EXHIBIT 99.1

FOR IMMEDIATE RELEASE

NASDAQ: AMSY

Investor Relations Contact:
Ronald Schillereff
703-267-5140
ronald.schillereff@ams.com

Media Relations Contact:
Anne Burt
703-267-8142
anne.burt@ams.com

AMS REPORTS Q1 2003 RESULTS
Meets Analysts’ Earnings Estimates

FAIRFAX, Va, April 22, 2003 – American Management Systems, Incorporated (NASDAQ: AMSY), a global business and IT consulting firm, today announced first quarter 2003 earnings of $6.3 million ($0.15 per diluted share) compared to $10.7 million, ($0.25 per diluted share) and $8.0 million ($0.19 per diluted share) in the first and fourth quarters of 2002, respectively.

Revenues for the first quarter 2003 were $227.0 million, compared with $251.4 million and $236.1 million for the first and fourth quarters in 2002, respectively. Approximately $4.8 million, or 53%, of the decline in revenues in the first quarter 2003 over the fourth quarter of 2002 was attributable to the sale of AMS’s Global Utilities practice in December 2002 as part of its strategy to divest non-core operations.

“We are pleased that we met guidance on earnings and EPS and that key operating metrics, such as utilization rates, are stable. However, macroeconomic and competitive conditions continue to be challenging,” Alfred T. Mockett, Chairman and CEO, stated. “We have taken and continue to take actions to aggressively address our costs while investing in business development and other programs that position us for future industry growth. Further, we will continue the previously announced stock repurchase program, which we began in March 2003, based on our belief that AMS’s stock is undervalued,” he concluded.

Conference Call
AMS will hold a conference call to review first quarter results at 5:00 p.m. Eastern Time on April 22, 2003 that will be accessible by dialing 913-981-5507. An audio replay of the call will be available from 8:00 p.m., April 22, 2003 through 12:00 midnight, April 29, 2003 by dialing 719-457-0820 and entering pass code 783074. The call may also be accessed via a live Webcast on the AMS Website at ams.com. The Webcast will be available for replay through April 21, 2004.

About AMS
AMS is a global business and IT consulting firm whose customers include 44 state, local and provincial governments, a majority of federal agencies, and hundreds of companies in the Fortune 500. With deep industry experience and technical know-how in all levels of government and throughout the private sector, the company delivers results that measurably improve business performance and the relationship between an organization and its customers. Founded in 1970, AMS is headquartered in Fairfax, Va. with 50 offices worldwide. The company is traded on the Nasdaq National Market under the symbol AMSY. For detailed information about AMS, visit ams.com.

# # #

This release may contain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on management’s current expectations and are subject to risks, uncertainty and changes in circumstances. Actual results may vary materially from the expectations contained in the forward-looking statements. All statements contained in this release that are not clearly historical in nature are forward-looking, and the words “anticipate,” “believe,” “expect,” “estimate,” “intends” and similar expressions are generally intended to identify forward-looking statements. The following factors, among others, could cause actual results to differ materially from those described in the forward-looking statements: risks in project delivery and staffing, risk of revenues not being realized when expected, risk of increased competition in the markets, and the effects of economic uncertainty on client expenditures as well as other factors described in AMS’s Annual Report on Form 10-K for the year ended 2002. The company specifically disclaims any obligation to update these forward-looking statements. These forward-looking statements should not be relied upon as representing the company’s (estimates or) views as of any subsequent date.

American Management Systems, Incorporated
CONSOLIDATED CONDENSED INCOME STATEMENTS
Unaudited
(In thousands, except per share data)

		For the Quarter
		Ended March 31,
		2003			2002
REVENUES		$	226,972		$	251,430
EXPENSES(1):
	Cost of Revenues		135,047			147,587
	Selling, General and Administrative		77,582			79,164
	Research and Development		3,330			5,958
INCOME FROM OPERATIONS			11,013			18,721
OTHER (INCOME) EXPENSE, NET:
	Interest Expense		509			797
	Other Income		(103	)		(249	)
			406			548
INCOME BEFORE INCOME TAXES			10,607			18,173
INCOME TAXES			4,349			7,451
NET INCOME		$	6,258		$	10,722
WEIGHTED AVERAGE SHARES OUTSTANDING			42,362			41,780
BASIC EARNINGS PER SHARE		$	0.15		$	0.26
WEIGHTED AVERAGE SHARES AND EQUIVALENTS			42,622			42,373
DILUTED EARNINGS PER SHARE		$	0.15		$	0.25

¹ Certain amounts from prior year have been reclassified for comparative purposes

1

American Management Systems, Incorporated
CONSOLIDATED REVENUES BY MARKET
(In thousands)

	For the Quarter				For the Quarter
	Ended March 31,				Ended December 31,
	2003		2002		2002		2001
Federal Government Agencies	$	85,923	$	83,675	$	88,524	$	78,156
State and Local Governments and Education		61,382		71,525		62,560		71,911
Communications, Media and Entertainment		42,597		53,202		41,438		64,623
Financial Services Institutions		30,268		30,780		31,631		30,355
Other Corporate Clients		6,802		12,248		11,935		14,886
Total Revenues	$	226,972	$	251,430	$	236,088	$	259,931

