<PAGE>
 
                                                                      EXHIBIT 21

SUBSIDIARIES OF CAMBRIDGE TECHNOLOGY PARTNERS (MASSACHUSETTS), INC.

<TABLE> 
<CAPTION> 
Name of Subsidiary                                          Jurisdiction of Incorporation
------------------                                          -----------------------------
<S>                                                         <C> 
Cambridge Technology Partners International, Inc.                      Delaware               
                                                                                              
Cambridge Technology Partners (Latin America), Inc.                    Delaware               
                                                                                              
Cambridge Technology Partners (Mexico), S.A. de C.V.                   Mexico                 
                                                                                              
CTP Services, S.A. de C.V.                                             Mexico                 
                                                                                              
Cambridge Technology Partners (Venezuela) C.A.                         Venezuela              
                                                                                              
Cambridge Technology Partners de Brazil S/C LTDA                       Brazil                 
                                                                                              
Cambridge Technology Partners Ltd.                                     Ontario                
                                                                                              
Cambridge Technology Partners (Switzerland) S.A.                       Switzerland            
                                                                                              
Cambridge Technology Partners (Asia), Inc.                             Delaware               
                                                                                              
Cambridge Technology Partners Pty. Ltd.                                Australia              
                                                                                              
Cambridge Technology Partners India Private Limited                    India                  
                                                                                              
Cambridge Technology Partners Limited                                  Japan                  
                                                                                              
Cambridge Technology Partners (Europe), Inc.                           Delaware               
                                                                                              
Cambridge Technology Partners (Netherlands), B.V.                      Netherlands            
                                                                                              
Cambridge Technology Partners (UK), Inc.                               Delaware

Cambridge Technology Partners (UK), Ltd.                               United Kingdom         
                                                                                              
Cambridge Technology Partners Ireland Ltd.                             Ireland                
                                                                                              
Peter Chadwick Holdings Limited                                        United Kingdom         
                                                                                              
Cambridge Technology Partners (Benelux) B.V.                           Netherlands            
                                                                                              
Cambridge PCHL L.L.C.                                                  Delaware               
                                                                                              
Cambridge Technology Partners Cambridge                                                       
     Management Consulting, Inc.                                       California             
</TABLE> 
<PAGE>
 
Cambridge Technology Partners-Enterprise                        
     Resources Solutions, Inc.                                   California
                                                                    
Cambridge Technology Partners Securities Corporation             Massachusetts

Excell Data Corporation                                          Washington

Cambridge Technology Capital                                      
     Management, Inc.                                            Delaware

Cambridge Technology CGP, Inc.                                   Delaware