Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
SHANFELTER AUSTIN J
   2. Issuer Name and Ticker or Trading Symbol
MASTEC INC [MTZ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
800 DOUGLAS ROAD, SUITE 800		 3. Date of Earliest Transaction (Month/Day/Year)
06/18/2007
(Street)

CORAL GABLES, FL 33134		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 06/18/2007   S   400 D $ 13.93 166,949 D  
Common Stock 06/18/2007   S   600 D $ 13.95 166,349 D  
Common Stock 06/18/2007   S   1,100 D $ 13.96 165,249 D  
Common Stock 06/18/2007   S   1,700 D $ 13.97 163,549 D  
Common Stock 06/18/2007   S   1,200 D $ 13.98 162,349 D  
Common Stock 06/18/2007   S   800 D $ 13.99 161,549 D  
Common Stock 06/18/2007   S   400 D $ 14 161,149 D  
Common Stock 06/18/2007   S   2,000 D $ 14.01 159,149 D  
Common Stock 06/18/2007   S   800 D $ 14.02 158,349 D  
Common Stock 06/18/2007   S   600 D $ 14.03 157,749 D  
Common Stock 06/18/2007   S   1,800 D $ 14.04 155,949 D  
Common Stock 06/18/2007   S   600 D $ 14.05 155,349 D  
Common Stock 06/18/2007   S   100 D $ 14.06 155,249 D  
Common Stock 06/18/2007   S   3,100 D $ 14.07 152,149 D  
Common Stock 06/18/2007   S   2,500 D $ 14.08 149,649 D  
Common Stock 06/18/2007   S   2,200 D $ 14.09 147,449 D  
Common Stock 06/18/2007   S   2,300 D $ 14.1 145,149 D  
Common Stock 06/18/2007   S   1,000 D $ 14.11 144,149 D  
Common Stock 06/18/2007   S   1,400 D $ 14.12 142,749 D  
Common Stock 06/18/2007   S   2,300 D $ 14.13 140,449 D  
Common Stock 06/18/2007   S   3,000 D $ 14.14 137,449 D  
Common Stock 06/18/2007   S   100 D $ 14.15 137,349 D  
Common Stock 06/20/2007   S   200 D $ 14.58 137,149 D  
Common Stock 06/20/2007   S   700 D $ 14.6 136,449 D  
Common Stock 06/20/2007   S   300 D $ 14.61 136,149 D  
Common Stock 06/20/2007   S   400 D $ 14.62 135,749 D  
Common Stock 06/20/2007   S   400 D $ 14.63 135,349 D  
Common Stock 06/20/2007   S   1,400 D $ 14.64 133,949 D  
Common Stock 06/20/2007   S   400 D $ 14.65 133,549 D  
Common Stock 06/20/2007   S   1,200 D $ 14.66 132,349 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SHANFELTER AUSTIN J
800 DOUGLAS ROAD
SUITE 800
CORAL GABLES, FL 33134		   X      

Signatures

 /s/ Alberto de Cardenas, Attorney-in-Fact for Austin Shanfelter   06/20/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
 
Remarks:
The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2007.
The trading plan was established to sell up to 120,000 shares and calls for the orderly sale of these shares at three ascending
limit price levels, from $13 to $17 per share. Following completion of the planned sales, and assuming all of the shares subject to
the plan are sold, the Reporting Person will still beneficially own approximately 950,000 shares. The shares will be the first sold
by the Reporting Person since his joining the Company other than 50,000 shares he sold in 1998. The plan will terminate on June 30,
2008 unless earlier terminated.

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