Primoris Services Corporation
Primoris Services Corp (Form: 3, Received: 03/17/2011 16:06:18)
Washington, D.C. 20549


OMB Number: 3235-0104
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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

1. Name and Address of Reporting Person *

Killgore Michael D

2. Date of Event Requiring Statement (MM/DD/YYYY)

3. Issuer Name and Ticker or Trading Symbol

Primoris Services Corp [PRIM]

(Last)        (First)        (Middle)


4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                            _____ 10% Owner
___ X ___ Officer (give title below)          _____ Other (specify below)
Exec VP, Dir Const Svcs /


DALLAS, TX 75201       

(City)              (State)              (Zip)
5. If Amendment, Date Original Filed (MM/DD/YYYY)


6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

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)
Common Stock   707034   (1) D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 4)
2. Date Exercisable and Expiration Date
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

Explanation of Responses:
( 1)  Represents shares of common stock issued to Mr. Killgore on April 12, 2010, in connection with the issuer's acquisition of James Construction Group, LLC. At the closing of the acquisition on December 18, 2009, Mr. Killgore was issued a total of 7,070.34 shares of the issuer's Series A Contingent Convertible Preferred Stock. At a special meeting of the stockholders of the issuer on April 12, 2010, the issuer's stockholders approved the conversion of Mr. Killgore's preferred shares into a total of 707,034 shares of common stock.

Reporting Owners
Reporting Owner Name / Address
Director 10% Owner Officer Other
Killgore Michael D
DALLAS, TX 75201
Exec VP, Dir Const Svcs

/s/ Peter J. Moerbeek, by power of attorney 3/17/2011
** Signature of Reporting Person Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
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Know all these presents, that the undersigned hereby constitutes and appoints Brian Pratt, Chief Executive Officer, Peter J. Moerbeek, Chief Financial Officer, John P. Schauerman, Executive Vice President, and John M. Perisich, Senior Vice President of Primoris Services Corp., a Delaware corporation (the "Company"), with full power of substitution, as the undersigned's true and lawful attorney-in-fact to:

1. prepare, execute in the undersigned's name and on the undersigned's behalf, and submit to the U.S. Securities and Exchange Commission (the "SEC") a Form ID, including amendments thereto, and any other documents necessary or appropriate to obtain codes and passwords enabling the undersigned to make electronic filings with the SEC of reports required by Section 16(a) of the Securities Exchange Act of 1934, as amended (the "Act"), Rule 13d-1 of the Act, or any other rule or regulation of the SEC;

2. execute for an on behalf of the undersigned, in the undersigned's capacity as an officer, director, or stockholder of the Company, Forms 3, 4 and 5 in accordance 3 with Section 16(a) of the Act and the rules thereunder, Schedules 13D and 13G in accordance with Rule 13d-1 of the Act, and any other forms or reports the undersigned's may be required to file in connection with the undersigned's ownership, acquisition or disposition of securities of the Company;

3. do and perform any and all acts for and on behalf of the undersigned's which may be necessary or desirable to (i) complete and execute any such Form 3, Form 4, Form 5, Schedule 13D, Schedule 13G or other forms or reports the undersigned's may be required to file in connection with the undersigned's ownership, acquisition or disposition of securities of the Company, (ii) complete and execute any amendment or amendments thereto, and (iii) timely file such forms or reports with the SEC and any stock exchange or similar authority; and

4. take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in- fact, may be of benefit to, in the best interest of, or legally required by, the undersigned's, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned's pursuant to this Power of Attorney shall be in such form and shall contain such terms as such attorney- in-fact may approve in such attorney-in-facts discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorney-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Act, Rule 13d-1 of the Act, or any other rule or regulation of the SEC;

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file reports required by the Act with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorney-in-fact.

IN WITNESS WHEREOF, the undersigned's has caused this Power of Attorney to be executed as of April 14, 2010.

/s/Michael D. Killgore
Michael D. Killgore