Document:

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                                                                   EXHIBIT 10.16
                               AMENDMENT NO. 1 TO
                    AMENDED AND RESTATED EMPLOYMENT AGREEMENT

         This Amendment No. 1 to Amended and Restated Employment Agreement
("Amendment No. 1") is made and entered into this 18th day of May 1999,
effective as of the Effective Date between CB Richard Ellis Services, Inc. (the
"Company") and James J. Didion ("Executive").

                                   WITNESSETH:

         WHEREAS, Executive and Company have entered into an Amended and
Restated Employment Agreement dated as of March 3, 1999 (the "Existing
Agreement") which contemplates Employee's resignation as Chief Executive Officer
of the Company effective May 18, 1999, and

         WHEREAS, the parties believe that it is in their best interests to
clarify certain portions of the Existing Agreement.

         NOW THEREFORE, in consideration of the promises and the mutual
covenants contained herein, it is hereby agreed as follows:

         1.    Section 2 of the Existing Agreement is revised as follows:

               (a) In the last sentence of Section 2 the phrase "Chief Executive
          Officer" is amended to read "Chief Executive or Chief Operating
          Officer," and the phrase "substantial time" is amended to read
          "reasonable time."

               (b) The provisio to Section 2 is amended in its entirety to read
          as follows:

                    "provided, however, (i) Executive's primary assignment shall
               be to advance the Company's interests by participating in the
               National Realty Committee, the Urban Land Institute, and the
               University of California at Berkeley (Haas School) Real Estate
               Policy Advisory Board; (ii) all other assignments must be
               consistent with the duties which Executive would perform if he
               were Chairman of the Board of Directors of the Company; (iii) all
               assignments must be in writing and specify the authorities and
               responsibilities of Executive; and (iv) Executive shall not be
               required to perform service in excess of 100 hours per month
               (including travel time)."

          2.    A new sentence is added to Section 3(e) to read as follows:

               "As a matter of explanation and not limitation, Executive shall
               be reimbursed for all dues and meeting fees required to
               participate in the National Realty Committee, Urban Land
               Institute, and University of California at Berkeley (Haas School)
               Real Estate Policy Advisory Board and all expenses reasonably
               incurred by Executive with respect to such participation."

In witness whereof the parties have caused this Amendment No. 1 to be executed
this 24th day of May 1999.

CB RICHARD ELLIS SERVICES, INC.

By:      /s/ Ray Wirta
         --------------------------------------------
         Ray Wirta, Chief Executive Officer

         /s/ James J. Didion
         --------------------------------------------
         James J. Didion<PAGE>

                                                                   EXHIBIT 10.17

                                 AMENDMENT NO. 2

                                       TO

                    AMENDED AND RESTATED EMPLOYMENT AGREEMENT

         This Amendment No. 2 to Amended and Restated Employment Agreement is
entered into effective September 1, 1999 by and between CB Richard Ellis
Services, Inc., a Delaware Corporation (the "Company") and James J. Didion
("Executive").

                                   Witnesseth:

         Whereas CBRE and Executive have heretofore entered into an Amended and
Restated Employment Agreement dated as of March 3, 1999 as amended and Amendment
No. 1 dated May 18, 1999 (collectively the "Employment Agreement"); and

         Whereas the parties now wish to provide that Executive's salary under
the Employment Agreement as amended shall be subject to adjustment to reflect
changes in the cost of living.

         Now therefore the parties hereby agree as follows:

         Section 3(a) of the Employment Agreement is further amended by adding
the following paragraph at the end thereof.

         "Every September 1 (commencing September 1, 2000) Employee's annual
salary for the next twelve months shall be adjusted by multiplying the salary in
effect on the immediately preceding August 31 by a fraction the numerator of
which is one hundred plus the percentage change in the Applicable Index from
September 1, 1999 to the September 1 as of which the calculation is being made
and the denominator of which is the level of such index at the preceding
September 1. In the event the Applicable Index is not available until a date
later than the September 1 as of which an adjustment is being made then the
adjustment shall be made as soon as reasonably possible after the Applicable
Index is available and Employee's next salary check shall reflect the adjustment
for the period during which the Applicable Index was not available. The
Applicable Index means the United States Labor Department Cost of Living Index
(San Francisco Bay Area)."

         Except as specifically set forth herein the Employment Agreement shall
continue in accordance with its terms.

         In witness whereof the parties have caused this Amendment No. 2 to be
executed this 15th day of September 1999.

                                    CB Richard Ellis Services, Inc.

