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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">UNITED
      STATES</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SECURITIES
      AND EXCHANGE COMMISSION</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">WASHINGTON,
      DC 20549</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>______________</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>FORM
      8-K</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CURRENT
      REPORT</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">PURSUANT
      TO SECTION 13 OR 15(d) OF THE</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SECURITIES
      EXCHANGE ACT OF 1934</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Date
      of
      Report (Date of earliest event reported): </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>August
      14, 2006</u></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong><u>HILL
      INTERNATIONAL, INC.</u></strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Exact
      Name of Registrant as Specified in Charter)</font></div>
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    <div>
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            <td valign="top" width="30%" style="border-bottom: black thin solid;">
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            </td>
            <td valign="top" width="3%">&#160;</td>
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            </td>
            <td valign="top" width="3%">&#160;</td>
            <td valign="top" width="23%" style="border-bottom: black thin solid;">
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            </td>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(State
                or Other Jurisdiction</font></div>
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                Incorporation)</font></div>
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            <td valign="top" width="3%">&#160;</td>
            <td valign="top" width="21%">
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                </font></div>
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                Number)</font></div>
            </td>
            <td valign="top" width="3%">&#160;</td>
            <td valign="top" width="23%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(IRS
                Employer </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Identification
                No.)</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td valign="top" width="53%" style="border-bottom: black thin solid;">
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                Lippincott Centre, Marlton, NJ</font></div>
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            <td valign="top" width="13%">&#160;</td>
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          <tr>
            <td valign="top" width="53%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Address
                of Principal Executive Offices)</font></div>
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            <td valign="top" width="13%">&#160;</td>
            <td valign="top" width="14%">
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                Code)</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Registrant&#8217;s
      telephone number, including area code:</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>(856)
      810-6200</u></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Arpeggio
      Acquisition Corporation</u></font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Former
      Name or Former Address, if Changed Since Last Report)</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Check
      the
      appropriate box below if the Form 8-K filing is intended to simultaneously
      satisfy the filing obligation of the registrant under any of the following
      provisions (see General Instruction A.2. below):</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Wingdings">&#168;</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 36.8pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Written
      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425)</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Wingdings">&#168;</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 36.8pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Soliciting
      material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 45pt; TEXT-INDENT: -45pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Wingdings">&#168;</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 36.8pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b))</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 45pt; TEXT-INDENT: -45pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Wingdings">&#168;</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 36.8pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c))</font></div><br>
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      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center">&#160;</div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Item
      4.01 Changes in Registrant&#8217;s Certifying Accountant.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(b)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Hill
      International, Inc. (the &#8220;Registrant&#8221;) has engaged Amper, Politziner &amp;
Mattia, P.C. (&#8220;APM&#8221;) as its independent registered public accountants, effective
      August 14, 2006. The decision to engage APM as the Registrant&#8217;s independent
      registered public accountants was made by the Audit Committee of the Board
      of
      Directors of the Registrant. </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">During
      the Registrant&#8217;s two most recent fiscal years and the interim period preceding
      the engagement of APM, the Registrant has not consulted with APM regarding
      the
      application of accounting principles to a specified transaction, either
      completed or proposed, or the type of audit opinion that might be rendered
      on
      the Registrant&#8217;s financial statements, resulting in provision of a written
      report or oral advise to the Registrant which APM concluded was an important
      factor considered by the Registrant in reaching a decision as to an accounting,
      auditing or financial reporting issue. In addition, during the Registrant&#8217;s two
      most recent fiscal years and the interim period preceding the engagement of
