Hello Property Managers, Asset Managers, Facility Managers, Cooling Tower Managers, Landscape Crews, Pest Management Providers, and Janitorial Contractors. Welcome to your 'perfect fit' among LEED professional credentials. You will want to become proficient in the LEED Existing Building rating systems. Like all credentials, the LEED AP O+M specialty credential requires continuing education very two years. We’ll help you get the 30 hours you need, including the 6 hours of LEED-specific.