Exhibit 1

JOINT FILING AGREEMENT

The undersigned hereby agree that the statement on Schedule 13G with respect to the Common Stock of ENGlobal Corporation is, and any amendment thereto signed by each of the undersigned shall be, filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of 13d-1(k) under the Securities Exchange Act of 1934, as amended.

Date: August 26, 2011
NGP Energy Technology Partners II, L.P.
By: NGP ETP II, L.L.C.
Its: General Partner
By:	/s/ Philip J. Deutch
Name:	Philip J. Deutch
Title:	Authorized Member
NGP ETP II, L.L.C.
By:	/s/ Philip J. Deutch
Name:	Philip J. Deutch
Title:	Authorized Member
Energy Technology Partners, L.L.C.
By:	/s/ Philip J. Deutch
Name:	Philip J. Deutch
Title:	Sole Member and Manager
/s/ Philip J. Deutch
Philip J. Deutch