      APM,
      the Registrant has not consulted with APM regarding any matter that was either
      the subject of a disagreement (as defined in paragraph (a)(1)(iv) of Item 304
      of
      Regulation S-B) or reportable event (as defined in paragraph (a)(1)(v) of Item
      304 of Regulation S-B).</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div><br>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left">&#160;</div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center">&#160;</div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right">&#160;</div>
      </div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>SIGNATURES</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
      to the requirements of the Securities Exchange Act of 1934, the registrant
      has
      duly caused this report to be signed on its behalf by the undersigned hereunto
      duly authorized.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div align="left">
      <table border="0" cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td align="left" valign="top" width="55%">&#160;</td>
            <td align="left" valign="top" width="45%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">HILL
                INTERNATIONAL, INC. </font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="55%">&#160;</td>
            <td align="left" valign="top" width="45%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="55%">&#160;</td>
            <td align="left" valign="top" width="45%">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="55%">&#160;</td>
            <td align="left" valign="top" width="45%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="55%">&#160;</td>
            <td align="left" valign="top" width="45%" style="border-bottom: black thin solid;">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">By:
                </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                Irvin E. Richter</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="55%">&#160;</td>
            <td align="left" valign="top" width="45%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Name:
                Irvin E. Richter</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="55%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Dated:August
                18, 2006</font></div>
            </td>
            <td align="left" valign="top" width="45%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Title:
                Chairman and Chief Executive
                Officer</font></div>
            </td>
          </tr>

      </table>
    </div>
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{"company-data": {"conformed-name": "Hill International, Inc.", "cik": "0001287808", "assigned-sic": "8711", "irs-number": "200953973", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-50781", "film-number": "061043175"}, "business-address": {"street1": "303 LIPPINCOTT CENTRE", "city": "MARLTON", "state": "NJ", "zip": "08053", "phone": "(856) 810-6200"}, "mail-address": {"street1": "303 LIPPINCOTT CENTRE", "city": "MARLTON", "state": "NJ", "zip": "08053"}, "former-company": {"former-conformed-name": "ARPEGGIO ACQUISITION CORP", "date-changed": "20040420"}}
Unassociated Document
UNITED
      STATES
SECURITIES
      AND EXCHANGE COMMISSION
WASHINGTON,
      DC 20549
______________
FORM
      8-K
CURRENT
      REPORT
PURSUANT
      TO SECTION 13 OR 15(d) OF THE
SECURITIES
      EXCHANGE ACT OF 1934
Date
      of
      Report (Date of earliest event reported):
August
      14, 2006
HILL
      INTERNATIONAL, INC.
(Exact
      Name of Registrant as Specified in Charter)
Delaware
000-50781
20-0953973
(State
                or Other Jurisdiction
of
                Incorporation)
(Commission
File
                Number)
(IRS
                Employer
Identification
                No.)
303
                Lippincott Centre, Marlton, NJ
08053
(Address
                of Principal Executive Offices)
(Zip
                Code)
Registrant's
      telephone number, including area code:
(856)
      810-6200
Arpeggio
      Acquisition Corporation
(Former
      Name or Former Address, if Changed Since Last Report)
Check
      the
      appropriate box below if the Form 8-K filing is intended to simultaneously
      satisfy the filing obligation of the registrant under any of the following
      provisions (see General Instruction A.2. below):
¨
Written
      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425)
¨
Soliciting
      material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)
¨
Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b))
¨
Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c))
Item
      4.01 Changes in Registrant's Certifying Accountant.
(b)
Hill
      International, Inc. (the "Registrant") has engaged Amper, Politziner &
Mattia, P.C. ("APM") as its independent registered public accountants, effective
      August 14, 2006. The decision to engage APM as the Registrant's independent
      registered public accountants was made by the Audit Committee of the Board
      of
      Directors of the Registrant.
During
      the Registrant's two most recent fiscal years and the interim period preceding
      the engagement of APM, the Registrant has not consulted with APM regarding
      the
      application of accounting principles to a specified transaction, either
      completed or proposed, or the type of audit opinion that might be rendered
      on
      the Registrant's financial statements, resulting in provision of a written
      report or oral advise to the Registrant which APM concluded was an important
      factor considered by the Registrant in reaching a decision as to an accounting,
      auditing or financial reporting issue. In addition, during the Registrant's two
      most recent fiscal years and the interim period preceding the engagement of
      APM,
      the Registrant has not consulted with APM regarding any matter that was either
      the subject of a disagreement (as defined in paragraph (a)(1)(iv) of Item 304
      of
      Regulation S-B) or reportable event (as defined in paragraph (a)(1)(v) of Item
      304 of Regulation S-B).
SIGNATURES
Pursuant
      to the requirements of the Securities Exchange Act of 1934, the registrant
      has
      duly caused this report to be signed on its behalf by the undersigned hereunto
      duly authorized.
HILL
                INTERNATIONAL, INC.
By:
/s/
                Irvin E. Richter
Name:
                Irvin E. Richter
Dated:August
                18, 2006
Title:
                Chairman and Chief Executive
                Officer