QuickLinks -- Click here to rapidly navigate through this document


Exhibit 10.6


FIRST AMENDMENT TO THE
RESTRICTED SHARE AWARD AGREEMENT
FOR TIMOTHY M. JONES EFFECTIVE AS OF JULY 1, 1999

        This Amendment No. 1 is made, effective as of January 2, 2003 by and between Mack-Cali Realty Corporation, a Maryland corporation (the "Company") and Timothy M. Jones (the "Recipient").

        Whereas, the Company and the Recipient entered into an Agreement Evidencing the Grant of a Restricted Share Award effective as of July 1, 1999 (the "Agreement"), pursuant to which the Company awarded 37,500 shares of the Company's common stock, par value $.01 per share ("Common Stock") to the Recipient pursuant to the Employee Stock Option Plan of Mack-Cali Realty Corporation which was originally effective August 31, 1994 and amended and restated as of December 1, 1998 (the "Plan"), and

        Whereas, pursuant to the terms of, and authority granted under, the Plan and the Agreement, the Company and Recipient wish to amend the Agreement as set forth herein;

        Now Therefore, the parties hereto hereby agree as follows:

        1.    Definitions.    

        Capitalized terms not otherwise defined herein shall have the meanings set forth in the Agreement.

        2.    Amendments to the Restricted Share Award Agreement.    

        (i)    Section 2(a) of the Agreement is hereby deleted in its entirety and replaced with the following:    

        (ii)    Section 2(b) of the Agreement is hereby deleted in its entirety and replaced with the following:    

Restricted Shares

  Vesting Date
5,625   January 1, 2000
5,625   January 1, 2001
7,500   January 1, 2002
Restricted Shares

  Vesting Date
9,375   January 2, 2003

Restricted Shares

  Vesting Date
 
1,406   January 1, 2004  
1,406   January 1, 2005  
1,875   January 1, 2006  
2,344   January 1, 2007  
2,344   January 1, 2008 "

        (iii)    Sections 2(d) and 2(e) of the Agreement shall be renumbered as Sections 2(f) and 2(g), respectively, and the following new sections 2(d) and 2(e) shall be inserted:    

        3.    Miscellaneous.    Except as specifically amended above, the Agreement and all provisions thereof shall remain in full force and effect and are hereby ratified and confirmed. Additionally, upon the effectiveness of this Amendment, on and after the date hereof, each reference in the Agreement to "this Agreement", "hereunder", "hereof", "herein" or words of like import, and each reference to the Agreement in any document relating to the Agreement, shall mean and be a reference to the Agreement as amended hereby.

THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK.

2


        In Witness Whereof, the parties hereto have executed this Amendment effective as of the date first written above.

    Mack-Cali Realty Corporation

 

 

By:

/s/  
MITCHELL E. HERSH      
Name: Mitchell E. Hersh
Title: Chief Executive Officer

 

 

Recipient

 

 

/s/  
TIMOTHY M. JONES      
Timothy M. Jones

3




QuickLinks

FIRST AMENDMENT TO THE RESTRICTED SHARE AWARD AGREEMENT FOR TIMOTHY M. JONES EFFECTIVE AS OF JULY 1, 1999