrective action, and terminations.
Working knowledge of federal employment laws, including Title VII, ADA, ADEA, FMLA, FLSA, and NLRA, and California employment laws and requirements, including FEHA, CFRA, harassment training, and final pay.
Understanding of investigation standards, including preponderance of evidence, credibility factors, and retaliation prevention.
Precise, consistent written documentation and strong case management skills across multiple open matters.
Ability to remain neutral and credible with all parties, deliver candid feedback, and influence without direct authority.
Experience facilitating training and leading groups.
Working proficiency with HRIS, case-tracking tools, and basic reporting.
Bachelor's degree or equivalent work experience.

Nice To Haves

Degree in human resources, organizational psychology, or a related field.
SHRM-CP/SCP, PHR/SPHR, or workplace investigator training such as AWI.
Experience planning and delivering employee engagement or culture programs.
Experience in cannabis or another regulated or high-growth CPG environment.

Responsibilities

Lead intake, planning, and investigation of workplace complaints in Operations, including harassment, discrimination, retaliation, and misconduct.
Interview complainants, respondents, and witnesses; make credibility determinations; and prepare clear, defensible findings reports and closure letters.
Maintain a complete case log and supporting documentation for every employee relations matter.
Promptly escalate matters with potential legal exposure to the CHRO, summarizing facts and risks.
Advise Operations managers on documentation, performance improvement plans, final warnings, and termination readiness.
Prepare and review PIPs, warning documents, and termination risk reviews before action is taken.
Coach managers through difficult conversations and help them address performance and conduct issues directly.
Build and deliver manager training on feedback, documentation, and accountability.
Track employee relations trends across Operations, flag patterns by team or manager, and deliver quarterly trend reports to the CHRO.
Partner with Operations leaders on talent and organizational effectiveness reviews.
Plan and execute companywide culture initiatives, events, and recognition programs, including budgets, logistics, and vendors.
Partner with leaders across departments to drive employee participation and engagement.