EX-3.1

Exhibit 3.1

THIRD AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

NCS MULTISTAGE HOLDINGS, INC.

1. The name of the corporation is NCS Multistage Holdings, Inc. (the “Corporation”).

2. The Registered Office of the Corporation in the State of Delaware is located at Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County of New Castle, Zip Code 19801. The name of the Registered Agent at such address upon whom process against the Corporation may be served is The Corporation Trust Company.

3. The purpose of the Corporation is to engage in any lawful act or activity for which corporations may be organized under the Delaware General Corporation Law (the “DGCL”).

4. The total amount of stock the Corporation is authorized to issue is 1,000 shares with a par value of $0.001 per share.

5. (a) To the fullest extent permitted by the DGCL, as the same exists or as may hereafter be amended, no director of the Corporation shall have any personal liability to the Corporation or any of its stockholders for monetary damages for any breach of fiduciary duty as a director. If the DGCL is amended hereafter to permit the further elimination or limitation of the liability of directors, then the liability of a director of the Corporation shall be eliminated or limited to the fullest extent permitted by the DGCL, as so amended, without further action by the Corporation. Any alteration, amendment, addition to or repeal of this Section 5(a), or adoption of any provision of this Certificate of Incorporation inconsistent with this Section 5(a), shall not reduce, eliminate or adversely affect any right or protection of a director of the Corporation existing at the time of such alteration, amendment, addition to, repeal or adoption with respect to acts or omissions occurring prior to such alteration, amendment, addition to, repeal or adoption.

(b) The Corporation shall indemnify, advance expenses to and hold harmless, to the fullest extent permitted by applicable law as it presently exists or may hereafter be amended, any person (“Indemnitee”) who was or is made or is threatened to be made a party or is otherwise involved in any threatened, pending or completed action, suit, arbitration, mediation, alternate dispute resolution mechanism, investigation, inquiry, administrative hearing or any other actual, threatened or completed proceeding, whether brought by or in the right of the Corporation or otherwise and whether of a civil (including intentional or unintentional tort claims), criminal, administrative or investigative (formal or informal) nature, including appeal therefrom, in which Indemnitee was, is, will or might be involved as a party, potential party, non-party witness or otherwise by reason of the fact that Indemnitee is or was a director, officer, employee or agent of the Corporation, by reason of any action (or failure to act) taken by him or her of any action (or failure to act) on his or her part while acting as a director, officer, employee or agent of the Corporation, or by reason of the fact that Indemnitee is or was serving at the request of the Corporation as a director, officer, trustee, general partner, managing member, fiduciary, employee or agent of any other Enterprise, in each case whether or not serving in such capacity at the time