                                    By:        /s/ Ray Wirta
                                               ---------------------------------
                                               Ray Wirta,
                                               Chief Executive Officer

                                    Employee:  /s/ James J. Didion
                                               ---------------------------------
                                               James J. Didion<PAGE>

                                                                   EXHIBIT 10.18

                              ASSUMPTION AGREEMENT
                              --------------------

     ASSUMPTION AGREEMENT, dated as of July 19, 2001 (this "Agreement") between
                                                            ---------
BLUM CB Corp., a Delaware corporation (the "Company"), and James J. Didion
                                            -------
("Didion").
  ------

     WHEREAS, Didion is a party to that certain Amended and Restated Employment
Agreement dated as of March 3, 1999 (as amended, the "Employment Agreement"), by
                                                      --------------------
and between Didion and CB Richard Ellis Services, Inc., a Delaware corporation
("CB Richard Ellis Services"); and
  -------------------------

     WHEREAS, the Company is a party to the Amended and Restated Agreement and
Plan of Merger, initially dated as of February 23, 2001, amended and restated on
April 24, 2001, and further amended and restated on May 31, 2001 (the "Merger
                                                                       ------
Agreement"), by and among the Corporation, CBRE Holding, Inc., a Delaware
---------
corporation ("Holding"), and CB Richard Ellis Services, pursuant to the terms
              -------
and subject to the conditions of which, among other things, (1) the Company will
merge with and into CB Richard Ellis Services, (2) the separate existence of the
Company will cease and (3) CB Richard Ellis Services will continue its existence
as a wholly-owned subsidiary of Holding (such transactions, collectively, the
"Merger");
 ------

     NOW THEREFORE, for good and valuable consideration and intending to be
bound hereby, the parties hereto agree that, upon consummation of the Merger,
the surviving corporation in the Merger will, and hereby does, assume the
Employment Agreement.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the day and year first above written.

                                       JAMES J. DIDION

                                       /s/ James J. Didion
                                       -----------------------------------------

                                       BLUM CB CORP.

                                       By:   /s/ Claus J. Moller
                                             -----------------------------------
                                             Name:  Claus J. Moller
                                             Title: PresidentEXHIBIT 10.2
                                                                    ------------

                                    AGREEMENT
                                    ---------

THIS  AGREEMENT  MADE  EFFECTIVE AND EXECUTED AS OF May 11, 2001 (the "Effective
Date").

BETWEEN:
          REACH  TECHNOLOGIES,  INC
          -------------------------
          Suite  103  -  1581H  Hillside  Ave
          Victoria,  B.C.
          V8T  2C1
          ("REACH")
AND:
          BERT  LOGIC,  INC.
          ------------------
          Unit  130  -  2188  No.  5  Rd
          Richmond,  B.C.
          V6X  2T1
          ("BERT")
WHEREAS:
A.     REACH  (a  British Columbia Corporation) is in the business producing Bit
Error  Rate  Testers;
B.     BERT  (a Washington Corporation) is a corporation specifically created to
market  REACH'S  Bit Error Rate Testers through a Licensing Agreement with REACH
dated  May  31,  2000;
C.     REACH  and  BERT wish to amend the Licensing Agreement dated May 31, 2000
as  it  pertains  to  territories  (the  "Transaction");
D.     REACH  and  BERT  agree  that  this  Agreement  will constitute a binding
agreement  upon  them in respect of the Transaction, such to be on the terms and
conditions  contained  herein;
NOW  THEREFORE  THIS  AGREEMENT WITNESSES that in consideration of the covenants
and  agreements  herein contained, the parties hereto do covenant and agree (the
"Agreement")  each  with  the  other  as  follows:

                                        10
<PAGE>
1.   REPRESENTATIONS  AND  WARRANTIES
     --------------------------------
     1.1  BERT  represents  and  warrants  to  REACH  that  BERT  has  good  and
          sufficient  right and authority to enter into this Agreement and carry
          out  its  obligations under this Agreement on the terms and conditions
          set  forth herein, and this Agreement is a binding agreement upon BERT
          enforceable  against  it  in accordance with its terms and conditions.
     1.2  REACH  represents  and  warrants  to  BERT  that  REACH  has  good and
          sufficient  right and authority to enter into this Agreement and carry
          out  its  obligations under this Agreement on the terms and conditions
          set forth herein, and this Agreement is a binding agreement upon REACH
          enforceable  against  it  in accordance with its terms and conditions.

2.   LICENSE  AMENDMENT
     ------------------
     2.1  The parties agree that, in exchange for the payment by promissory note
          of  $5,000 by BERT to REACH and subject to the terms and conditions of
          this  Agreement,  REACH  will  add  the  territory  of  Arizona to the
          Licensing  Agreement dated May 31, 2000 and agrees to replace appendix
          A  to  the Agreement dated May 31, 2000 with the attached new appendix
          A.
     2.2  All  other  terms  in the Licensing Agreement dated May 31, 2000 shall
          remain.

