Exhibit 21.1

SUBSIDIARIES OF THE COMPANY
 
 
State of
Subsidiary
Incorporation
   
Clayborn Contracting Group, Inc.
California
Heinz Corporation
Missouri
Invisinet, Inc.
Delaware
New England Communication Systems, Inc.
Connecticut
Quality Communications & Alarm Company, Inc.
New Jersey
Southeastern Communication Service, Inc.
Florida
Voacolo Electric, Inc.
New Jersey
Walker Comm, Inc.
California
   
Taian AGS Pipeline Construction Co. Ltd.
Shandong Province
(60% ownership interest)
People’s Republic of China