Exhibit 10.5

                          TRADEMARK SECURITY AGREEMENT



    FOR VALUE RECEIVED, the receipt and sufficiency of which are hereby 
acknowledged, the undersigned GRUBB & ELLIS COMPANY ("Debtor"), a Delaware 
corporation, hereby conveys a security interest to PNC BANK, NATIONAL 
ASSOCIATION ("Lender"), a national banking association, its successors and 
assigns, all of the Debtor's right, title and interest in and to (i) the 
trademarks and any applications therefor listed on EXHIBIT A hereto and (ii) 
any United States federally registered other trademarks and applications 
therefor which Debtor shall hereafter acquire, in each case including without 
limitation all proceeds thereof, (all of the aforesaid property being 
hereinafter referred to as the "Collateral") as security for the payment when 
due whether by declaration, acceleration or otherwise of the principal of and 
interest on each and every loan of Lender to the Debtor and each and every 
other liability of Debtor to Lender, including (i) all "Obligations", as such 
term is defined in the Credit Agreement of even date herewith among, inter 
alia, the Debtor and the Lender, as the same may be amended and modified from 
time to time (the "Credit Agreement"), (ii) liabilities now in existence, 
(iii) liabilities incurred or arising contemporaneously herewith, and (iv) 
liabilities that shall hereafter be incurred or arise (collectively, the 
"Liabilities").  Capitalized terms not otherwise defined herein shall have 
the meanings given to them in the Credit Agreement unless the context clearly 
indicates otherwise.

    1.   Debtor covenants and warrants that as of the date hereof and to the 
best of its knowledge:



         (a)  Each of the trademarks constituting a part of the Collateral is 
subsisting and has not been adjudged invalid or unenforceable;

         (b)  All of the trademarks constituting a part of the Collateral are 
valid and enforceable;

         (c)  No claim has been made that the use of any of the trademarks 
constituting a part of the Collateral does or may violate the rights of any 
third person;

         (d)  With the exception of licenses of the Collateral, the Debtor is 
the sole and exclusive owner of the entire and unencumbered right, title and 
interest in and to all of the trademarks constituting a part of the 
Collateral, free and clear of any liens, charges and encumbrances other than 
Permitted Liens (as defined in the Credit Agreement);

         (e)  Debtor has the unqualified right to enter into this Agreement 
and perform its terms;

         (f)  Debtor has used, and shall continue to use for the duration of 
this Agreement, consistent standards of quality in its services sold under 
any trademarks constituting part of the Collateral.

    2.   Debtor agrees that, until such time as all of the Liabilities shall 
have been satisfied in full, it shall not enter into any agreement  which is 
inconsistent with Debtor's obligations under this Agreement, without Lender's 
prior written consent;.

    3.   If, during the term of this Agreement, Debtor shall at any time or 
from time to time acquire any additional material United States federally 
registered trademarks and/or applications therefor not then listed on Exhibit 
A, the Debtor shall give to Lender prompt notice thereof in writing and the 
provisions hereof shall automatically apply thereto.




    4.   In any case mentioned in Section 3 hereof, Debtor authorizes Lender 
to modify this Agreement by amending Exhibit A to include any material United 
States federally registered trademarks and/or applications therefor so 
acquired by Debtor.

    5.   In addition to the rights and remedies available to Lender 
hereunder, Lender shall have such rights and remedies as are set forth in the 
Credit Agreement.  At such time as Debtor shall have satisfied in full all of 
the Liabilities and the Commitment is terminated, this Agreement shall 
terminate and Lender shall execute and deliver to Debtor all documents, 
instruments, agreement or any combination thereof as may be necessary or 
proper as the Debtors shall reasonably request to evidence such termination.

    6.   To the extent set forth in, and subject to, the Credit Agreement, 
any and all reasonable fees, costs and expenses of whatever kind or nature 
incurred by Lender in connection with the filing or recording of any 
documents, and the payment or discharge of reasonable counsel fees, 
maintenance fees or other costs of protecting, maintaining or preserving of 
any of the Collateral, or of defending or prosecuting any actions or 
proceedings arising out of or related to any of the Collateral, shall be 
borne and paid by Debtor on demand by Lender and until so paid shall be added 
to the principal amount of the Liabilities and shall bear interest at default 
rate prescribed in the instrument or instruments evidencing such Liabilities.

    7.   Debtor shall have the duty to prosecute diligently any application 
with respect to any material trademarks constituting a part of the Collateral 
pending as of the date of this Agreement or thereafter until the Liabilities 
shall have been paid in full, to make any necessary federal application with 
respect thereto, to file and prosecute opposition and cancellation 
proceedings, and to do any and all acts which are necessary to preserve and 
maintain all rights in 




all of the material trademarks constituting a part of the Collateral. Any 
expenses incurred in connection with the Collateral shall be borne by Debtor. 
Debtor shall not abandon any of the trademarks constituting a part of the 
Collateral, without the consent of Lender, which consent shall not be 
unreasonably withheld.  

    8.   If Debtor fails to comply with any of its obligations hereunder, 
Lender may after the occurrence and during the continuance of an Event of 
Default do so in Debtor's name or in Lender's name, but at Debtor's expense, 
and Debtor hereby agrees to in accordance with, and subject to the Credit 
Agreement, reimburse Lender in full for all expenses, including reasonable 
attorneys' fees, incurred by Lender in protecting, defending and maintaining 
any of the trademarks constituting a part of the Collateral.

    9.   No course of dealing between Debtor and Lender, nor any failure to 
exercise, nor any delay in exercising, on the part of Lender, any right, 
power or privilege hereunder or under any note or instrument evidencing any 
of the Liabilities or any agreement pursuant to which they were incurred 
shall operate as a waiver thereof; nor shall any single or partial exercise 
of any right, power or privilege hereunder or thereunder preclude any other 
or further exercise thereof or the exercise of any other right, power or 
privilege.

    10.  All of Lender's rights and remedies with respect  to any of the 
trademarks constituting a part of the Collateral, whether established hereby 
or by any instrument or instruments evidencing any of the Liabilities or by 
any other agreements or by law, shall be cumulative and may be exercised 
singularly or concurrently.

    11.  If any provision of this Agreement is hereafter determined to be 
unlawful, and if the unlawful provision can be deleted without altering the 
essence of this Agreement, the 




unlawful provision and only that provision shall be severed from this 
Agreement and the remaining provisions shall remain in full force and effect.

    12.  This Agreement is subject to modification only by a writing signed 
by the parties, except as provided in Section 4 hereof.

    13.  The benefits and burdens of this Agreement shall inure to the 
benefit of and be binding upon the respective successors and permitted 
assigns of the parties.

    14.  This Trademark Security Agreement and any other documents delivered 
in connection herewith and the rights and obligations of the parties hereto 
and thereto shall for all purposes be governed by and construed and enforced 
in accordance with the substantive law of the Commonwealth of Pennsylvania 
without giving effect to the principles of conflict of laws.

                       [SIGNATURES APPEAR ON NEXT PAGE]




                        [SIGNATURE PAGE 1 OF 1 TO TRADEMARK SECURITY AGREEMENT]



WITNESS the due execution hereof this 13th day of March, 1997.



                                            GRUBB & ELLIS COMPANY



                                            By: /s/ Brian Parker
                                               --------------------------------
                                                    Brian Parker
                                                    Senior Vice President and
                                                    Chief Financial Officer