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Description of Business	12 Months Ended
Description of Business	Sep. 28, 2014
Description of Business
Description of Business	1. Description of Business We are a leading provider of consulting, engineering, technical services, program management, and construction management services that focus on addressing fundamental needs for water, environment, infrastructure, resource management and energy. We typically begin at the earliest stage of a project, leading with science, identifying technical solutions to problems and developing execution plans tailored to our clients' needs and resources. Our solutions may span the entire life cycle of consulting and engineering projects and include applied science, research and development, information technology, engineering, design, construction management, and operations and maintenance.