FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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 *   Floerke Gregory Scott 2. Date of Event Requiring Statement (Month/Day/Year) 01/03/2005 3. Issuer Name and Ticker or Trading Symbol MASTEC INC [MTZ] (Last) (First) (Middle) 800 S DOUGLAS ROAD, 12TH FLOOR 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Operations Officer 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) CORAL GABLES, FL 33134 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Incentive Stock Option (right to buy) (1)	  (2)	01/03/2015	Common Stock	10,277	$ 9.73	D	Â
Incentive Stock Option (right to buy) (1)	  (3)	01/22/2014	Common Stock	20,040	$ 14.97	D	Â
Non-Qualified Stock Option (right to buy) (1)	  (4)	09/16/2014	Common Stock	40,000	$ 5.15	D	Â
Non-Qualified Stock Option (right to buy) (1)	  (2)	01/03/2015	Common Stock	29,723	$ 9.73	D	Â
Non-Qualified Stock Option (right to buy) (1)	  (3)	01/22/2014	Common Stock	14,960	$ 14.97	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Floerke Gregory Scott 800 S DOUGLAS ROAD 12TH FLOOR CORAL GABLES, FL 33134	Â	Â	  Chief Operations Officer	Â

Signatures

By: /s/ Michael G Nearing For: Gregory S Floerke		01/11/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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).
(1)	Stock Option granted pursuant to the 2003 Employee Incentive Plan for no cash consideration.
(2)	Exempt stock option grant that vests over three years. First two years vesting is 33%. Third year vesting is 34%. Vesting begins twelve months after date of grant (01/03/2005).
(3)	Exempt stock option grant that vests over three years. First two years vesting is 33%. Third year vesting is 34%. Vesting begins twelve months after date of grant (01-22-03).
(4)	Exempt stock option grant that vests over three years. First two years vesting is 33%. Third year vesting is 34%. Vesting begins twelve months after date of grant (09/16/2004).

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