ABM Industries is a diversified facility solutions provider that delivers comprehensive maintenance, engineering, and infrastructure services to commercial, industrial, educational, aviation, and healthcare customers across multiple markets. The company generates revenues through various contract structures including monthly fixed-price arrangements, cost-plus agreements, hourly billing, and specialized services such as microgrid installation and energy savings contracts, serving over 20,000 clients with no single customer representing more than 10% of revenue. ABM competes primarily on service quality, operational efficiency, industry expertise, and integrated service capabilities, differentiating itself from regional competitors and in-house service operations through its scale and long-established client relationships.