Exhibit 16.1

                                BDO Seidman, LLP
                  Certified Public Accountants and Consultants



Securities and Exchange Commission
100 F Street N.E.
Washington, D.C.  20549

We have been  furnished  with a copy of the response to item 4.01(a) of Form 8-K
for the event that occurred on June 28, 2006, to be filed by our former  client,
Arpeggio Acquisition Corporation (currently Hill International,  Inc.). We agree
with the statements  made in response to that item insofar as they relate to our
Firm.

Very truly yours,



BDO SEIDMAN, LLP
June 28, 2006