Three One Systems International, Inc. was established in March 1999 in a Suburb of Chicago to support local businesses with IT solutions.

Our parent company "Three One Systems, Inc." has provided various IT services in Japanese market especially in the area of Database development since 1983 and as business grows, it expanded global network to USA, Europe and Australia.

Three One Systems Group has stored excellent knowledge/experiences regarding the computer application implemantations and IT maintenance. Using it and its global network we are ,in Chicago, providing our wide range IT services.

To start providing our services in USA "Three One Systems International, Inc. (TOSIN)" was established in New York in 1986.

In 1999, Three One Systems International, Inc. Chicago started business to provide IT services with local customers.

Our goal is customer's satisfaction. We will do our best all the time for customers!










orporate History
1983

Tokyo Japan, Establishment of
THREE ONE SYSTEMS, INC.
1986 New York, Establishment of
Three One Systems International, Inc.
1990 Amsterdam, Establishment of
THREE ONE SYSTEMS EUROPE B.V.(TOSE)
1991

Tokyo Japan, Establishment of
Design Technologies (D-TEC) as an sister company.
1999 Chicago U.S.A., Establishment of
Three One Systems International, Inc.
2001 Chicago office relocated to Wod Dale, IL
2008

Chicago office moved to Elk Gorve Village,IL

 
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