American Management Systems, Incorporated
CONSOLIDATED CONDENSED BALANCE SHEETS
(In thousands)

				3/31/2003
	ASSETS			(Unaudited)		12/31/2002
CURRENT ASSETS:
	Cash and Cash Equivalents			$	115,266	$	136,191
	Accounts Receivable, Net				219,903		212,098
	Prepaid Expenses and Other Current Assets				34,704		35,126
		Total Current Assets			369,873		383,415
NONCURRENT ASSETS:
	Property and Equipment (Net of Accumulated Depreciation and Amortization of $46,318 and $44,751)				23,874		24,518
	Purchased and Developed Computer Software (Net of Accumulated Amortization of $144,798 and $136,591)				109,637		90,797
	Goodwill, Net				24,331		24,331
	Cash Value of Life Insurance				23,214		29,830
	Other Assets				54,375		69,605
			Total Noncurrent Assets		235,431		239,081
TOTAL ASSETS				$	605,304	$	622,496

American Management Systems, Incorporated
CONSOLIDATED CONDENSED BALANCE SHEETS — CONTINUED
(In thousands, except share data)

			3/31/2003
	LIABILITIES AND STOCKHOLDERS’ EQUITY		(Unaudited)			12/31/2002
CURRENT LIABILITIES:
	Accounts Payable		$	14,674		$	17,118
	Accrued Compensation and Related Items			36,542			52,674
	Deferred Revenues			29,118			26,115
	Accrued Liabilities			12,653			14,592
	Accrued Restructuring Charge			5,031			7,988
	Income Taxes Payable			409			1,061
	Deferred Income Taxes			18,304			17,159
		Total Current Liabilities		116,731			136,707
NONCURRENT LIABILITIES:
	Deferred Compensation and Other			30,839			36,364
	Deferred Income Taxes			21,472			20,044
	Accrued Restructuring Charge			7,973			9,356
		Total Noncurrent Liabilities		60,284			65,764
TOTAL LIABILITIES				177,015			202,471
STOCKHOLDERS’ EQUITY:
	Preferred Stock ($0.10 Par Value; 4,000,000 Shares Authorized, None Issued or Outstanding)			—			—
	Common Stock ($0.01 Par Value; 200,000,000 Shares Authorized, 51,057,214 and 51,057,214 Issued and 42,249,988 and 42,324,218 Outstanding)			510			510
	Capital in Excess of Par Value			81,059			80,309
	Unearned Compensation			(1,676	)		(2,146	)
	Retained Earnings			391,321			385,063
	Accumulated Other Comprehensive Loss			(12,150	)		(14,915	)
	Treasury Stock, at Cost (8,807,226 and 8,732,996 Shares)			(30,775	)		(28,796	)
		Total Stockholders’ Equity		428,289			420,025
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY			$	605,304		$	622,496

American Management Systems, Incorporated
CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
Unaudited
(In thousands)

			For the Quarter
			Ended March 31,
			2003			2002
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income			$	6,258			$	10,722
Adjustments to Reconcile Net Income to Net Cash (Used in) Provided by Operating Activities
	Depreciation			1,737				1,929
	Amortization			8,094				7,537
	Stock Compensation Expense			383				933
	Deferred Income Taxes			2,718				2,768
	Increase in Cash Surrender Value of Life Insurance			(433	)			(360	)
	Loss on Disposal of Assets			8				77
	Changes in Assets and Liabilities:
		(Increase) Decrease in Accounts Receivable		(5,913	)			27,651
		Decrease (Increase) in Prepaid Expenses and Other Current Assets		773				(2,164	)
		Decrease (Increase) in Other Assets		1,617				(2,985	)
		Decrease in Accounts Payable and Other Accrued Liabilities		(5,078	)			(5,729	)
		Decrease in Accrued Compensation and Related Items		(21,974	)			(17,250	)
		Increase (Decrease) in Deferred Revenue		2,966				(963	)
		Decrease in Accrued Restructuring Charge		(4,341	)			(7,734	)
		Decrease in Income Taxes Payable		(671	)			(13,149	)
Net Cash (Used in) Provided by Operating Activities				(13,856	)			1,283
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of Property and Equipment				(1,038	)			(182	)
Purchase and Development of Computer Software				(13,288	)			(4,638	)
Other Assets				6,644				(4,060	)
Net Cash Used in Investing Activities				(7,682	)			(8,880	)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Common Stock Options Exercised and Employee Stock Purchase Plan				1,206				3,352
Payments to Acquire Treasury Stock				(2,341	)			(286	)
Net Cash (Used in) Provided by Financing Activities				(1,135	)			3,066
Effect of Exchange Rate Changes on Cash				1,748				(628	)
NET DECREASE IN CASH AND CASH EQUIVALENTS				(20,925	)			(5,159	)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD				136,191				53,347
CASH AND CASH EQUIVALENTS AT END OF PERIOD			$	115,266			$	48,188
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Exchange of Investment for Intangible Assets, Net of Cash			$	16,266			$	—
Issuance of Treasury Stock for Stock Options Exercised, Employee Stock Purchase Plan, and Restricted Stock			$	217			$	1,679