The WARN Act protects workers, families, and communities. It mandates that employers give a 60-day notice before closing plants or conducting mass layoffs.Dear New Employee: Welcome to the City of Philadelphia and the Department of Public Health. Hiring Process Overview. The process that a Police Officer Candidate must complete before they can become a Philadelphia Police Officer involves multiple steps. Failing to receive notification without extenuating circumstances is not generally accepted as good cause. Sample Offer Letters. Top. Penn Human Resources. This document provides additional guidance in conjunction with previously published documents. Philadelphia's Requirement of Employment Policy.