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 * Global Defense & National Security Holdings LLC   2. Issuer Name and Ticker or Trading Symbol STG Group, Inc. [GDEF] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O STG GROUP, INC., 11091 SUNSET HILLS ROAD, SUITE 200 3. Date of Earliest Transaction (Month/Day/Year) 11/23/2015 (Street) RESTON, VA 20190 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 (1) 11/23/2015   P   1,030,103 A $ 10.63 3,754,828 D   Common Stock (2) 11/23/2015   D   445,161 D $ 0 3,309,667 D   Common Stock (3) 11/23/2015   D   35,000 D $ 0 3,274,667 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

Convertible Promissory Note

$ 10.6 (4)

11/23/2015

J

$ 1,263,263

(4)

11/24/2015(4)

Common Stock

119,175 (4)

$ 0 (4)

0 (4)

D

Convertible Promissory Note

$ 10.6 (4)

11/23/2015

J

$ 1,343,790

(4)

11/24/2015(4)

Common Stock

126,772 (4)

$ 0 (4)

0 (4)

D

Convertible Promissory Note

$ 10.6 (4)

11/23/2015

J

$ 1,250,000

(4)

11/24/2015(4)

Common Stock

117,924 (4)

$ 0 (4)

0 (4)

D

Convertible Promissory Note

$ 10.6 (4)

11/23/2015

J

$ 711,447

(4)

11/24/2015(4)

Common Stock

67,117 (4)

$ 0 (4)

0 (4)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Global Defense & National Security Holdings LLC C/O STG GROUP, INC. 11091 SUNSET HILLS ROAD, SUITE 200 RESTON, VA 20190		X

Signatures

/s/ Damian Perl, Manager, Black Marlin Ltd		11/25/2015
**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)	Shares acquired pursuant to that certain Amended and Restated Backstop Common Stock Purchase Agreement, dated as of November 23, 2015, by and between Global Defense & National Security Systems, Inc. (the "Company") and Global Defense & National Security Holdings LLC.
(2)	Shares forfeited to the Company, pursuant to the Stock Purchase Agreement, dated as of June 8, 2015, by and between the Company, STG Group, Inc., the stockholders of STG Group, Inc. and the other parties thereto (the "Stock Purchase Agreement").
(3)	Shares transferred to the stockholders of STG Group, Inc. for no consideration in connection with the closing of the transactions contemplated by the Stock Purchase Agreement.
(4)	Following the consummation of the Issuer's initial Business Combination (as defined in the Issuer's Amended and Restated Certificate of Incorporation then in effect) on November 23, 2015, the convertible promissory note became convertible at the option of the holder at the greater of (1) $10.00 per share and (2) $10.60, the 30-day trailing average of the closing price per share. On November 23, 2015, in connection with closing the initial Business Combination and in consideration of the payment by the issuer of the face value of the convertible promissory notes, the outstanding principal due under the convertible promissory notes was repaid and such notes were canceled.

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