MATRIX SERVICE CO
CEO CERTIFICATION
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 <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV ALIGN="center"><FONT FACE="ARIAL" SIZE="2" COLOR="#000000"><B>Exhibit 10.1 </B></FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV ALIGN="center"><FONT
FACE="ARIAL" SIZE="2" COLOR="#000000"><B>CERTIFICATION PURSUANT TO </B></FONT></DIV> <DIV ALIGN="center"><FONT FACE="ARIAL" SIZE="2" COLOR="#000000"><B>18 U.S.C. SECTION 1350, </B></FONT></DIV> <DIV ALIGN="center"><FONT FACE="ARIAL" SIZE="2"
COLOR="#000000"><B>AS ADOPTED PURSUANT TO </B></FONT></DIV> <DIV ALIGN="center"><FONT FACE="ARIAL" SIZE="2" COLOR="#000000"><B>SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 </B></FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT
FACE="ARIAL" 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 November 30, 2002 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:
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<TD WIDTH="3%" VALIGN="top" ALIGN="left"><DIV><FONT FACE="ARIAL" SIZE="2" COLOR="#000000">1.</FONT></DIV></TD>
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<TD ALIGN="left" VALIGN="top"><DIV><FONT FACE="ARIAL" 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></DIV> </TD></TR></TABLE> <DIV><FONT
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<TD WIDTH="3%" VALIGN="top" ALIGN="left"><DIV><FONT FACE="ARIAL" SIZE="2" COLOR="#000000">2.</FONT></DIV></TD>
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<TD ALIGN="left" VALIGN="top"><DIV><FONT FACE="ARIAL" 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></DIV>
</TD></TR></TABLE> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT FACE="ARIAL" 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></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT FACE="ARIAL" SIZE="2" COLOR="#000000">

<IMG SRC="g59909g02s69.jpg" ALT="LOGO"> </FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT FACE="ARIAL" SIZE="2" COLOR="#000000">Bradley S. Vetal </FONT></DIV> <DIV><FONT FACE="ARIAL" SIZE="2" COLOR="#000000">Chief Executive Officer
</FONT></DIV> <DIV><FONT FACE="ARIAL" SIZE="2" COLOR="#000000">January 9, 2003 </FONT></DIV>
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