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        <link:definition>9955540 - Disclosure - Commitments and Contingencies (Details)</link:definition>
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      <link:roleType id="SubsequentEventsDetails" roleURI="http://www.ies-co.com/role/SubsequentEventsDetails">
        <link:definition>9955541 - Disclosure - Subsequent Events (Details)</link:definition>
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        <link:definition>9955542 - Disclosure - Business Combinations and Asset Acquisitions (Details)</link:definition>
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        <link:definition>9955543 - Disclosure - Goodwill and Intangible Assets (Details)</link:definition>
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</xs:schema>
