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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1. Name and Address of Reporting Person * Hazlett James R   2. Issuer Name and Ticker or Trading Symbol NATURAL GAS SERVICES GROUP INC [ngs] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP -- Technical Services (Last) (First) (Middle) 2208 S.C.R. 1084 1/2 3. Date of Earliest Transaction (Month/Day/Year) 01/22/2018 (Street) MIDLAND, TX 79706 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 01/22/2018   M   198 A $ 17.51 45,141 D   Common Stock 01/22/2018   S   198 D $ 28.9 44,943 D   Common Stock 01/23/2018   M   979 A $ 17.51 45,922 D   Common Stock 01/23/2018   S   979 D $ 28.95 44,943 D   Common Stock 01/23/2018   S   513 D $ 29 44,430 D   Common Stock 01/24/2018   M   200 A $ 17.51 44,630 D   Common Stock 01/24/2018   S   200 D $ 28.9 44,430 D

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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

Employee Stock Option

$ 17.51

01/22/2018

M

198

09/10/2009

09/10/2018

Common Stock

198

$ 0

1,281

D

Employee Stock Option

$ 17.51

01/23/2018

M

979

09/10/2009

09/10/2018

Common Stock

979

$ 0

302

D

Employee Stock Option

$ 17.51

01/24/2018

M

200

09/10/2009

09/10/2018

Common Stock

200

$ 0

102

D

Restricted Stock Units

(1)

(1)

(1)

Common Stock

15,000

15,000

D

Employee Stock Option

$ 17.74

12/09/2010

12/08/2019

Common Stock

10,000

10,000

D

Employee Stock Option

$ 17.81

01/25/2012

01/24/2021

Common Stock

10,000

10,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Hazlett James R 2208 S.C.R. 1084 1/2 MIDLAND, TX 79706			VP -- Technical Services

Signatures

James R. Hazlett		01/24/2018
**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).
(1)	Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment.

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