Exhibit 24

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints Mark A. Menghini, acting singly and with full power of substitution, the undersigned’s true and lawful attorney-in-fact to:

execute for and on behalf of the undersigned, in accordance with the undersigned’s capacity as a director of Aegion Corporation (the “Company”), Form 3, 4 and 5, and any amendments thereto, in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules thereunder;

do and perform any and all acts for and on behalf of the undersigned, which may be necessary or desirable to complete and execute any such Form 3, 4 or 5, complete and execute any amendments thereto, and timely file such form(s) with the U.S. Securities and Exchange Commission and any securities exchange or similar authority; and

take any other action in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by or for, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such informaton and disclosure as such attorney-in-fact may approve in his or her discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever required, necessary or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact’s substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted.

The undersigned acknowledges that the foregoing attorney-in-fact, in serving in such capacity at the request of the undersigned, is not assuming, nor is the Company assuming, any of the undersigned’s responsibilities to comply with, or any liability for the failure to comply with, any provision of Section 16 of the Exchange Act.

This Power of Attorney revokes any Power of Attorney previously executed by the undersigned with respect to the undersigned’s reporting obligation pursuant to Section 16 of the Act. This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned’s holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorney-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed this 12^th day of December 2018.

/s/ Stephanie A. Cuskley

Stephanie A. Cuskley

Cuskley Stephanie A 4