The Company operates in two reportable segments: Federal Solutions and Critical Infrastructure.

The Federal Solutions segment provides advanced technical solutions to the U.S. government, delivering timely, cost-effective hardware, software and services for mission-critical projects. The segment provides advanced technologies,

supporting national security missions in cybersecurity, missile defense, and military facility modernization, logistics support, hazardous material remediation and engineering services.

The Critical Infrastructure segment provides integrated engineering and management services for complex physical and digital infrastructure around the globe. The Critical Infrastructure segment is a technology innovator focused on next generation digital systems and complex structures. Industry leading capabilities in engineering and project management allow the Company to deliver significant value to customers by employing cutting-edge technologies, improving timelines and reducing costs.

The Company defines its reportable segments based on the way the chief operating decision maker (“CODM”), currently its Chairman and Chief Executive Officer, evaluates the performance of each segment and manages the operations of the Company for purposes of allocating resources among the segments. The CODM evaluates segment operating performance using segment Revenue and segment Adjusted EBITDA attributable to Parsons Corporation.

The following table summarizes business segment revenue for the periods presented (in thousands):

	Three Months Ended
	March 31, 2020		March 31, 2019
Federal Solutions revenue	$	477,571	$	422,812
Critical Infrastructure revenue		493,422		481,593
Total revenue	$	970,993	$	904,405

The Company defines Adjusted EBITDA attributable to Parsons Corporation as Adjusted EBITDA excluding Adjusted EBITDA attributable to noncontrolling interests. The Company defines Adjusted EBITDA as net income (loss) attributable to Parsons Corporation, adjusted to include net income (loss) attributable to noncontrolling interests and to exclude interest expense (net of interest income), provision for income taxes, depreciation and amortization and certain other items that are not considered in the evaluation of ongoing operating performance. These other items include net income (loss) attributable to noncontrolling interests, asset impairment charges, income and expense recognized on litigation matters, expenses incurred in connection with acquisitions and other non-recurring transaction costs and expenses related to our prior restructuring. The following table reconciles business segment Adjusted EBITDA attributable to Parsons Corporation to Net Income attributable to Parsons Corporation for the periods presented (in thousands):

	Three Months Ended
Adjusted EBITDA attributable to Parsons Corporation	March 31, 2020			March 31, 2019
Federal Solutions	$	31,617		$	40,599
Critical Infrastructure		27,357			27,676
Adjusted EBITDA attributable to Parsons Corporation		58,974			68,275
Adjusted EBITDA attributable to noncontrolling interests		1,522			3,749
Depreciation and amortization		(32,409	)		(30,591	)
Interest expense, net		(3,794	)		(7,815	)
Income tax expense		(5,084	)		(1,886	)
Equity-based compensation income (expense)		7,721			(3,850	)
Transaction-related costs (a)		(12,011	)		(9,355	)
Restructuring income (expense) (b)		33			(2,218	)
Other (c)		(581	)		(2,923	)
Net income including noncontrolling interests		14,371			13,386
Net income attributable to noncontrolling interests		1,398			3,645
Net income attributable to Parsons Corporation	$	12,973		$	9,741

Asset information by segment is not a key measure of performance used by the CODM.

The following tables present revenues and property and equipment, net by geographic area (in thousands):

	Three Months Ended
	March 31, 2020		March 31, 2019
Revenue
North America	$	797,946	$	731,030
Middle East		168,859		167,952
Rest of World		4,188		5,423
Total Revenue	$	970,993	$	904,405

The geographic location of revenue is determined by the location of the customer. The prior reporting of revenue by geographic location has been conformed to the current presentation.

	March 31, 2020		December 31, 2019
Property and Equipment, Net
North America	$	119,658	$	117,606
Middle East		4,942		5,145
Total Property and Equipment, Net	$	124,600	$	122,751

North America includes revenue in the United States for the three months ended March 31, 2020 and March 31, 2019 of $735.8 million and $669.2 million, respectively. North America property and equipment, net includes $112.5 million and $109.9 million of property and equipment, net in the United States at March 31, 2020 and December 31, 2019, respectively.

	Three Months Ended
	March 31, 2020		March 31, 2019
Revenue
Space & Geospatial Solutions	$	51,288	$	45,757
Cyber & Intelligence		98,882		72,549
Engineered Systems		172,832		145,618
Missile Defense & C5ISR		154,569		158,888
Federal Solutions revenues		477,571		422,812
Mobility Solutions		391,521		373,980
Connected Communities		101,901		107,613
Critical Infrastructure revenues		493,422		481,593
Total Revenue	$	970,993	$	904,405

Effective January 1, 2020, the Company made changes to its business lines as described below. The prior year information in the table above has been reclassified to conform to the business line changes.

As a result of the acquisitions of Polaris Alpha, OGSystems and QRC, we realigned the five business lines within our Federal Solutions segment into four business lines. We consolidated all space and geospatial programs from the former Geospatial Solutions, Defense and Cyber & Intelligence markets into a new Space & Geospatial Solutions business line to increase focus on the critical, evolving space market. This new business line better aligns capabilities and customers to drive growth and performance execution through improved agile, end-to-end solutions and dedicated customer focus.

Further, we re-named our Defense business line to Missile Defense & C5ISR. We moved our Missions Solutions business line into our Missile Defense & C5ISR, Engineered Systems and Cyber & Intelligence business lines, for better customer and capability alignment. These changes were the next logical step in our acquisition integration process, to optimize performance delivery and growth.

We re-aligned our Critical Infrastructure segment from three markets to two markets. Industrial is now a part of Mobility Solutions and we moved all Middle East business into Mobility Solutions as well. We believe this will drive improved synergies among like-markets and increased collaboration in areas such as program and engineering management, civil and structural and water/wastewater treatment. We also moved Aviation to Connected Communities and consolidated the civil portion of rail and transit with the systems portion of rail and transit into a consolidated sub-market within Connected Communities to focus on growth in these critical market segments. In each, we are pursuing systems, software and hardware product advanced technology opportunities.