Exhibit 31.2

CERTIFICATION

I, Robert J. Ambrosi, certify that:



|1. | I have reviewed this annual report on Form 10-K of ARC Corporate Realty Trust, Inc.;
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|2. | Based on my knowledge, this annual report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light
of the circumstances under which such statements were made, not misleading with respect to the period covered by this annual report;
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|3. | Based on my knowledge, the financial statements, and other financial information included in this annual report, fairly present in all material respects the financial condition,
results of operations and cash flows of ACRT as of, and for, the periods presented in this annual report;
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|4. | ACRTs other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and
15d-15(e) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for ACRT and have:
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| | a. | designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information
relating to ACRT, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this annual report is being prepared;
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| | b. | designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under my supervision, to provide reasonable
assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
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| | c. | evaluated the effectiveness of ACRTs disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and
procedures as of the end of the period covered by this annual report based on such evaluation; and
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| | d. | disclosed in this annual report any change in ACRTs internal control over financial reporting that occurred during ACRTs fourth fiscal quarter that has materially
affected, or is reasonably likely to materially affect, ACRTs internal control over financial reporting;
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|5. | ACRTs other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to ACRTs independent registered
public accounting firm and the Audit Committee of ACRTs board of directors:
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| | a. | all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect
ACRTs ability to record, process, summarize and report financial information; and
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| | b. | any fraud, whether or not material, that involves management or other employees who have a significant role in ACRTs internal control over financial reporting.
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|/s/ Robert J. Ambrosi  
|Robert J. Ambrosi      
|Chief Executive Officer
|November 5, 2008