MATRIX SERVICE CO
SECTION 906 CERTIFICATION- CEO
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<P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P><P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>Exhibit 10.1
</B></FONT></P><P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P><P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>CERTIFICATION PURSUANT TO
</B></FONT></P><P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>18 U.S.C. SECTION 1350, </B></FONT></P><P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>AS ADOPTED PURSUANT TO </B></FONT></P><P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>SECTION 906 OF THE SARBANES-OXLEY ACT OF
2002 </B></FONT></P><P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P><P STYLE="margin-top:0px;margin-bottom:0px"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">In connection with the Quarterly Report of Matrix
Service Company, Inc. (the &#147;Company&#148;) on form 10-Q for the period ended February 28, 2003 as filed with the Securities and Exchange Commission on the date hereof (the &#147;Report&#148;), I Bradley S. Vetal, Chief Executive Officer of the
Company, certify, pursuant to 18 U.S.C. &#167; 1350, as adopted pursuant to &#167; 906 of the Sarbanes-Oxley Act of 2002, that based on my knowledge: </FONT></P><P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
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<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">1.</FONT></TD>
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<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and </FONT></TD></TR></TABLE><P
STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
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<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">2.</FONT></TD>
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<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.
</FONT></TD></TR></TABLE><P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P><P STYLE="margin-top:0px;margin-bottom:0px"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">This certification is deemed to accompany this
Quarterly Report on Form 10-Q, but is not deemed &#147;filed&#148; for purpose of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise. </FONT></P><P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
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<TD VALIGN="top" COLSPAN="3" WIDTH="37%"> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:2%; text-indent:-2%" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">

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<TD VALIGN="top" COLSPAN="3" WIDTH="37%"><HR SIZE="1" NOSHADE COLOR="#000000" ALIGN="left"> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><B>Bradley S. Vetal</B></FONT></P></TD></TR>

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<TD VALIGN="top" COLSPAN="3" ALIGN="center" WIDTH="37%"> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><B>Chief Executive Officer</B></FONT></P></TD></TR>
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<TD VALIGN="top" COLSPAN="3" ALIGN="center" WIDTH="37%"> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><B>April 10, 2003</B></FONT></P></TD></TR>
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