MasTec (MTZ) S-4 Registration of securities issued in business combination transactions

Exhibit 12.1

Statement Regarding Computation of Ratio of Earnings to Fixed Charges

Ratio of Earnings to Fixed Charges	Year Ended December 31,													Nine months ended September 30, 2010
	2009		2008		2007			2006			2005
Earnings:
Net income attributable to MasTec	$	70,748	$	65,788	$	(7,328	)	$	(50,348	)	$	(14,616	)	$	52,017
Provision for income taxes		8,385		870		—			—			—			35,912
Income attributable to MasTec before income taxes		79,133		66,658		(7,328	)		(50,348	)		(14,616	)		87,929
Add:
Minority interest(1)	$	—	$	—	$	2,459		$	2,294		$	1,714		$	—
Loss from discontinued operations		—		814		13,611			90,398			35,947			—
Fixed charges		51,237		36,928		32,168			31,186			35,297			51,187
Subtotal Earnings	$	130,370	$	104,400	$	40,910		$	73,530		$	58,342		$	139,116
Less: Undistributed earnings of less-than-50% owned affiliates		—		—		119			5,772			285			—
Total Earnings	$	130,370	$	104,400	$	40,791		$	67,758		$	58,057		$	139,116
Fixed Charges:
Interest expense	$	25,944	$	17,721	$	16,135		$	14,453		$	19,463		$	22,732
Estimate of interest within rental expense		25,293		19,207		16,033			16,733			15,834			28,455
Total Fixed Charges	$	51,237	$	36,928	$	32,168		$	31,186		$	35,297		$	51,187
Ratio of Earnings to Fixed Charges		2.5x		2.8x		1.3x			2.2x			1.6x			2.7x

(1) In years prior to the adoption of SFAS 160,Non-controlling Interests in Consolidated Financial Statements, (2004-2008), other parties’ interests in less-than-100%-owned subsidiaries were accounted for as minority interest. Upon the adoption of SFAS 160 in 2009, these interests are accounted for as non-controlling interests and are excluded from net income attributable to MasTec. Therefore, no further adjustment for the non-controlling interest portion of net income is required in 2009 or 2010.