Natural Gas Services (NGS) 10-Q/A 2007 Q1 Quarterly report (amended)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A
Amendment No. 1

þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period endedMarch 31, 2007

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from          to

Commission File Number 1-31398

NATURAL GAS SERVICES GROUP, INC.

(Exact name of registrant as specified in its charter)

Colorado	75-2811855
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

2911 SCR 1260
Midland, Texas 79706
(Address of principal executive offices)

(432) 563-3974
(Issuer’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yesþ Noo

Indicate by check mark whether the registrant is a large accelerated filer, and accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act.

Large Accelerated Filero           Accelerated Filerþ           Non Accelerated Filero

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yeso           Noþ

APPLICABLE ONLY TO CORPORATE ISSUERS

Indicate the number of shares outstanding of each of the issuer’s classes of common equity, as of the latest practicable date.

Class	Outstanding at May 09, 2007
Common Stock, $.01 par value	12,069,166

Explanatory Note

     Natural Gas Services Group, Inc. (the “Company”) filed its Quarterly Report on Form 10-Q for the quarter ended March 31, 2007 (the “Original Quarterly Report”) with the Securities and Exchange Commission on May 10, 2007 (the “Original Filing Date”). The Company is filing this Amendment on Form 10-Q/A for the sole purpose of amending Exhibits 31.1 and 31.2 (collectively, the “Exhibits”) of the Original Quarterly Report to include paragraph 4(b) as required by Regulation S-K Item 601(b)(31). Paragraph 4(b) was inadvertently omitted from the Exhibits as filed with the Original Quarterly Report. No modification or update to the Original Quarterly Report is otherwise effected by this Amendment, nor does this Amendment reflect any events occurring after the Original Filing Date.

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TABLE OF CONTENTS

Certification Pursuant to Section 302

Certification Pursuant to Section 302

SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

NATURAL GAS SERVICES GROUP, INC.
/s/ Stephen C. Taylor	/s/ Earl R. Wait
Stephen C. Taylor	Earl R. Wait
President and Chief Executive Officer	Principal Accounting Officer and Treasurer
May 31, 2007

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