Exhibit 3.1

SECOND AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

KSW, INC.

Pursuant to Sections 242 and 245 of the

General Corporation Law of the State of Delaware

KSW, Inc., a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), hereby certifies as follows:

1. The name of the Corporation is KSW, Inc.

2. The original certificate of incorporation of the Corporation was filed with the Secretary of State of the State of Delaware on December 28, 1993 and an amended and restated certificate of incorporation of the Corporation was filed with the Secretary of State of the State of Delaware on December 15, 1995.

3. The provisions of the amended and restated certificate of incorporation of the Corporation as herein amended are hereby restated and integrated into the single instrument which is hereinafter set forth, and which is entitled “Second Amended and Restated Certificate of Incorporation of KSW, Inc.”

4. This Second Amended and Restated Certificate of Incorporation, which restates, integrates and further amends the amended and restated certificate of incorporation of the Corporation, has been duly adopted in accordance with Sections 228, 242 and 245 of the General Corporation Law of the State of Delaware (“DGCL”).

5. Pursuant to Section 103(d) of the DGCL, this Second Amended and Restated Certificate of Incorporation will become effective upon filing with the Secretary of State of the State of Delaware.

6. The amended and restated certificate of incorporation of the Corporation, as amended and restated herein, shall read in its entirety as follows:

FIRST: The name of the corporation is KSW, Inc. (the “Corporation”).

SECOND: The address of the Corporation’s registered office in the State of Delaware is 2711 Centerville Road Suite 400 in the City of Wilmington, County of New Castle, Delaware 19808. The name of its registered agent at such address is Corporation Service Company.

THIRD: The purpose of the Corporation is to engage in any lawful act or activity for which corporations may be organized under the DGCL.

FOURTH: The total number of shares which the Corporation shall have the authority to issue is 100 shares of common stock, par value $0.01 per share.

FIFTH: In furtherance and not in limitation of the powers conferred by the laws of the State of Delaware, the board of directors of the Corporation is expressly authorized to adopt, amend, or repeal the bylaws of the Corporation.

SIXTH: Elections of directors need not be by written ballot unless the bylaws of the Corporation shall otherwise provide.

SEVENTH:

(a) Limitation of Liability.

(i) To the fullest extent permitted by the DGCL as it now exists or may hereafter be amended (but, in the case of any such amendment, only to the extent that such amendment permits the Corporation to provide broader exculpation rights than permitted prior thereto), no director of the Corporation shall be liable to the Corporation or its stockholders for monetary damages arising from a breach of fiduciary duty owed to the Corporation or its stockholders.

(ii) Any repeal or modification of the foregoing paragraph shall not adversely affect any right or protection of a director of the Corporation existing hereunder with respect to any act or omission occurring at or prior to the time of such repeal or modification.

(b) Right to Indemnification. Each person who was or is made a party or is threatened to be made a party to or is otherwise involved (including involvement, without limitation, as a witness) in any actual or threatened action, suit or proceeding, whether civil, criminal, administrative or investigative (a “proceeding”), by reason of the fact that such person is or was a director or officer of the Corporation or, while a director or officer of the Corporation, is or was serving at the request of the Corporation as an employee or agent of the Corporation or as a director, officer, partner, member, trustee, administrator, employee or agent of another corporation or of a partnership, joint venture, limited liability company, trust or other enterprise, including service with respect to an employee benefit plan (an “indemnitee”), whether the basis of such proceeding is alleged action in an official capacity as a director or officer or in any other capacity while serving as a director or officer, shall be indemnified and held harmless by the Corporation to the fullest extent authorized by the DGCL, as the same exists or may hereafter be amended (but, in the case of any such amendment, only to the extent that such amendment permits the Corporation to provide broader indemnification rights than permitted prior thereto), against all expense, liability and loss (including attorneys’ fees and related disbursements, judgments, fines, excise taxes or penalties under the Employee Retirement Income Security Act of 1974, as amended from time to time (“ERISA”), and any other penalties and amounts paid or to be paid in settlement) reasonably incurred or suffered by such indemnitee in connection therewith and such indemnification shall continue as to an indemnitee who has ceased to be a director, officer, employee or agent and shall inure to the benefit of the indemnitee’s heirs, executors and administrators; provided, however, that, except as provided in the last sentence of this Section (b) of this Article SEVENTH with respect to proceedings to enforce rights to indemnification, the

