Owns Mosaic’s health, welfare, and 401(k) programs, including strategy, renewals, open enrollment, administration, vendor management, compliance, audits, reporting, and employee support. Manages self-funded medical benefits, retirement plan operations, Paycom configuration, carrier feeds, COBRA, ACA reporting, plan audits, fiduciary committee support, and cross-functional coordination with Payroll, Employee Relations, Finance, and Onboarding.