CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 26, 2022	Dec. 26, 2021
Current assets:
Cash and cash equivalents	$ 142.4	$ 349.4
Accounts receivable, net	100.6	93.9
Unbilled receivables, net	214.4	190.8
Inventoried costs	118.2	91.7
Prepaid expenses	12.2	9.8
Other current assets	36.5	22.5
Total current assets	624.3	758.1
Property, plant and equipment, net	212.2	168.3
Operating lease right-of-use assets	38.1	38.5
Goodwill	551.9	493.9
Intangible assets, net	64.9	43.2
Other assets	91.9	87.5
Total assets	1,583.3	1,589.5
Current liabilities:
Accounts payable	58.2	50.4
Accrued expenses	36.0	27.2
Accrued compensation	50.1	47.3
Accrued interest	0.3	1.5
Billings in excess of costs and earnings on uncompleted contracts	59.2	58.1
Current portion of operating lease liabilities	10.6	10.1
Other current liabilities	12.5	25.7
Current liabilities of discontinued operations	0.9	0.8
Total current liabilities	227.8	221.1
Long-term debt, net of current portion	293.8	296.7
Operating lease liabilities, net of current portion	31.5	32.7
Other long-term liabilities	82.9	76.2
Long-term liabilities of discontinued operations	1.4	2.5
Total liabilities	637.4	629.2
Commitments and contingencies
Redeemable noncontrolling interest	7.8	15.2
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at June 26, 2022 and December 26, 2021	0.0	0.0
Common stock, $0.001 par value, 195,000,000 shares authorized; 125,627,337 and 123,987,424 shares issued and outstanding at June 26, 2022 and December 26, 2021, respectively	0.0	0.0
Additional paid-in capital	1,593.1	1,578.9
Accumulated other comprehensive income	0.0	0.6
Accumulated deficit	(655.0)	(634.4)
Total stockholders’ equity	938.1	945.1
Total liabilities and stockholders’ equity	$ 1,583.3	$ 1,589.5