Corporation shall indemnify any such indemnitee in connection with a proceeding (or part thereof) initiated by such indemnitee only if such proceeding (or part thereof) was authorized by the Board of Directors of the Corporation. The right to indemnification conferred in this Section (b) of this Article SEVENTH shall be a contract right. It shall be a defense to any action by a director or officer for indemnification that the claimant has not met the standards of conduct which make it permissible under the DGCL for the Corporation to indemnify the claimant for the amount claimed, but the burden of proving such defense shall be on the Corporation.

(c) Insurance. The Corporation may purchase and maintain insurance on its own behalf and on behalf of any person who is or was or has agreed to become a director, officer, employee or agent of the Corporation or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any expense, liability or loss asserted against him or her and incurred by him or her in any such capacity, or arising out of his or her status as such, whether or not the Corporation would have the power to indemnify such person against such expenses, liability or loss under the DGCL.

(d) Service for Subsidiaries. Any person serving as a director, officer, employee or agent of another corporation, partnership, limited liability company, joint venture or other enterprise, at least 50% of whose equity interests are owned directly or indirectly by the Corporation (a “subsidiary” for this Article SEVENTH) shall be conclusively presumed to be serving in such capacity at the request of the Corporation.

(e) Other Rights; Continuation of Right to Indemnification. The rights to indemnification conferred in this Article SEVENTH shall not be exclusive of any other right which any person may have or hereafter acquire under this Certificate of Incorporation or under any statute, by-law, agreement, vote of stockholders or disinterested directors or otherwise. All rights to indemnification under this Article SEVENTH shall be deemed to be a contract between the Corporation and each director or officer of the Corporation who serves or served in such capacity at any time while this Article SEVENTH is in effect. Any repeal or modification of this Article SEVENTH or any repeal or modification of relevant provisions of the DGCL or any other applicable laws shall not in any way diminish any rights to indemnification and advancement of expenses of such director or officer or the obligations of the Corporation arising hereunder with respect to any proceeding arising out of, or relating to, any actions, transactions or facts occurring prior to the final adoption of such repeal or modification.

(f) Merger or Consolidation. For purposes of this Article SEVENTH, references to the “Corporation” shall include, in addition to the resulting corporation, any constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger which, if its separate existence had continued, would have had power and authority to indemnify its directors, officers and employees or agents, so that any person who is or was a director, officer, employee or agent of such constituent corporation, or is or was serving at the request of such constituent corporation as a director, officer, employee or agent of another corporation, partnership, joint venture,

trust or other enterprise, shall stand in the same position under this Article SEVENTH with respect to the resulting or surviving corporation as he or she would have with respect to such constituent corporation if its separate existence had continued.

(g) Savings Clause. If this Article SEVENTH or any portion hereof shall be invalidated on any ground by any court of competent jurisdiction, then the Corporation shall nevertheless indemnify and advance expenses to each person entitled to indemnification under Section (b) of this Article SEVENTH as to all expense, liability and loss (including attorneys’ fees and related disbursements, judgments, fines, ERISA excise taxes and penalties, and any other penalties and amounts paid or to be paid in settlement) actually and reasonably incurred or suffered by such person and for which indemnification is available to such person pursuant to this Article SEVENTH to the fullest extent permitted by any applicable portion of this Article SEVENTH that shall not have been invalidated and to the fullest extent permitted by applicable law.

EIGHTH: The Corporation reserves the right to amend, alter, change, or repeal any provision contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by statute, and all rights conferred herein are granted subject to this reservation.