Revenue and Contract Balances (Tables)

12 Months Ended

Sep. 28, 2025

Revenue from Contract with Customer [Abstract]

Summary of revenue disaggregated by client sector and contract type

The following tables present revenue disaggregated by client sector and contract type (in thousands):

	Fiscal Year Ended
	September 28, 2025		September 29, 2024		October 1, 2023
Client Sector:
U.S. federal government (1)	$	1,718,831	$	1,675,996	$	1,387,101
U.S. state and local government	789,968		613,185		607,074
U.S. commercial	899,298		909,642		869,460
International (2)	2,034,493		1,999,856		1,658,915
Total	$	5,442,590	$	5,198,679	$	4,522,550
Contract Type:
Fixed-price	$	2,365,680	$	2,016,638	$	1,643,849
Time-and-materials	2,319,766		2,337,913		2,166,671
Cost-plus	757,144		844,128		712,030
Total	$	5,442,590	$	5,198,679	$	4,522,550

(1) Includes revenue generated under U.S. federal government contracts performed outside the United States.

(2) Includes revenue generated from non-U.S. clients, primarily in Australia, Canada and the United Kingdom.

Summary of net contract assets/liabilities

Net contract assets/liabilities consisted of the following (in thousands):

	Fiscal Year Ended
	September 28, 2025		September 29, 2024
Contract assets (1)	$	138,232	$	129,678
Contract liabilities	(420,254)		(351,738)
Contract liabilities - non-current (2)	(2,628)		—
Net contract liabilities	$	(284,650)	$	(222,060)

(1) Includes $12.8 million and $7.9 million of contract retentions at fiscal 2025 and 2024 year-ends, respectively.

(2) Reported under "Other non-current liabilities" on our consolidated balance sheet as of September 28, 2025.

Summary of components of net accounts receivable

Net accounts receivable consisted of the following (in thousands):

	Fiscal Year Ended
	September 28, 2025		September 29, 2024
Billed	$	855,026	$	707,406
Unbilled	310,818		348,907
Total accounts receivable	1,165,844		1,056,313
Allowance for doubtful accounts	(6,916)		(4,852)
Total accounts receivable, net	$	1,158,928	$	1,051,461

Summary of remaining performance obligation, expected timing

We expect to satisfy our RUPO as of fiscal 2025 year-end over the following periods (in thousands):

	Amount
Within 12 months	$	2,848,652
Beyond (1)	1,252,475
Total	$	4,101,127

(1) The majority of this amount is expected to be recognized over the subsequent two-year period.