Exhibit

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-159971, 333-154711, 333-173779, 333-66714, 333-66712, 333-134251, 333-134252, 333-190315, 333-211130, 333-211131, 333-217531, 333-217532 and 333-224650) of Aegion Corporation of our report dated March 1, 2019, relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.