UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 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): June 28, 2006
                                                           -------------

                             HILL INTERNATIONAL,INC.
               (Exact Name of Registrant as Specified in Charter)

          Delaware                     000-50781            20-0953973
------------------------------     -----------------   ------------------------
(State or Other Jurisdiction          (Commission          (IRS Employer
      of Incorporation)              File Number)       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))


<PAGE>

Item 4.01 Changes in Registrant's Certifying Accountant.

      (a) On June 28, 2006,  Arpeggio  Acquisition  Corporation  (the "Company")
dismissed BDO Seidman,  LLP as its independent  registered public accountants in
connection with the closing that day of the merger of Hill  International,  Inc.
with and into the  Company.  The decision was approved by the Board of Directors
of the Company.  In connection with the merger,  the Company changed its name to
Hill International, Inc.

      The  report of BDO  Seidman,  LLP on the  Company's  balance  sheets as of
December  31,  2005  and  2004,  and  the  related   statements  of  operations,
stockholders'  equity and cash flows for the year ended  December 31, 2005,  the
period ended December 31, 2004 and the period from April 2, 2004  (inception) to
December  31,  2005,  respectively,  did  not  contain  an  adverse  opinion  or
disclaimer of opinion. However, such report dated February 28, 2006 contained an
explanatory  paragraph  relating  to the ability of the Company to continue as a
going concern.

      During the Company's  fiscal  periods ended December 31, 2005 and 2004 and
during the subsequent  interim periods preceding the termination,  there were no
disagreements  with BDO Seidman,  LLP on any matter of accounting  principles or
practices, financial statement disclosure, or auditing scope or procedure, which
disagreements,  if not resolved to the  satisfaction  of BDO Seidman,  LLP would
have caused BDO  Seidman,  LLP to make  reference  to the subject  matter of the
disagreements in connection with its report on the financial statements for such
years or subsequent interim periods.

      There were no  reportable  events as  described  in Item 304  (a)(i)(v) of
Regulation S-B during the period from April 2, 2004  (inception) to December 31,
2005.

      The  Company  requested  that BDO  Seidman,  LLP  furnish it with a letter
addressed to the Securities and Exchange  Commission  stating  whether or not it
agrees with the Company's  statements in this Item 4.01(a). A copy of the letter
furnished by BDO Seidman, LLP in response to that request,  dated June 28, 2006,
is filed as Exhibit 16.1 to this Form 8-K.

Item 9.01  Financial Statements and Exhibits.

      (a)   Financial statements of business acquired. None.

      (b)   Pro forma financial information. None.

      (c)   Shell Company Transactions. None.

      (d)   Exhibits.


      Exhibit Number                Description

            16.1            Letter from BDO  Seidman,  LLP dated June 28,  2006
                            regarding change in certifying accountant.


                                       2
<PAGE>


                                   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: June 30, 2006              Title: Chairman and
                                         Chief Executive Officer


                                       3
{"company-data": {"conformed-name": "Hill International, Inc.", "cik": "0001287808", "assigned-sic": "6770", "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": "06936344"}, "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"}}
UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 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): June 28, 2006
                                                           -------------

                             HILL INTERNATIONAL,INC.
               (Exact Name of Registrant as Specified in Charter)

          Delaware                     000-50781            20-0953973
------------------------------     -----------------   ------------------------
(State or Other Jurisdiction          (Commission          (IRS Employer
      of Incorporation)              File Number)       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.

      (a) On June 28, 2006,  Arpeggio  Acquisition  Corporation  (the "Company")
dismissed BDO Seidman,  LLP as its independent  registered public accountants in
connection with the closing that day of the merger of Hill  International,  Inc.
with and into the  Company.  The decision was approved by the Board of Directors
of the Company.  In connection with the merger,  the Company changed its name to
Hill International, Inc.

      The  report of BDO  Seidman,  LLP on the  Company's  balance  sheets as of
December  31,  2005  and  2004,  and  the  related   statements  of  operations,
stockholders'  equity and cash flows for the year ended  December 31, 2005,  the
period ended December 31, 2004 and the period from April 2, 2004  (inception) to
December  31,  2005,  respectively,  did  not  contain  an  adverse  opinion  or
disclaimer of opinion. However, such report dated February 28, 2006 contained an
explanatory  paragraph  relating  to the ability of the Company to continue as a
going concern.

      During the Company's  fiscal  periods ended December 31, 2005 and 2004 and
during the subsequent  interim periods preceding the termination,  there were no
disagreements  with BDO Seidman,  LLP on any matter of accounting  principles or
practices, financial statement disclosure, or auditing scope or procedure, which
disagreements,  if not resolved to the  satisfaction  of BDO Seidman,  LLP would
have caused BDO  Seidman,  LLP to make  reference  to the subject  matter of the
disagreements in connection with its report on the financial statements for such
years or subsequent interim periods.

      There were no  reportable  events as  described  in Item 304  (a)(i)(v) of
Regulation S-B during the period from April 2, 2004  (inception) to December 31,
2005.

      The  Company  requested  that BDO  Seidman,  LLP  furnish it with a letter
addressed to the Securities and Exchange  Commission  stating  whether or not it
agrees with the Company's  statements in this Item 4.01(a). A copy of the letter
furnished by BDO Seidman, LLP in response to that request,  dated June 28, 2006,
is filed as Exhibit 16.1 to this Form 8-K.

Item 9.01  Financial Statements and Exhibits.

      (a)   Financial statements of business acquired. None.

      (b)   Pro forma financial information. None.

      (c)   Shell Company Transactions. None.

      (d)   Exhibits.

      Exhibit Number                Description

            16.1            Letter from BDO  Seidman,  LLP dated June 28,  2006
                            regarding change in certifying accountant.

                                       2
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: June 30, 2006              Title: Chairman and
                                         Chief Executive Officer

                                       3