3.     GENERAL
       -------
3.1     Time  and each of the terms and conditions of this Agreement shall be of
the  essence  of  this  Agreement.
3.2     This  Agreement  constitutes  the  entire  agreement between the parties
hereto  in  respect  of  the  matters  referred  to  herein.
3.3     The  parties hereto shall execute and deliver all such further documents
and  do  all such acts as any party may, either before or after the execution of
this  Agreement,  reasonably  require of the other in order that the full intent
and  meaning  of  this  Agreement  is  carried  out.
3.4     No  amendment  or interpretation of this Agreement shall be binding upon
the  parties  hereto  unless such amendment or interpretation is in written form
executed  by  all  of  the  parties  to  this  Agreement.
3.5     Any  notice  or  other  communication of any kind whatsoever to be given
under  this  Agreement shall be in writing and shall be delivered by hand, email
or  by  mail  to  the  parties  at:

       Reach  Technologies,  Inc.               BERT  Systems,  Inc.
       Suite 103 - 1581H Hillside Ave           Unit  130  -  2188  No.  5  Rd
       Victoria,  B.C.                          Richmond,  B.C.
       V8T  2C1                                 V6X  2T1
       Attention: Jeff Dilabough                Attention: Lance Rudelsheim

or  to  such other addresses as may be given in writing by the parties hereto in
the  manner  provided  for  in  this  paragraph.
3.6     This  Agreement  shall  be  governed  by  the  laws  of Washington State
applicable  therein,  and  the  parties hereby attorn to the jurisdiction of the
Courts  of  Washington  State.
3.7     This  Agreement  may  be  signed  by  fax  and  in  counterpart.

                                       11
<PAGE>
IN WITNESS WHEREOF the parties have hereunto set their hands and seals effective
as  of  the  Effective  Date  first  above  written.

SIGNED, SEALED AND DELIVERED BY          SIGNED, SEALED AND DELIVERED BY
REACH  TECHNOLOGIES,  INC.               BERT  LOGIC,  INC.

per:                                     per:

/s/  Glenn  Jones                        /s/  Lance  Rudelsheim
-------------------------------          -------------------------------
Authorized  Signatory                    Authorized  Signatory

Name of Signatory:  Glenn Jones          Name of Signatory:  Lance Rudelsheim

Title of Signatory:  Director            Title of Signatory:  Director

                                       12
<PAGE>
                                   APPENDIX A
                                   ----------

BERT  PRODUCT                       MODEL NUMBER         WHOLESALE PRICE
BERT  with  h/w, s/w & manual       BERT-40-Kit          $1,650
BERT-with  PC  &  Monitor           BERT-40-L            $3,450
BERT  with  rack-mount  PC          BERT-40-R            $4,350

BERT  with  portable  PC            BERT-40-P            $9,390
Additional  BERT  channel           BERT-40-C            $1,650
BERT  S/W  Development  Kit         BERT-SDK             $375

                                       13
<PAGE>
                                 PROMISSORY NOTE

                                                                    May 11, 2001

     FOR  VALUE  RECEIVED, BERT Logic Inc. of Unit 130 - 2188 No. 5 Rd Richmond,
B.C.  V6X 2T1 promises to pay to the order of Reach Technologies Inc., Suite 103
-  1581H  Hillside Ave Victoria, B.C. Canada V8T 1C1, or its assigns ("Holder"),
the  sum  of  five  thousand  dollars  ($5,000.00  US)  in the following manner:

     Interest  shall  accrue  on the unpaid balance at the rate of seven percent
(7%)  per  annum  from  the  date  set  forth  above.

     Principle  and  interest is due on May 11, 2002 or by earlier demand by the
Holder.  Prepayment  may  be  made  at  any  time.

          Upon  default  in  the  payment or of interest within ten (10) days of
when  payment  is  due, the whole of the principal sum then remaining unpaid and
all  interest accrued thereon shall, at the option of Holder, become immediately
due  and  payable, without demand or notice.  In the event any payment hereunder
is not made within ten (10) days of when payment is due, Reach Technologies, Inc
shall  have  the  right  to  terminate  Licensing  Agreement dated May 31, 2000,
immediately  and  without  penalty.

This  Note  shall  be  construed  in  accordance  with  the laws of the State of
Washington  and  venue  shall  lie  in  King  County,  Washington.

     This Agreement may be signed by fax and in counterpart.

     EXECUTED as of this 11th day of May, 2001.

/s/  Lance  Rudelsheim                            /s/  Glenn  Jones
---------------------------                       ---------------------------
BERT  Systems,  Inc.                              Reach  Technologies  Inc

                                       14
<PAGE>

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