(Aegion Logo) Policy #:P-HR-02Effective Date:March 15, 2017Subject:Severance Policy Maintained By:SVP of Human ResourcesApproved By:Compensation CommitteeApplies to: Aegion and/or its SubsidiariesSupersedes:March 1, 2017

This Severance Policy (the “Policy”) is applicable to Aegion Corporation and its subsidiaries (together the “Company”).

This Policy is designed to provide a competitive package to aid employees affected by a position elimination or reduction in force during their transition period. The Plan creates a tiered approach that considers tenure and position level in determining employee benefits.

This Policy applies to non-union employees of the Company who are actively employed, have completed a minimum of six (6) months’ continuous service time (or two (2) years’ continuous service time for hourly field/production employees), are in good standing with the Company and whose employment is terminated involuntarily as a result of a reduction in force or position elimination, where a comparable position is not available. This Policy does not apply in the event of termination for cause or termination due to a violation of the Company’s Code of Conduct.

International employees generally are eligible for benefits pursuant to provincial or country requirement. Should none exist, this Policy will apply. Employees subject to an employment agreement that sets forth severance benefits different than those contained in this Policy will not be eligible for payments under this plan.

Severance benefits due a separated employee will be determined by position and uninterrupted tenure, as outlined below, and will be provided pursuant to the execution of any requested actions, including, but not limited to: timely return of an unaltered and signed release agreement, return of all company property, and completion of any position-related tasks specific to the Company. All severance payments will be processed as extended payroll, with applicable taxes and deductions, through the term of the applicable severance period.

while paying only his/her normal employee contribution via payroll deduction from the severance payments.

For Canadian employees, group supplemental health and welfare coverage will be extended through the term of severance payments at the normal employee contribution rate taken via payroll deduction.

Severance periods are based on employee classification, as set forth below:

This Policy is a statement of intent and is not a contract. It is not a guarantee of employment and employment with the Company remains “at will.” This Policy may be modified, suspended or terminated at any time and all payments are at the discretion of the Compensation Committee of the Board of Directors of Aegion Corporation. This Policy may be changed during the year without any obligation to pay for the elapsed part of the year in the manner described in the Policy. The decisions of the Chief Administrative Officer, the Senior Vice President of Human Resources, the Board of Directors and/or the Compensation Committee in administering the Policy are final and binding on all persons.