Reportable Segments

We manage our operations under two reportable segments. Our GSG reportable segment primarily includes activities with U.S. government clients (federal, state and local) and all activities with development agencies worldwide. Our CIG reportable segment primarily includes activities with U.S. commercial clients and all international activities other than work for development agencies. Additionally, we will continue to report the results of the wind-down of our non-core construction activities in the Remediation and Construction Management ("RCM") segment. The remaining backlog for RCM as of December 30, 2018 was immaterial as the related projects are substantially complete.

GSG provides consulting and engineering services primarily to U.S. government clients (federal, state and local) and development agencies worldwide. GSG supports U.S. government civilian and defense agencies with services in water, environment, infrastructure, information technology, and disaster management services. GSG also provides engineering design services for municipal and commercial clients, especially in water infrastructure, solid waste, and high-end sustainable infrastructure designs. GSG also leads our support for development agencies worldwide, especially in the United States, United Kingdom, and Australia.

CIG provides consulting and engineering services primarily to U.S. commercial clients and international clients, both commercial and government. CIG supports commercial clients across the Fortune 500, oil and gas, energy utilities, manufacturing, aerospace, and mining markets. CIG also provides infrastructure and related environmental and geotechnical services, testing, engineering and project management services to commercial and local government clients across Canada, in Asia Pacific (primarily Australia and New Zealand), as well as Brazil and Chile. CIG also provides field construction management activities in the United States and Western Canada.

Management evaluates the performance of these reportable segments based upon their respective segment operating income before the effect of amortization expense related to acquisitions, and other unallocated corporate expenses. We account for inter-segment revenues and transfers as if they were to third parties; that is, by applying a negotiated fee onto the costs of the services performed. All significant intercompany balances and transactions are eliminated in consolidation.

Reportable Segments

The following tables set forth summarize financial information regarding our reportable segments:



	Three Months Ended
	December 30, 2018			December 31, 2017
	(in thousands)
Revenue
GSG	$	411,971		$	442,772
CIG	317,793			331,513
RCM	1,453			6,807
Elimination of inter-segment revenue	(13,786		)	(21,343		)
Total revenue	$	717,431		$	759,749

Income from operations
GSG	$	37,413		$	39,125
CIG	27,099			21,294
RCM	4			(1,158		)
Corporate ⁽¹⁾	(8,805		)	(10,672		)
Total income from operations	$	55,711		$	48,589

⁽¹⁾ Includes amortization of intangibles, other costs and other income not allocable to our reportable segments.



	December 30, 2018		September 30, 2018
	(in thousands)
Total Assets
GSG	$	495,343	$	468,010
CIG	441,829		478,197
RCM	24,185		25,683
Corporate ⁽¹⁾	873,532		987,531
Total assets	$	1,834,889	$	1,959,421

⁽¹⁾ Corporate assets consist of intercompany eliminations and assets not allocated to our reportable segments including goodwill, intangible assets, deferred income taxes and certain other assets.